Some standard content:
ICS 71.060.20
Registration No.: 10925-2000
Material Management Industry Standard of the People's Republic of China WB/T1019—2002
20022297
Caustic burned magnesia for magnesiumoxychloride cement products
Published on September 2, 2002
Implementation on November 1, 2002
Published by the State Economic and Trade Commission of the People's Republic of China
WB/T1019--2002
This standard is formulated to improve the quality of light burned magnesia for magnesia products, strengthen industry management and standardize market behavior. This standard refers to GB/T5069.1-2001 "Chemical analysis methods for magnesium and magnesium-aluminum (aluminum-magnesium) refractories - gravimetric determination of ignition loss", GB/T5070.7-1985 "Chemical analysis methods for magnesium-chromium refractories - CyDTA volumetric determination of magnesium oxide content", and YB/T5206-1993 "Light-burned magnesium powder". Appendix A of this standard is a normative appendix. This standard was proposed by the China Magnesite Industry Association. This standard was drafted by Shenyang Institute of Architecture and Building Engineering; Liaoning Haicheng Dongxin Industrial Corporation Magnesium Mine, Shandong Laizhou Yufeng Talc Co., Ltd., Zhangjiagang Yulong Decorative Materials Co., Ltd., China Magnesite Industry Association Shandong Research Base, Shandong Institute of Building Science, Kunyang Building Materials (Kunshan) Co., Ltd., Shandong Penglai Huasheng Board Industry Co., Ltd. participated in the drafting. The main drafters of this standard are Yu Hongfa, Mou Zhongwen, Zhang Xiuru, Wang Zifu, Zhu Yujie, Zhu Jintian, Lin Wenguan, Li Honghua and Wang Tao. This standard is interpreted by the China Magnesium Industry Association. This standard is published for the first time.
1 Scope
Light-burned magnesium oxide for magnesia products
WB/T1019—2002
This standard specifies the classification, requirements, test methods, inspection rules, packaging, marking, transportation and storage of light-burned magnesium oxide for magnesia products. This standard applies to light-burned magnesium oxide made from magnesia ore (MgCO3) by calcination and grinding for magnesia products. 2 Normative references
The clauses in the following documents become the clauses of this standard through reference in this standard. For all dated references, all subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, parties to an agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. For undated references, the latest version shall apply to this standard. GB/T176-1996 Chemical analysis method for cement (eqvISO680:1990) GB/T1345--1991 Cement fineness test method (80μm sieve analysis method) GB/T1346--2001 Test method for cement standard consistency water consumption, setting time and stability GB/T5069.1-2001 Chemical analysis method for magnesium and magnesium-aluminum (aluminum-magnesium) refractories Gravimetric determination of ignition loss GB/T5070.7-1985 Chemical analysis method for magnesium-chromium refractories CyDTA volumetric determination of magnesium oxide content GB12573-1990 Cement sampling method ||tt ||GB/T17671—1999
Test method for cement mortar strength (ISO method) (idtISO679:1989) WB/T1018--2002
Industrial magnesium chloride for magnesia products
YB/T5206--1993 Lightly burned magnesium powder
3 Grading
Lightly burned magnesium oxide is divided into three grades, QM-85, QM-80 and QM-75, according to YB/T5206. According to the content of active magnesium oxide and the physical and mechanical properties of magnesium oxychloride cement prepared with it, the products are divided into superior products (A), first-class products (B) and qualified products (C). 4 Requirements
4.1 Appearance quality
Lightly burned magnesium oxide of the same batch should have the same color. No moisture agglomeration is allowed. 4.2 Chemical composition
It should meet the requirements of Table 1.
Table 1 Chemical composition
Active MgO
Free Cao
Ignition loss
Superior product (A)
First-class product (B)
Unit: %
Qualified product (C)
WB/T 1019—2002
4.3 Fineness
Fineness is expressed by the sieve residue rate of 80um square hole sieve (180 mesh) and 125m square hole sieve (120 mesh). The sieve residue rate of 80um square hole sieve for superior and first-class products shall not exceed 10.0%, and the sieve residue rate of 125μm square hole sieve for qualified products shall not exceed 3.0%. 4.4 Setting time
The initial setting shall not be earlier than 45min, and the final setting shall not be later than 6h. 4.5 Stabilitybzxz.net
Must be qualified by the test cake method.
4.6 Strength
The strength of magnesium oxychloride cement prepared with various grades and levels of light-burned magnesium oxide at each age shall not be lower than the values in Table 2. Table 2 Strength
Flexural strength
Compressive strength
Test method
5.1 Appearance quality
Superior products (A)
Observe the color and agglomeration of light-burned magnesium oxide by visual inspection. 5.2Mgo
Perform according to GB5069.9.
5.3 Active MgO
5.3.1 Analysis method
Superior products (B)
Unit is MPa
Qualified products (C)
Analyze the active MgO content by water method. The newly developed method for analyzing the content of active MgO shall comply with the provisions of Appendix A (Normative Appendix).
5.3.2 Hydration method
5.3.2.1 Reagents: steamed stuffing water.
5.3.2.2 Instruments: analytical balance, glassware III, desiccator, and oven shall comply with the provisions of GB/T176. 5.3.2.3 Analysis steps: Accurately weigh about 2.0g (accurate to 0.0001g) of lightly calcined magnesium oxide sample, place it in a 24mm×40mm glass weighing bottle, add 20mL of distilled water, cover the lid and leave a small gap, and stand for hydration at a temperature of 20°C ± 2°C and a relative humidity of (70±5)% for 24h, then place it in an oven at 100°C~110°C for hydration and pre-drying. Then heat it to 150°C, dry it to constant weight at this temperature, then take it out and cool it to room temperature in a desiccator, and then weigh the mass of the hydrated sample. 5.3.2.4 Result expression: The active MgO content of light-burned magnesium oxide is calculated according to formula (1) (accurate to 0.01%): W
W-the content of active MgO in light-burned magnesium powder,%; W,----mass of sample in g;
W-mass of sample after hydration·g.
5.4 Free CaO
According to GB/T176.
·(1)
5.5 Loss on ignition
According to GB5069.1.
5.6 Fineness
According to GB/T1345.
5.7 Setting time and stability
5.7.1 Materials
WB/T1019—2002
5.7.1.1 Light-burned magnesium oxide: When the light-burned magnesium oxide is to be kept for more than 24 hours from sampling to testing, it should be stored in a basically full and airtight container, which should not react with the light-burned magnesium oxide. 5.7.1.2 Magnesium chloride: It should meet the quality requirements of WB/T1018. 5.7.1.3 Water: Distilled water is used for arbitration tests or other important tests, and drinking water can be used for other tests. 5.7.2 Proportion
The amount of light-burned magnesium oxide is 500g.
The amount of magnesium chloride and mixing water is calculated according to the molar ratio of MgO, MgCl2 and HO of 5:1:13. When calculating MgO, the active MgO content of the light-burned magnesium oxide shall be used as the standard.
5.7.3 Mixing of pure slurry
Perform according to GB/T1346. Before mixing, magnesium chloride must be dissolved in mixing water to prepare MgCl solution. 5.7.4 Curing
Curate at a temperature of 20℃±2℃ and a relative humidity of (70±5)%. 5.7.5 Determination of setting time
Perform according to GB/T1346.
5.7.6 Determination of stability
Perform according to GB/T1346. Curing of the test cake (24±2)h, removing the glass plate, and continuing to cure until the age of 7d, observe with the naked eye for no cracks, and use a steel ruler to check for no bending, and judge that the stability is qualified. 5.8 Strength
5.8.1 Materials
Light-burned magnesium oxide, magnesium fluoride and water are the same as in 5.7.1.1 and 5.7.1. of this standard.2 and 5.7.1.3. Standard sand shall meet the quality requirements of Chapter 11 of GB/T17671. 5.8.2 Preparation of MgCl2 solution
Magnesium chloride shall be dissolved in water to prepare a solution with a density of 1.2kg/L. 5.8.3 Preparation of test pieces
5.8.3.1 Proportion: One pot of mortar is used to form three test pieces. The materials and quantities to be weighed for each pot of mortar are as follows: lightly burned magnesia: (450±2)g;
Standard sand: (1350±5)g;
MgCl, solution: (225±1)mL.
5.8.3.2 Test piece forming: According to GB/T17671, two groups of 40mm×40mm×160mm test pieces are formed. 5.8.3.3 Specimen curing: Curing for 1 day at a temperature of 20°C ± 2°C and a relative humidity of (70 ± 5)%, then demoulding, and continuing curing under this condition until the test age.
5.8.3.4 Strength test: Determine the 3d and 28d flexural strength and compressive strength according to GB/T17671. 6 Inspection rules
6.1 Inspection classification
6.1.1 Factory inspection
Inspection items: Appearance quality, MgO, free CaO, active MgO, ignition loss, fineness, setting time and stability. 3
WB/T1019-2002
6.1.2 Type inspection
6.1.2.1 Provisions for type inspection
Type inspection should be carried out in any of the following cases: a) when a new factory is put into production and the production process has major changes; b) when production is resumed after a long period of suspension;
when the factory inspection results are significantly different from the last type inspection; d) under normal production conditions, once a year; e) when the national quality supervision agency makes a request. 6.1.2.2 Items of type inspection
Appearance quality, MgO, free CaO, active MgO, ignition loss, fineness, setting time, stability and strength. 6.2 Numbering and sampling
Light-burned magnesium oxide shall be numbered and sampled according to the same brand and grade before leaving the factory. Each number is a sampling unit. Products of the same brand and grade are numbered as 100t. If the amount is less than 100t but more than 50t, they can also be numbered as one. The sampling method shall be carried out in accordance with GB12573. Sampling shall be representative and can be taken continuously or from more than 20 different parts with equal amount of samples, with a total amount of at least 12kg.
The samples taken shall be inspected for delivery according to the method specified in Chapter 5 of this standard. 6.3 Lightly burned magnesium oxide before delivery
Lightly burned magnesium oxide before delivery shall ensure the active MgO content before delivery, and the other technical requirements shall comply with the relevant requirements of this standard. 6.4 Product acceptance
6.4.1 Scrap
Any item of free CaO, loss on ignition and stability that does not meet the requirements of this standard shall be deemed as scrap. 6.4.2 Unqualified products
If any of the appearance, MgO, active MgO, fineness, and setting time does not meet the requirements of this standard or the strength is lower than the commodity level, it is judged as an unqualified product of this brand and grade. If it meets the requirements of the next brand or grade, it can be downgraded and used. 6.5 Test report
The test report should include the various technical requirements and test results specified in this standard. When the user needs it, the light-burned magnesium oxide factory should send the test results within 7 days from the date of product delivery. 6.6 Delivery and acceptance
6.6.1'The quality acceptance of light-burned magnesium oxide at the time of delivery can be based on the physical sample and its inspection results, or it can be based on the inspection report of the light-burned magnesium oxide factory's products with the same number. The acceptance method shall be agreed upon by the supply and demand parties and shall be indicated in the contract or agreement. 6.6.2 When the inspection results of the physical sample are used as the acceptance basis, the supply and demand parties shall jointly take samples and seal them before delivery or at the place of delivery. The sampling method is in accordance with GB12573, and the sampling quantity is 20kg, which is divided into two equal parts. One part is kept by the supplier for 40 days, and the other part is inspected by the buyer according to the items and methods specified in this standard. Within 40 days, if the buyer finds that the product quality does not meet the requirements of this standard and the supplier has objections, the two parties shall send the other sample kept by the supplier to the provincial or provincial-level nationally recognized product quality supervision and inspection agency for arbitration inspection. 6.6.3 When the inspection report of the same number of products of the light-burned magnesium oxide factory is used as the acceptance basis, the buyer shall extract the sample from the light-burned magnesium oxide with the same number before shipment or at the time of delivery, and the two parties shall seal it together and keep it for three months; or entrust the supplier to extract the sample from the light-burned magnesium oxide with the same number, and seal it for three months.
Within three months, if the buyer has doubts about the quality of light-burned magnesium oxide, the supply and demand parties shall send the sealed sample to the provincial or provincial-level nationally recognized product quality supervision and inspection agency for arbitration inspection. 7 Packaging, marking, transportation and storage
7.1 Packaging
WB/T1019—2002
Light-burned magnesium oxide is packed in woven bags lined with plastic film. The net content of each bag is 50kg, and shall not be less than 98% of the marked weight; the total weight of 20 bags randomly selected shall not be less than 1000kg. Other packaging forms shall be determined by negotiation between the supply and demand parties, but the relevant bagging quality requirements must comply with the above principles.
7.2 Marking
The packaging bag of light-burned magnesium oxide should be clearly marked with: product name, number, brand, grade, net content, production license number, producer name and address, implementation standard number, production year, month and day. The product name and brand grade should be printed in black on both sides of the packaging bag. 7.3 Transportation and storage
Light-burned magnesium oxide shall not be exposed to moisture during transportation and storage. Products of different brands and grades shall be stored and transported separately and shall not be mixed. WB/T 1019-2002
A.1 Scope of application
Appendix A
(Normative Appendix)
Newly developed analytical method for active MgO content
This appendix specifies the requirements and activation procedures for the newly developed analytical method used to determine the active MgO content of light-burned magnesia. A.2 The newly developed analytical method for active MgO content refers to the newly developed chemical analysis method.
A.3 The evaluation basis of the newly developed analytical method for active MgO content should be compared with the hydration method at the same time, and the average relative error within the scope of this standard shall not be greater than ±3% based on the results of the hydration method.
A.4 Basic requirements
When the newly developed analytical method for active MgO content is used to determine the active MgO content of light-burned magnesia, it must be fully tested and identified by the scientific research institutions designated by the China Federation of Logistics and Purchasing to prove that it can accurately determine the active MgO content, and formulate corresponding operating procedures, which shall be approved by the China Federation of Logistics and Purchasing or industry associations. After application, comparative tests should be conducted regularly with the hydration method. A.5 Information required for approval of newly developed active MgO content analysis method A.5.1 Feasibility study report of the newly developed active MgO content analysis method, which should include experimental studies such as the principle, instrument, reagent, operation steps, adaptability, repeatability, error analysis and comparison results with the hydration method. A.5.2 Trial summary report of the newly developed active MgO content analysis method. A.5.3 Operating procedures and preparation instructions for the newly developed active MgO content analysis method. WB/T1019-2002
Material Management of the People's Republic of China
Industry Standard
Light Burned Magnesium Oxide for Magnesium Products
WB/T1019-—2002
Published by China Standards Press
No. 16, Sanlihebei Street, Fuxingmenwai, Beijing
Postal Code: 100045
Tel: 68523946
68517548
Printed by Qinhuangdao Printing Factory of China Standards Press Published by Xinhua Bookstore Beijing Publishing House
Format 880×12301/16
First edition in November 2002
Sold by Xinhua Bookstores in various places
Printing sheet 3/4
Word count 14,000 words
First printing in November 2002
Print run 1-2500
Website www.bzcbs.com
Copyright reserved
Infringements must be investigated
Report phone number: (010) 685335332 Specimen molding: According to GB/T17671, mold 2 groups of 40mm×40mm×160mm specimens. 5.8.3.3 Specimen curing: Cured for 1 day at a temperature of 20°C ± 2°C and a relative humidity of (70 ± 5)%, then demoulded, and continued to cure under this condition until the test age.
5.8.3.4 Strength test: Determine the 3d and 28d flexural strength and compressive strength according to GB/T17671. 6 Inspection rules
6.1 Inspection classification
6.1.1 Factory inspection
Inspection items: Appearance quality, MgO, free CaO, active MgO, ignition loss, fineness, setting time and stability. 3
WB/T1019-2002
6.1.2 Type inspection
6.1.2.1 Provisions for type inspection
Type inspection should be carried out in any of the following cases: a) when a new factory is put into production and the production process has major changes; b) when production is resumed after a long period of suspension;
when the factory inspection results are significantly different from the last type inspection; d) under normal production conditions, once a year; e) when the national quality supervision agency makes a request. 6.1.2.2 Items of type inspection
Appearance quality, MgO, free CaO, active MgO, ignition loss, fineness, setting time, stability and strength. 6.2 Numbering and sampling
Light-burned magnesium oxide shall be numbered and sampled according to the same brand and grade before leaving the factory. Each number is a sampling unit. Products of the same brand and grade are numbered as 100t. If the amount is less than 100t but more than 50t, they can also be numbered as one. The sampling method shall be carried out in accordance with GB12573. Sampling shall be representative and can be taken continuously or from more than 20 different parts with equal amount of samples, with a total amount of at least 12kg.
The samples taken shall be inspected for delivery according to the method specified in Chapter 5 of this standard. 6.3 Lightly burned magnesium oxide before delivery
Lightly burned magnesium oxide before delivery shall ensure the active MgO content before delivery, and the other technical requirements shall comply with the relevant requirements of this standard. 6.4 Product acceptance
6.4.1 Scrap
Any item of free CaO, loss on ignition and stability that does not meet the requirements of this standard shall be deemed as scrap. 6.4.2 Unqualified products
If any of the appearance, MgO, active MgO, fineness, and setting time does not meet the requirements of this standard or the strength is lower than the commodity level, it is judged as an unqualified product of this brand and grade. If it meets the requirements of the next brand or grade, it can be downgraded and used. 6.5 Test report
The test report should include the various technical requirements and test results specified in this standard. When the user needs it, the light-burned magnesium oxide factory should send the test results within 7 days from the date of product delivery. 6.6 Delivery and acceptance
6.6.1'The quality acceptance of light-burned magnesium oxide at the time of delivery can be based on the physical sample and its inspection results, or it can be based on the inspection report of the light-burned magnesium oxide factory's products with the same number. The acceptance method shall be agreed upon by the supply and demand parties and shall be indicated in the contract or agreement. 6.6.2 When the inspection results of the physical sample are used as the acceptance basis, the supply and demand parties shall jointly take samples and seal them before delivery or at the place of delivery. The sampling method is in accordance with GB12573, and the sampling quantity is 20kg, which is divided into two equal parts. One part is kept by the supplier for 40 days, and the other part is inspected by the buyer according to the items and methods specified in this standard. Within 40 days, if the buyer finds that the product quality does not meet the requirements of this standard and the supplier has objections, the two parties shall send the other sample kept by the supplier to the provincial or provincial-level nationally recognized product quality supervision and inspection agency for arbitration inspection. 6.6.3 When the inspection report of the same number of products of the light-burned magnesium oxide factory is used as the acceptance basis, the buyer shall extract the sample from the light-burned magnesium oxide with the same number before shipment or at the time of delivery, and the two parties shall seal it together and keep it for three months; or entrust the supplier to extract the sample from the light-burned magnesium oxide with the same number, and seal it for three months.
Within three months, if the buyer has doubts about the quality of light-burned magnesium oxide, the supply and demand parties shall send the sealed sample to the provincial or provincial-level nationally recognized product quality supervision and inspection agency for arbitration inspection. 7 Packaging, marking, transportation and storage
7.1 Packaging
WB/T1019—2002
Light-burned magnesium oxide is packed in woven bags lined with plastic film. The net content of each bag is 50kg, and shall not be less than 98% of the marked weight; the total weight of 20 bags randomly selected shall not be less than 1000kg. Other packaging forms shall be determined by negotiation between the supply and demand parties, but the relevant bagging quality requirements must comply with the above principles.
7.2 Marking
The packaging bag of light-burned magnesium oxide should be clearly marked with: product name, number, brand, grade, net content, production license number, producer name and address, implementation standard number, production year, month and day. The product name and brand grade should be printed in black on both sides of the packaging bag. 7.3 Transportation and storage
Light-burned magnesium oxide shall not be exposed to moisture during transportation and storage. Products of different brands and grades shall be stored and transported separately and shall not be mixed. WB/T 1019-2002
A.1 Scope of application
Appendix A
(Normative Appendix)
Newly developed analytical method for active MgO content
This appendix specifies the requirements and activation procedures for the newly developed analytical method used to determine the active MgO content of light-burned magnesia. A.2 The newly developed analytical method for active MgO content refers to the newly developed chemical analysis method.
A.3 The evaluation basis of the newly developed analytical method for active MgO content should be compared with the hydration method at the same time, and the average relative error within the scope of this standard shall not be greater than ±3% based on the results of the hydration method.
A.4 Basic requirements
When the newly developed analytical method for active MgO content is used to determine the active MgO content of light-burned magnesia, it must be fully tested and identified by the scientific research institutions designated by the China Federation of Logistics and Purchasing to prove that it can accurately determine the active MgO content, and formulate corresponding operating procedures, which shall be approved by the China Federation of Logistics and Purchasing or industry associations. After application, comparative tests should be conducted regularly with the hydration method. A.5 Information required for approval of newly developed active MgO content analysis method A.5.1 Feasibility study report of the newly developed active MgO content analysis method, which should include experimental studies such as the principle, instrument, reagent, operation steps, adaptability, repeatability, error analysis and comparison results with the hydration method. A.5.2 Trial summary report of the newly developed active MgO content analysis method. A.5.3 Operating procedures and preparation instructions for the newly developed active MgO content analysis method. WB/T1019-2002
Material Management of the People's Republic of China
Industry Standard
Light Burned Magnesium Oxide for Magnesium Products
WB/T1019-—2002
Published by China Standards Press
No. 16, Sanlihebei Street, Fuxingmenwai, Beijing
Postal Code: 100045
Tel: 68523946
68517548
Printed by Qinhuangdao Printing Factory of China Standards Press Published by Xinhua Bookstore Beijing Publishing House
Format 880×12301/16
First edition in November 2002
Sold by Xinhua Bookstores in various places
Printing sheet 3/4
Word count 14,000 words
First printing in November 2002
Print run 1-2500
Website www.bzcbs.com
Copyright reserved
Infringements must be investigated
Report phone number: (010) 685335332 Specimen molding: According to GB/T17671, mold 2 groups of 40mm×40mm×160mm specimens. 5.8.3.3 Specimen curing: Cured for 1 day at a temperature of 20°C ± 2°C and a relative humidity of (70 ± 5)%, then demoulded, and continued to cure under this condition until the test age.
5.8.3.4 Strength test: Determine the 3d and 28d flexural strength and compressive strength according to GB/T17671. 6 Inspection rules
6.1 Inspection classification
6.1.1 Factory inspection
Inspection items: Appearance quality, MgO, free CaO, active MgO, ignition loss, fineness, setting time and stability. 3
WB/T1019-2002
6.1.2 Type inspection
6.1.2.1 Provisions for type inspection
Type inspection should be carried out in any of the following cases: a) when a new factory is put into production and the production process has major changes; b) when production is resumed after a long period of suspension;
when the factory inspection results are significantly different from the last type inspection; d) under normal production conditions, once a year; e) when the national quality supervision agency makes a request. 6.1.2.2 Items of type inspection
Appearance quality, MgO, free CaO, active MgO, ignition loss, fineness, setting time, stability and strength. 6.2 Numbering and sampling
Light-burned magnesium oxide shall be numbered and sampled according to the same brand and grade before leaving the factory. Each number is a sampling unit. Products of the same brand and grade are numbered as 100t. If the amount is less than 100t but more than 50t, they can also be numbered as one. The sampling method shall be carried out in accordance with GB12573. Sampling shall be representative and can be taken continuously or from more than 20 different parts with equal amount of samples, with a total amount of at least 12kg.
The samples taken shall be inspected for delivery according to the method specified in Chapter 5 of this standard. 6.3 Lightly burned magnesium oxide before delivery
Lightly burned magnesium oxide before delivery shall ensure the active MgO content before delivery, and the other technical requirements shall comply with the relevant requirements of this standard. 6.4 Product acceptance
6.4.1 Scrap
Any item of free CaO, loss on ignition and stability that does not meet the requirements of this standard shall be deemed as scrap. 6.4.2 Unqualified products
If any of the appearance, MgO, active MgO, fineness, and setting time does not meet the requirements of this standard or the strength is lower than the commodity level, it is judged as an unqualified product of this brand and grade. If it meets the requirements of the next brand or grade, it can be downgraded and used. 6.5 Test report
The test report should include the various technical requirements and test results specified in this standard. When the user needs it, the light-burned magnesium oxide factory should send the test results within 7 days from the date of product delivery. 6.6 Delivery and acceptance
6.6.1'The quality acceptance of light-burned magnesium oxide at the time of delivery can be based on the physical sample and its inspection results, or it can be based on the inspection report of the light-burned magnesium oxide factory's products with the same number. The acceptance method shall be agreed upon by the supply and demand parties and shall be indicated in the contract or agreement. 6.6.2 When the inspection results of the physical sample are used as the acceptance basis, the supply and demand parties shall jointly take samples and seal them before delivery or at the place of delivery. The sampling method is in accordance with GB12573, and the sampling quantity is 20kg, which is divided into two equal parts. One part is kept by the supplier for 40 days, and the other part is inspected by the buyer according to the items and methods specified in this standard. Within 40 days, if the buyer finds that the product quality does not meet the requirements of this standard and the supplier has objections, the two parties shall send the other sample kept by the supplier to the provincial or provincial-level nationally recognized product quality supervision and inspection agency for arbitration inspection. 6.6.3 When the inspection report of the same number of products of the light-burned magnesium oxide factory is used as the acceptance basis, the buyer shall extract the sample from the light-burned magnesium oxide with the same number before shipment or at the time of delivery, and the two parties shall seal it together and keep it for three months; or entrust the supplier to extract the sample from the light-burned magnesium oxide with the same number, and seal it for three months.
Within three months, if the buyer has doubts about the quality of light-burned magnesium oxide, the supply and demand parties shall send the sealed sample to the provincial or provincial-level nationally recognized product quality supervision and inspection agency for arbitration inspection. 7 Packaging, marking, transportation and storage
7.1 Packaging
WB/T1019—2002
Light-burned magnesium oxide is packed in woven bags lined with plastic film. The net content of each bag is 50kg, and shall not be less than 98% of the marked weight; the total weight of 20 bags randomly selected shall not be less than 1000kg. Other packaging forms shall be determined by negotiation between the supply and demand parties, but the relevant bagging quality requirements must comply with the above principles.
7.2 Marking
The packaging bag of light-burned magnesium oxide should be clearly marked with: product name, number, brand, grade, net content, production license number, producer name and address, implementation standard number, production year, month and day. The product name and brand grade should be printed in black on both sides of the packaging bag. 7.3 Transportation and storage
Light-burned magnesium oxide shall not be exposed to moisture during transportation and storage. Products of different brands and grades shall be stored and transported separately and shall not be mixed. WB/T 1019-2002
A.1 Scope of application
Appendix A
(Normative Appendix)
Newly developed analytical method for active MgO content
This appendix specifies the requirements and activation procedures for the newly developed analytical method used to determine the active MgO content of light-burned magnesia. A.2 The newly developed analytical method for active MgO content refers to the newly developed chemical analysis method.
A.3 The evaluation basis of the newly developed analytical method for active MgO content should be compared with the hydration method at the same time, and the average relative error within the scope of this standard shall not be greater than ±3% based on the results of the hydration method.
A.4 Basic requirements
When the newly developed analytical method for active MgO content is used to determine the active MgO content of light-burned magnesia, it must be fully tested and identified by the scientific research institutions designated by the China Federation of Logistics and Purchasing to prove that it can accurately determine the active MgO content, and formulate corresponding operating procedures, which shall be approved by the China Federation of Logistics and Purchasing or industry associations. After application, comparative tests should be conducted regularly with the hydration method. A.5 Information required for approval of newly developed active MgO content analysis method A.5.1 Feasibility study report of the newly developed active MgO content analysis method, which should include experimental studies such as the principle, instrument, reagent, operation steps, adaptability, repeatability, error analysis and comparison results with the hydration method. A.5.2 Trial summary report of the newly developed active MgO content analysis method. A.5.3 Operating procedures and preparation instructions for the newly developed active MgO content analysis method. WB/T1019-2002
Material Management of the People's Republic of China
Industry Standard
Light Burned Magnesium Oxide for Magnesium Products
WB/T1019-—2002
Published by China Standards Press
No. 16, Sanlihebei Street, Fuxingmenwai, Beijing
Postal Code: 100045
Tel: 68523946
68517548
Printed by Qinhuangdao Printing Factory of China Standards Press Published by Xinhua Bookstore Beijing Publishing House
Format 880×12301/16
First edition in November 2002
Sold by Xinhua Bookstores in various places
Printing sheet 3/4
Word count 14,000 words
First printing in November 2002
Print run 1-2500
Website www.bzcbs.com
Copyright reserved
Infringements must be investigated
Report phone number: (010) 685335332 Items for type inspection
Appearance quality, MgO, free CaO, active MgO, ignition loss, fineness, setting time, stability and strength. 6.2 Numbering and sampling
Light-burned magnesium oxide shall be numbered and sampled according to the same brand and grade before leaving the factory. Each number is a sampling unit. Products of the same brand and grade are numbered as 100t. When less than 100t but more than 50t, they can also be used as one number. The sampling method shall be carried out in accordance with GB12573. Sampling shall be representative and can be taken continuously or from more than 20 different parts with equal amount of samples, with a total amount of at least 12kg.
The samples shall be inspected for delivery according to the method specified in Chapter 5 of this standard. 6.3 Light-burned magnesium oxide before delivery
Light-burned magnesium oxide before delivery shall ensure the content of active MgO before delivery, and the other technical requirements shall comply with the relevant requirements of this standard. 6.4 Product Acceptance
6.4.1 Scrap
Any item of free CaO, ignition loss, and stability that does not meet the requirements of this standard shall be deemed as scrap. 6.4.2 Unqualified Products
Any item of appearance, MgO, active MgO, fineness, and setting time that does not meet the requirements of this standard or whose strength is lower than the index of commodity grade shall be deemed as unqualified product of this brand and grade. If it meets the requirements of the next brand or grade, it can be downgraded and used. 6.5 Test Report
The test report shall include the various technical requirements and test results specified in this standard. When required by the user, the light-burned magnesium oxide factory shall send the test results within 7 days from the date of product shipment. 6.6 Delivery and Acceptance
6.6.1'The quality acceptance of light-burned magnesium oxide at the time of delivery can be based on the physical sample and its inspection results, or on the inspection report of the light-burned magnesium oxide factory's product with the same number. The acceptance method shall be agreed upon by the supply and demand parties and shall be indicated in the contract or agreement. 6.6.2 When the inspection results of physical samples are used as the basis for acceptance, the supply and demand parties shall jointly take samples and seal them before shipment or at the place of delivery. The sampling method shall be carried out in accordance with GB12573, and the sampling quantity shall be 20kg, which shall be reduced to two equal parts. One part shall be kept by the supplier for 40 days, and the other part shall be inspected by the demand party according to the items and methods specified in this standard. Within 40 days, if the demand party finds that the product quality does not meet the requirements of this standard and the supplier has objections, the two parties shall send the other sample kept by the supplier to the provincial or provincial-level nationally recognized product quality supervision and inspection agency for arbitration inspection. 6.6.3 When the inspection report of the same number product of the light-burned magnesium oxide factory is used as the basis for acceptance, the demand party shall take samples from the light-burned magnesium oxide with the same number before shipment or at the time of delivery, and the two parties shall seal them together and keep them for three months; or entrust the supplier to take samples from the light-burned magnesium oxide with the same number, and seal them and keep them for three months.
Within three months, if the buyer has doubts about the quality of light-burned magnesium oxide, the supplier and buyer shall send the sealed samples to the provincial or provincial-level nationally recognized product quality supervision and inspection agency for arbitration inspection. 7 Packaging, marking, transportation and storage
7.1 Packaging
WB/T1019—2002
Light-burned magnesium oxide is packaged in woven bags lined with plastic film. The net content of each bag is 50kg, and shall not be less than 98% of the marked weight; the total weight of 20 bags randomly selected shall not be less than 1000kg. Other packaging forms shall be determined by negotiation between the supplier and the buyer, but the relevant bagging quality requirements must comply with the above principles.
7.2 Marking
The packaging bag of light-burned magnesium oxide should be clearly marked with: product name, number, brand, grade, net content, production license number, producer name and address, implementation standard number, production year, month and day. The product name and brand level should be printed in black on both sides of the packaging bag. 7.3 Transportation and storage
Light-burned magnesium oxide must not be exposed to moisture during transportation and storage. Products of different brands and grades should be stored and transported separately and must not be mixed. WB/T 1019-2002
A.1 Scope of application
Appendix A
(Normative Appendix)
Newly developed analytical method for active MgO content
This appendix specifies the requirements and activation procedures for the newly developed analytical method used to determine the active MgO content of light-burned magnesium oxide. A.2 The newly developed analytical method for active MgO content refers to the newly developed chemical analysis method.
A.3 The evaluation basis of the newly developed analytical method for active MgO content should be compared with the hydration method at the same time, and the average relative error within the scope of this standard shall not be greater than ±3%.
A.4 Basic requirements
When using the newly developed active MgO content analysis method to determine the active MgO content of light-burned magnesia, it must be fully tested and identified by the scientific research institutions designated by the China Federation of Logistics and Purchasing to prove that it can accurately determine the active MgO content, and formulate corresponding operating procedures, which must be approved by the China Federation of Logistics and Purchasing or industry associations. After application, it should be regularly compared with the hydration method. A.5 Information required for the approval of the newly developed active MgO content analysis method A.5.1 Feasibility study report of the newly developed active MgO content analysis method, which should include experimental research on the principle, instruments, reagents, operating steps, adaptability, repeatability, error analysis and comparison results with the hydration method. A.5.2 Trial summary report of the newly developed active MgO content analysis method. A.5.3 Operating procedures and preparation instructions for the newly developed active MgO content analysis method. WB/T1019-2002
Material Management of the People's Republic of China
Industry Standard
Light Burned Magnesium Oxide for Magnesium Products
WB/T1019-—2002
Published by China Standards Press
No. 16, Sanlihebei Street, Fuxingmenwai, Beijing
Postal Code: 100045
Tel: 68523946
68517548
Printed by Qinhuangdao Printing Factory of China Standards Press Published by Beijing Publishing House of Xinhua Bookstore
Format 880×12301/16
First edition in November 2002
Sold by Xinhua Bookstores in various places
Printing sheet 3/4
Word count 14,000 words
First printing in November 2002
Print run 1-2500
Website www.bzcbs.com
Copyright reserved
Infringements must be investigated
Report phone number: (010) 685335332 Items for type inspection
Appearance quality, MgO, free CaO, active MgO, ignition loss, fineness, setting time, stability and strength. 6.2 Numbering and sampling
Light-burned magnesium oxide shall be numbered and sampled according to the same brand and grade before leaving the factory. Each number is a sampling unit. Products of the same brand and grade are numbered as 100t. When less than 100t but more than 50t, they can also be used as one number. The sampling method shall be carried out in accordance with GB12573. Sampling shall be representative and can be taken continuously or from more than 20 different parts with equal amount of samples, with a total amount of at least 12kg.
The samples shall be inspected for delivery according to the method specified in Chapter 5 of this standard. 6.3 Light-burned magnesium oxide before delivery
Light-burned magnesium oxide before delivery shall ensure the content of active MgO before delivery, and the other technical requirements shall comply with the relevant requirements of this standard. 6.4 Product Acceptance
6.4.1 Scrap
Any item of free CaO, ignition loss, and stability that does not meet the requirements of this standard shall be deemed as scrap. 6.4.2 Unqualified Products
Any item of appearance, MgO, active MgO, fineness, and setting time that does not meet the requirements of this standard or whose strength is lower than the index of commodity grade shall be deemed as unqualified product of this brand and grade. If it meets the requirements of the next brand or grade, it can be downgraded and used. 6.5 Test Report
The test report shall include the various technical requirements and test results specified in this standard. When required by the user, the light-burned magnesium oxide factory shall send the test results within 7 days from the date of product shipment. 6.6 Delivery and Acceptance
6.6.1'The quality acceptance of light-burned magnesium oxide at the time of delivery can be based on the physical sample and its inspection results, or on the inspection report of the light-burned magnesium oxide factory's product with the same number. The acceptance method shall be agreed upon by the supply and demand parties and shall be indicated in the contract or agreement. 6.6.2 When the inspection results of physical samples are used as the basis for acceptance, the supply and demand parties shall jointly take samples and seal them before shipment or at the place of delivery. The sampling method shall be carried out in accordance with GB12573, and the sampling quantity shall be 20kg, which shall be reduced to two equal parts. One part shall be kept by the supplier for 40 days, and the other part shall be inspected by the demand party according to the items and methods specified in this standard. Within 40 days, if the demand party finds that the product quality does not meet the requirements of this standard and the supplier has objections, the two parties shall send the other sample kept by the supplier to the provincial or provincial-level nationally recognized product quality supervision and inspection agency for arbitration inspection. 6.6.3 When the inspection report of the same number product of the light-burned magnesium oxide factory is used as the basis for acceptance, the demand party shall take samples from the light-burned magnesium oxide with the same number before shipment or at the time of delivery, and the two parties shall seal them together and keep them for three months; or entrust the supplier to take samples from the light-burned magnesium oxide with the same number, and seal them and keep them for three months.
Within three months, if the buyer has doubts about the quality of light-burned magnesium oxide, the supplier and buyer shall send the sealed samples to the provincial or provincial-level nationally recognized product quality supervision and inspection agency for arbitration inspection. 7 Packaging, marking, transportation and storage
7.1 Packaging
WB/T1019—2002
Light-burned magnesium oxide is packaged in woven bags lined with plastic film. The net content of each bag is 50kg, and shall not be less than 98% of the marked weight; the total weight of 20 bags randomly selected shall not be less than 1000kg. Other packaging forms shall be determined by negotiation between the supplier and the buyer, but the relevant bagging quality requirements must comply with the above principles.
7.2 Marking
The packaging bag of light-burned magnesium oxide should be clearly marked with: product name, number, brand, grade, net content, production license number, producer name and address, implementation standard number, production year, month and day. The product name and brand level should be printed in black on both sides of the packaging bag. 7.3 Transportation and storage
Light-burned magnesium oxide must not be exposed to moisture during transportation and storage. Products of different brands and grades should be stored and transported separately and must not be mixed. WB/T 1019-2002
A.1 Scope of application
Appendix A
(Normative Appendix)
Newly developed analytical method for active MgO content
This appendix specifies the requirements and activation procedures for the newly developed analytical method used to determine the active MgO content of light-burned magnesium oxide. A.2 The newly developed analytical method for active MgO content refers to the newly developed chemical analysis method.
A.3 The evaluation basis of the newly developed analytical method for active MgO content should be compared with the hydration method at the same time, and the average relative error within the scope of this standard shall not be greater than ±3%.
A.4 Basic requirements
When using the newly developed active MgO content analysis method to determine the active MgO content of light-burned magnesia, it must be fully tested and identified by the scientific research institutions designated by the China Federation of Logistics and Purchasing to prove that it can accurately determine the active MgO content, and formulate corresponding operating procedures, which must be approved by the China Federation of Logistics and Purchasing or industry associations. After application, it should be regularly compared with the hydration method. A.5 Information required for the approval of the newly developed active MgO content analysis method A.5.1 Feasibility study report of the newly developed active MgO content analysis method, which should include experimental research on the principle, instruments, reagents, operating steps, adaptability, repeatability, error analysis and comparison results with the hydration method. A.5.2 Trial summary report of the newly developed active MgO content analysis method. A.5.3 Operating procedures and preparation instructions for the newly developed active MgO content analysis method. WB/T1019-2002
Material Management of the People's Republic of China
Industry Standard
Light Burned Magnesium Oxide for Magnesium Products
WB/T1019-—2002
Published by China Standards Press
No. 16, Sanlihebei Street, Fuxingmenwai, Beijing
Postal Code: 100045
Tel: 68523946
68517548
Printed by Qinhuangdao Printing Factory of China Standards Press Published by Xinhua Bookstore Beijing Publishing House
Format 880×12301/16
First edition in November 2002
Sold by Xinhua Bookstores in various places
Printing sheet 3/4
Word count 14,000 words
First printing in November 2002
Print run 1-2500
Website www.bzcbs.com
Copyright reserved
Infringements must be investigated
Report phone number: (010) 685335333 When the inspection report of the same number product of the light-burned magnesium oxide factory is used as the acceptance basis, the buyer shall take a sample from the light-burned magnesium oxide with the same number before shipment or delivery, and the two parties shall seal it together and keep it for three months; or the supplier shall be entrusted to take a sample from the light-burned magnesium oxide with the same number and seal it for three months.
Within three months, if the buyer has doubts about the quality of the light-burned magnesium oxide, the supplier and the buyer shall send the sealed sample to the provincial or nationally recognized product quality supervision and inspection agency for arbitration inspection. 7 Packaging, marking, transportation and storage
7.1 Packaging
WB/T1019—2002
Light-burned magnesium oxide is packaged in woven bags lined with plastic film. The net content of each bag is 50kg, and shall not be less than 98% of the marked weight; the total weight of 20 bags randomly selected shall not be less than 1000kg. Other packaging forms shall be determined by negotiation between the supplier and the buyer, but the relevant bagging quality requirements must comply with the above principles.
7.2 Marking
The packaging bag of light-burned magnesium oxide should be clearly marked with: product name, number, brand, grade, net content, production license number, producer name and address, implementation standard number, production year, month and day. The product name and brand grade should be printed in black on both sides of the packaging bag. 7.3 Transportation and storage
Light-burned magnesium oxide should not be exposed to moisture during transportation and storage. Products of different brands and grades should be stored and transported separately and should not be mixed. WB/T 1019-2002
A.1 Scope of application
Appendix A
(Normative Appendix)
Newly developed analytical method for active MgO content
This appendix specifies the requirements and activation procedures for the newly developed analytical method for determining the active MgO content of light-burned magnesium oxide. A.2 The newly developed analytical method for active MgO content refers to the newly developed chemical analysis method.
A.3 The evaluation basis of the newly developed active MgO content analysis method should be compared with the hydration method at the same time. The average relative error within the scope of this standard shall not be greater than ±3%.
A.4 Basic requirements
When the newly developed active MgO content analysis method is used to determine the active MgO content of light-burned magnesia, it must be fully tested and identified by the scientific research institution designated by the China Federation of Logistics and Purchasing to prove that it can accurately determine the active MgO content, and formulate corresponding operating procedures, which shall be approved by the China Federation of Logistics and Purchasing or the industry association. After application, it should be compared with the hydration method regularly. A.5 Information required for the approval of the newly developed active MgO content analysis method A.5.1 Feasibility study report of the newly developed active MgO content analysis method, which should include experimental research on the principle, instrument, reagent, operation steps, adaptability, repeatability, error analysis and comparison results with the hydration method. A.5.2 Trial summary report of the newly developed active MgO content analysis method. A.5.3 The operating procedures and preparation instructions for the newly developed analysis method of active MgO content. WB/T1019-2002
Material Management of the People's Republic of China
Industry Standard
Light-burned magnesium oxide for magnesia products
WB/T1019-—2002
Published by China Standards Press
No. 16, Sanlihebei Street, Fuxingmenwai, Beijing
Postal Code: 100045
Tel: 68523946
68517548
Printed by Qinhuangdao Printing Factory of China Standards Press Published by Xinhua Bookstore Beijing Publishing House
Format 880×12301/16
First edition in November 2002
Sold by Xinhua Bookstores in various places
Printing sheet 3/4
Word count 14,000 words
First printing in November 2002
Print run 1-2500
Website www.bzcbs.com
Copyright reserved
Infringements must be investigated
Report phone number: (010) 685335333 When the inspection report of the same number product of the light-burned magnesium oxide factory is used as the acceptance basis, the buyer shall take a sample from the light-burned magnesium oxide with the same number before shipment or delivery, and the two parties shall seal it together and keep it for three months; or the supplier shall be entrusted to take a sample from the light-burned magnesium oxide with the same number and seal it for three months.
Within three months, if the buyer has doubts about the quality of the light-burned magnesium oxide, the supplier and the buyer shall send the sealed sample to the provincial or nationally recognized product quality supervision and inspection agency for arbitration inspection. 7 Packaging, marking, transportation and storage
7.1 Packaging
WB/T1019—2002
Light-burned magnesium oxide is packaged in woven bags lined with plastic film. The net content of each bag is 50kg, and shall not be less than 98% of the marked weight; the total weight of 20 bags randomly selected shall not be less than 1000kg. Other packaging forms shall be determined by negotiation between the supplier and the buyer, but the relevant bagging quality requirements must comply with the above principles.
7.2 Marking
The packaging bag of light-burned magnesium oxide should be clearly marked with: product name, number, brand, grade, net content, production license number, producer name and address, implementation standard number, production year, month and day. The product name and brand grade should be printed in black on both sides of the packaging bag. 7.3 Transportation and storage
Light-burned magnesium oxide should not be exposed to moisture during transportation and storage. Products of different brands and grades should be stored and transported separately and should not be mixed. WB/T 1019-2002
A.1 Scope of application
Appendix A
(Normative Appendix)
Newly developed analytical method for active MgO content
This appendix specifies the requirements and activation procedures for the newly developed analytical method for determining the active MgO content of light-burned magnesium oxide. A.2 The newly developed analytical method for active MgO content refers to the newly developed chemical analysis method.
A.3 The evaluation basis of the newly developed active MgO content analysis method should be compared with the hydration method at the same time. The average relative error within the scope of this standard shall not be greater than ±3%.
A.4 Basic requirements
When the newly developed active MgO content analysis method is used to determine the active MgO content of light-burned magnesia, it must be fully tested and identified by the scientific research institution designated by the China Federation of Logistics and Purchasing to prove that it can accurately determine the active MgO content, and formulate corresponding operating procedures, which shall be approved by the China Federation of Logistics and Purchasing or the industry association. After application, it should be compared with the hydration method regularly. A.5 Information required for the approval of the newly developed active MgO content analysis method A.5.1 Feasibility study report of the newly developed active MgO content analysis method, which should include experimental research on the principle, instrument, reagent, operation steps, adaptability, repeatability, error analysis and comparison results with the hydration method. A.5.2 Trial summary report of the newly developed active MgO content analysis method. A.5.3 The operating procedures and preparation instructions for the newly developed analysis method of active MgO content. WB/T1019-2002
Material Management of the People's Republic of China
Industry Standard
Light-burned magnesium oxide for magnesia products
WB/T1019-—2002
Published by China Standards Press
No. 16, Sanlihebei Street, Fuxingmenwai, Beijing
Postal Code: 100045
Tel: 68523946
68517548
Printed by Qinhuangdao Printing Factory of China Standards Press Published by Xinhua Bookstore Beijing Publishing House
Format 880×12301/16
First edition in November 2002
Sold by Xinhua Bookstores in various places
Printing sheet 3/4
Word count 14,000 words
First printing in November 2002
Print run 1-2500
Website www.bzcbs.com
Copyright reserved
Infringements must be investigated
Report phone number: (010) 68533533
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