This standard specifies the terminology, product classification, technical requirements, test methods, inspection rules and marking, packaging, transportation and storage of high-alumina saggers. This standard applies to saggers with high-alumina bauxite clinker as aggregate, clay as binder, silicon dioxide content not more than 30%, aluminum oxide content not less than 58%, mullite and corundum as main mineral phases, used for firing daily-use ceramic products. QB/T 1682-1993 High-alumina saggers QB/T1682-1993 Standard download decompression password: www.bzxz.net

Light Industry Standard of the People's Republic of China
High Alumina Sagger
1 Subject Content and Scope of Application
QB/T1682—1993
This standard specifies the terminology, product classification, technical requirements, test methods, inspection rules and marking, packaging, transportation and storage of high alumina sagger. This standard applies to saggers with high alumina clinker as aggregate, clay as binder, silicon dioxide content not more than 30%, aluminum oxide content not less than 58%, mullite and corundum as main mineral phases, used for firing daily-use ceramic products. 2 Reference standards
GB/T2828 Sampling procedures and sampling tables for batch inspection (applicable to inspection of continuous batches)GB/T 2829
GB/T 2997
GB/T 3300
GB/T 3301
Test methods for apparent porosity, water absorption, bulk density and true porosity of dense shaped refractory productsTest methods for deformation of daily-use ceramics
Methods for determination of volume, diameter error, height error, weight error and defect size of daily-use ceramicsTerminology for defects in daily-use ceramics
GB/T 3303
GB/T 4741
GB/T 5988
GB/T 7322
QB/T 1321
QB/T 1683
Determination method of bending strength of daily-use ceramics
Test method of linear change of dense shaped refractory products after reburning Test method of refractories
Determination method of average linear thermal expansion coefficient of ceramic materials Aluminum-silicon-magnesium sagger
Test method of softening temperature under load
YB/T 370
3 Terms
Defect terms shall be implemented in accordance with Chapter 3 of QB/T1683. 4 Product classification
4.1 According to the use of the product, it is divided into bowls, plates and dishes, pots, cups, bottles and other types of bowls. 4.2 According to the specifications of the product, it is divided into small (diameter less than 240mm), medium (diameter between 240~340mm) and large (diameter greater than 340mm).
5 Technical requirements
5.1 The appearance quality of the bowl shall meet the requirements of Table 1. Table 1
Defect name
Product specifications approved by the Ministry of Light Industry of the People's Republic of China on March 28, 1993
Allowable range
Not obvious
Not serious
Implemented on October 1, 1993
Defect name
Underburning, cracking, notch
Bottom unevenness
Thickness difference
Length+mm
Diameter, mm
QB/T 1682—1993
Table 1 (end)
Product specifications
Allowable range
Not allowed
Not more than 0.5% of the diameter
Not more than 1. 0%
Not more than 1.5% of the diameter
cmThe length of the cracks on the wall and the edge of the mouth shall not exceed 30
The length of the cracks on the wall and the mouth of the sagger shall not exceed 40
The length of the cracks on the wall and the edge of the mouth shall not exceed 60
The bottom is not allowed, and cracks with a width greater than 0.5 in other parts are not allowedSmall
Other parts are not more than 5, limited to 3
Other parts are not more than 5. Limited to 4
Other parts are not more than 5, limited to 5
The contact surface between the inner surface and the edge of the sagger and the bottom (shoulder) is not allowed of various types
5.2 The physical performance indicators of the sagger shall comply with the requirements of Table 2. Table 2
Indicator value
Indicator value
Flexural strength at room temperature, MPa
Thermal stability (expressed as strength
retention rate).%
Apparent porosity, %
Linear expansion coefficient at 800℃, 1/℃
≤4.8×10-6
5.3 The errors in the diameter, height and weight of the sagger shall comply with the requirements of Table 3. Table 3
Diameter error
Height error
Weight error
Diameter not more than 5, depth not more than 2
Recalcined line change, %
Refractory, ℃
≥1700
Product specifications
Volume density g/cm
Refractoriness under load.C
≥1400
Allowable range
HYKAONKA
6 Test method
6.1 Diameter deformation measurement shall be carried out in accordance with GB/T3300. QB/T16821993
6.2 Thickness difference shall be measured with a vernier caliper with an accuracy of 0.05mm. 6.3 Diameter error, height error and weight error shall be measured in accordance with GB/T3301. 6.4 The bottom roughness shall be determined in accordance with Appendix B (Supplement) of B/T1683. 6.5 The normal bending strength shall be determined in accordance with CB/T4741. The sample preparation shall be in accordance with Appendix C (Supplement) of QB/T1683. 6.6 The apparent porosity and bulk density shall be determined in accordance with GB/T2997. 6.7 The reburning linear change shall be determined in accordance with GB/T5988. 6.8 The thermal stability shall be determined in accordance with Appendix A (Supplement) of QB/T1683. 6.9 The linear expansion coefficient shall be determined in accordance with QB/T1321. 6.10 The refractoriness shall be determined in accordance with GB/T7322. 6.11 The softening temperature under load shall be determined in accordance with YB/T370. The sample preparation shall be in accordance with Appendix C (Supplement) of QB/T1683. 7 Inspection rules
Product inspection is divided into factory inspection and type inspection, and the number of unqualified products per unit (piece method) is used for inspection. Each batch of products must be inspected and qualified by the manufacturer before it can be shipped out of the factory. When leaving the factory, it must be accompanied by documents proving the quality of the products. 7.1 Delivery inspection
7.1.1 Delivery inspection items are the contents specified in 5.1 and 5.3 of this standard. 7.1.2 Delivery inspection is carried out in accordance with the provisions of GB/T2828. The classification of unqualified items, qualified quality level, inspection level and sampling plan of each inspection item are shown in Table 4.
Inspection items
Diameter error
Height error
Weight error
No classification
Qualified quality level
7.1.3 Formation of product batches: The inspected products are formed into batches according to varieties and specifications. Inspection list
General inspection level 1
7.1.4 Samples are randomly drawn.
7.1.5 If any of the items in the inspection is unqualified, the product is judged to be unqualified. Sampling plan
Start with a normal inspection and transfer the sample according to the familiar transfer rules.1.6 If the batch is judged to be unqualified after inspection, the batch of products can be submitted for inspection again after rework by the delivery party. 441
Type inspection
QB/T1682--1993
Type inspection is carried out every six months. Type inspection must also be carried out in the following circumstances. When the product raw material formula is changed;
When the production process method is changed and may affect the product performance; when the production is stopped for more than 6 months and then resumed;
When an accident occurs in the production process: when there is a large difference between the factory inspection result and the last type inspection result; when the superior quality supervision agency proposes a type inspection requirement. 7.2.2 The type inspection items are all the contents of the technical requirements of this standard. 7.2.3
The samples for type inspection shall be drawn from the products that have passed the inspection of the manufacturer's inspection department. 7.2.4 Type inspection shall be carried out in accordance with the provisions of GB/T2829. The classification of unqualified products, unqualified quality levels, discrimination levels and sampling plans for each inspection purpose are shown in Table 5.
Inspection itemswwW.bzxz.Net
Diameter error
High combustion error
Re-shooting error
Reburning line change
Apparent porosity
Bulk density
Refractory
Linear expansion coefficient
Refractoriness under load
Compression strength at room temperature
Hot boiling stability
Unqualified classification
Unqualified quantity level
Xiangbie Chengping
7.2.5 If any of the inspection items is unqualified, the product will be judged as unqualified in the type inspection. 442
Sampling plan
Group quantity
n 2 2— 2
m 2 #2 2
(Every 6 grain test strips
composes a sample?
2 2 n2 - 2
(Every green root test strip
composes a sample)
8Marking, packaging, transportation, storage
Each product must be marked by the manufacturing unit. 8.1
QB/T16821993
8.2 Products must be packaged before leaving the factory and accompanied by product certificates. 8.3 Product storage rooms should be kept dry and clean, and products are strictly prohibited from being exposed to rain and moisture. Additional notes:
This standard was proposed by the Quality Standards Department of the Ministry of Light Industry. This standard is under the jurisdiction of the National Ceramic Standardization Center. This standard was drafted by the Ceramic Industry Science Research Institute of the Ministry of Light Industry. The main drafters of this standard are Wang Qingling, Zheng Kedun, and Huang Cai'e. 443
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