This standard specifies the product classification, technical requirements, test methods, inspection rules, marking and packaging requirements of clay refractory products for resistance furnaces (hereinafter referred to as products). This standard is applicable to products whose working temperature is lower than the load softening start temperature of each type. JB/T 3649.1-1994 Refractory products for resistance furnaces Clay refractory products JB/T3649.1-1994 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T3649.1
1994-12-09
Ji Kui Ji
1995-06-01 Xiao Huang
Ji Jia Xin Kui Lu Wa Peng Dao
1 Gu Jiang
JB/T3649.11994
JB3649.11984
This standard specifies the product classification, technical requirements, test methods, inspection rules, marking and packaging requirements of clay refractory products for resistance furnaces (hereinafter referred to as products).
This standard applies to products whose working temperature is lower than the load softening start temperature of each variety. 2 Reference standards
GB 2992
GB2997
GB5072
GB 5988
GB 5989
Shapes and sizes of general-purpose refractories
Test methods for apparent porosity, water absorption, bulk density and true porosity of dense shaped refractory products Test methods for compressive strength of dense shaped refractory products at room temperature Test methods for linear changes of dense shaped refractory products after reburning Test methods for softening temperature under load of dense shaped refractory products GB 6900. 1~6900. 4
Chemical analysis methods for clay and high-alumina refractories GB 7321
GB7322
GB10324
CR 10325
GB10326
3 Product classification
3. 1 Variety specifications
Specialization regulations for the test of dense shaped refractory productsRefractoriness test methods for refractory materials
Classification definition of refractory products
Rules for stacking, joint sampling, acceptance, warranty and transportation of refractory productsInspection methods for the size, appearance and fracture of refractory productsTest methods for thermal stability
Products are divided into three varieties: RNZ-40, RNZ-35 and RNZ-30 according to the percentage of A12O. 3.2 The shape and size of the product shall comply with the provisions of GB2992. Products not specified in the regulations can be manufactured according to the drawings of the purchaser. 3.3 The model of the product shall be compiled in accordance with the following provisions, and the percentage of A12O shall be used as the main parameter in the model. The model of the product consists of the following parts: RNZ
Enterprise code
Technical level code, [or 1
N.0, percentage
indicates the product
indicates claywww.bzxz.net
indicates for resistance furnace
1994-12-09 tumor
1995-06-01 small cable
JB/T3649.1
3.4 ​​The system is divided into 1 and 2 grades according to the allowable deviation of size and appearance. 3.5 The classification of products shall comply with the provisions of GB10324, 4 Technical requirements
The physical and chemical indicators of the products shall comply with the provisions of Table 1. 4.1
Refractory degree,
0.2MPe Load softening starting degree C
Remelting line change
Time h
Apparent porosity, %,≤
Normal temperature positive strength, Mra
RNZ-40
—0. 5~ 0
4.2According to the requirements of the purchaser, the product shall be subjected to thermal shock stability test and the result shall be indicated in the product certificate. 4.3 The allowable deviation of the size and appearance of the product shall comply with the provisions of Table 2. Table 2
Allowable deviation of size
Dimension length
Deepness of notch
Diameter of melt hole
Crack length
Length (one floor), %
Crack width
>1c0～250
>250～~400
>250~400
>0. 25~0,50
>0. 5~1. 0
Previous: 1) The missing corners and edges cannot exceed two in the same working surface, 2) The same crack cannot cross two hinges,
RNZ-30
Agreed by the supply and demand parties
Agreed by the supply and demand parties
No restrictions, not allowed to form a network)
No
No
JB/T3649.1
Note, 1) The missing corners and edges cannot exceed two in the same working surface, 2) The same crack cannot cross two hinges,
RNZ-30
Agreed by the supply and demand parties
Agreed by the supply and demand parties
No restrictions, not allowed to form a network)
No
No
JB/T3649.1
Note, 1) The missing corners and edges cannot exceed two in the same working surface, Two places. 1994
2) The same crack cannot cross two. Bricks and casings are not difficult to have crack effects with a degree of more than 0.25 blood pull. 4.5 For products with special requirements for thermal shock stability, the requirements for black and red hearts should be indicated on the order form. 4.6 For single-weight products of less than 18kg or special-sized products, the technical requirements shall be agreed upon by the supply and demand parties. 4.7 The cross-sectional cracking of the product shall comply with the provisions of Table 3. Table 3
Crack width of the cross section
>0, 25 ~0, 50
>0, 50 ~1. 0
Not difficult to have
Sectional crack length
Unlimited value
4.8 The apparent porosity of the product should be measured, and the result should be indicated in the product certificate, but it is not a condition for delivery and acceptance. 5 Test method
5.1 The sampling of products shall be in accordance with the provisions of Chapter 3 of GB10325. For each batch of products, 3 pieces shall be taken for physical and chemical inspection, and 10 pieces shall be taken for appearance inspection. 5.2 The cutting of product samples shall be in accordance with GB 7321. 5. 3. Chemical analysis shall be in accordance with GB 6900. 1~6900. 4. 5.4 The refractoriness test shall be in accordance with GB7322. 5.5
The load softening temperature test shall be in accordance with GB5989. The test of reburning line change shall be in accordance with CB 5988. The inspection of apparent porosity shall be in accordance with GB2997. The inspection of compressive strength at room temperature shall be in accordance with GB5072. The inspection of compressive strength at high temperature shall be in accordance with YB2208. 5. 10
The inspection of high-humidity flexural strength shall be in accordance with GB3002. The inspection of thermal shock stability shall be in accordance with YB376, and the inspection of the appearance, size and section of the product shall be in accordance with GB10326. Inspection rules
The inspection rules of products shall be in accordance with Chapter 3 of GB10325. 6.2
Each batch of products (including small batches) shall be accompanied by a product certificate when it is shipped. 7 Marking, packaging, transportation and storage
7.1 Marking
The product marking shall include the following items:
Manufacturer name
Product name and model:
Product weight?
d. Technical grade delete mark +
late. Trademark
Date of manufacture or batch number.
7.2 Packaging
Products are packed in boxes or baskets (filled with soft materials), tightly packed to prevent loosening and breakage. 7.3 Transportation
According to Article 4.2 of GB10325.
7.4 Storage
JB/T3649.1
The stacking and storage of products shall be in accordance with the provisions of Section 2 and Article 4.1 of GB10325. Additional remarks:
This standard is proposed by the National Technical Committee for Standardization of Industrial Electric Heating Equipment. This standard is under the jurisdiction of Xi'an Electric Furnace Research Institute of the Ministry of Machinery Industry. This standard is drafted by Xi'an Electric Furnace Research Institute, Shanghai Electric Furnace Refractory Material Factory, Xuanxing Chuanbu Refractory Electric Porcelain Factory No. 2, and Dongtai Refractory Equipment Factory.
The main drafters of this standard are Cao Wenxiu, Zhu Suyuan, Wang Jusen, Bu Xibin, Ying Shengcai 4
Xin Kui Lu
JB/T3649.1
Yan 880b1230
19XXXX Ridge
100044
Wanduan X/X
Zhang Ju XXX.XXX
19XX Collection XX Cabin
X is a flatfish
De pxXX.XX Wing
Xian Ji Lotus Snapper
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