This standard specifies the product classification, technical requirements, test methods, inspection rules, marking and packaging requirements of anti-carburization refractory products for resistance furnaces. JB/T 3649.6-1994 Refractory products for resistance furnaces Anti-carburization refractory products JB/T3649.6-1994 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T3649.6
1994-12-09
Jia Kui Ji
1995-06-01 Xiao Huang
Ji Jia Xie Kui Lu Wa Yi Dao
JB/T3649.61994
This standard specifies the product classification, technical requirements, test methods, inspection rules, marking and packaging requirements of anti-carburization refractory products (hereinafter referred to as products) for resistance furnaces.
This standard applies to products whose working temperature is lower than the reburning line change temperature of each variety. 2 Reference standards
GB 2992
GB2998
GB3994
GB 3997. 1
GB 3997. 2
CB5988
GB5990
Shapes and dimensions of general pre-fire bricks
Test method for bulk density and true porosity of shaped insulating refractory products Earthen insulating refractory bricks
Test method for burning line change of shaped insulating refractory products Test method for temperature compressive strength of shaped insulating refractory products Test method for line change of dense shaped refractory products after reburning Test method for thermal conductivity of shaped insulating refractory products (hot wire method) GB 6900.1~6900. 4
Chemical analysis methods for clay and high-alumina refractory materials GE7321
GB10325
GE 10326
3Product classification
Variety specifications
Sample preparation regulations for dense shaped refractory products testing Rules for stacking, sampling, acceptance, storage and transportation of refractory products Methods for inspecting the size, appearance and cross-section of refractory products Products are divided into six varieties according to density: RKZ2.0, RKZ-1.3, RKZ-1.0, RK2-0.8, RKZ-0.6 and RKZ-0.4.
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 density shall be used as the main parameter in the model. The model of the product consists of the following parts. R z
Enterprise code
Technical level code, [or]
Indicates product density, g/cm
Indicates product
Indicates paint-resistant carbon
Indicates used for resistance furnace
1994-12-09 Tumor
1995-06-01 Small cable
JB/T3649.6
3. 4 Products are divided into Class I and Class I according to the allowable size deviation and appearance. 3.5 The classification of products shall be in accordance with Article 1.3 of GB3994. 4 Technical requirements
The physical and chemical indicators of the products shall comply with the requirements of Table 1. Table 1
Density gierin
Reburning line change
Compressive strength at room temperature,
Thermal conductivity
Time reading b
Average temperature, ℃
W/(m·K)
-0. 5 ~ 0
1. 3±0. 05
The size tolerance and appearance of the product shall comply with the provisions of Table 2, Table 2
Size tolerance
Dimension length
Deepness of notch
Crack length\
Length (one floor), %
Crack width
>100~250
≥25~-400
≥250-400
>0. 25~0. 50
20. 50~1. 0
Note: 1) The number of missing parts and missing parts on the same working surface shall not exceed two places, 2) The same workpiece shall not span two parts,
The cross-sectional layering of the product shall comply with the provisions of Table 3. 4.3
The product shall not have a black core.
The product shall not have a melting hole.
1.0±0.05
0.8±0.05
350±25
0. 6±0. 05
To be determined by both parties
To be determined by both parties
0. 4±0.05
Unlimited (not difficult to form a network)
No cross-sectional layering width
>0. 50--2. 00
Test method
JB/T3649.6
Sectional spalling length
≤20(for RKZ-0.4,≤50)
≤30(for RK2-0.1, ≤60)
Product sampling shall be in accordance with the provisions of Chapter 3 of GB10325. Take 10 pieces of each batch of products for physical and chemical inspection, take 10 pieces for appearance inspection, and the cutting of product samples shall be in accordance with the provisions of GB7321. Chemical analysis shall be in accordance with the provisions of GB6900.1~6900.4. 5.3
5.4 Density inspection shall be in accordance with the provisions of GB2998. 5.5 Inspection of reburning line change shall be in accordance with the provisions of GB3997.1 and GB5988: 5.6 Inspection of room temperature compressive strength shall be in accordance with the provisions of G133997.2. 5.7 Determination of thermal conductivity shall be in accordance with the provisions of GB5990. 5. 8
The inspection of the appearance, size and cross section of the product shall be in accordance with the provisions of GB10326. Inspection rules
6.1 The inspection rules of the product shall be in accordance with the provisions of Chapter 4 of GB3994 (NC is changed to RKZ). 6.2 Each batch of products (including small batches) shall be accompanied by a product certificate when leaving the factory. Marking, packaging, transportation and storage
The product marking shall include the following items:
Manufacturer name
Product name and model:
Product weight;
Technical level mark
Trademark,
Manufacturing date or batch number.
7.2 Packaging
In accordance with Article 5.2 of GB3994.
7.3 Transportation
In accordance with Article 5.3 of GB3994.
7.4 Storage
According to Article 5.4 of GB3994.
Additional Notes:
This standard was proposed by the National Technical Committee for Standardization of Industrial Electric Heating Equipment. This standard is under the jurisdiction of the Xi'an Electric Protection Research Institute of the Ministry of Machinery Industry. This standard was issued by the Xi'an Electric Furnace Research Institute, and was drafted by the Shanghai Electric Furnace Refractory Material Factory, Yixing Chuanbu Refractory Electric Porcelain Factory No. 2, and Dongtai Refractory Equipment Factory.
The main drafters of this standard are Mi Jinyuan, Cao Wenxiu, Wang Jusen, Tang Shuangxi, and Ying Shengcai. 3
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