This standard specifies the product classification, technical requirements, test methods, inspection rules, marking and packaging requirements of high-aluminum refractory products for resistance furnaces. This standard is applicable to products whose working temperature is lower than the load softening start temperature of each type. JB/T 3649.2-1994 Refractory products for resistance furnaces High-aluminum refractory products JB/T3649.2-1994 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T3649.2
1994-12-09
Ji Kui Ji
1995-06-01 Xiao Huang
Ji Kui Lu Wa Yi Xian
1 Purchase
JB/T3649.21994
JB3649.21984
This standard specifies the product classification, technical requirements, test methods, inspection rules, marking and packaging requirements of high-lead 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
GB 2997
GB3002
GB5072
GB5988
GB5989
Shapes and sizes of general refractory bricks
Test methods for apparent porosity, water absorption, bulk density and true porosity of dense shaped refractory productsTest methods for high-temperature flexural strength of refractory productsTest methods for room-temperature compressive strength of dense shaped refractory productsTest methods for linear changes of dense shaped refractory products after reburningTest methods for softening temperature under load of dense shaped refractory productsGB6900.1～6900.4Chemical analysis methods for clay and high-alumina refractoriesGB7321
GB7322
G B10324
GB10325
GB10326
YB2208
3 Product classification
3.1 Variety specifications
Specialization of dense shaped refractory productsTest method for refractories
Classification of refractory products
Rules for stacking, sampling, acceptance, storage and transportation of refractory productsInspection method for size, appearance and section of refractory productsTest method for thermal decay stability
Test method for high temperature compressive strength of refractory concreteThe products are divided into three varieties according to the percentage of Al,O, RLZ-65, RLZ-55 and RLZ-48. 3.2 The shape and size of the products shall comply with the provisions of GB2992. Products not specified in the provisions can be manufactured according to the drawings of the purchaser. 3.3 The model of the product shall be compiled according to the provisions, and the percentage of Al,O, shall be the main parameter in the model. The model of the product is composed of the following parts: RL
z OO-0
Enterprise code
Technical level code, [or]
Al, 0, percentage content
Indicates the product
Indicates high aluminum
Indicates used for resistance furnace
1994-12-09 Tumor
1995-06-01 Small
JB/T3649.2
3.4 ​​Products are divided into grades I and IV according to the allowable size deviation and appearance. 3.S 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
0.2 MPa Load reheating starting temperature
1500,3h
Reburning line change
14503,3h
Apparent porosity
Compressive strength at room temperature
RLZ-65
RLZ-5S
RLZ-48
4.2 The physical and chemical indicators of products in direct contact with Fe-Cr-Al resistor materials (such as peeling bricks, casing, etc.) and inner village products for salt furnaces shall meet the requirements of Table 1. In addition, the average content of Fe;0, shall not be greater than 1.5%, and there shall be no melt holes and slag corrosion on the contact surface with the resistor material and molten salt. 4.3 According to the requirements, the thermal shock stability test should be carried out on the products, and the high temperature compressive strength and flexural strength test should be carried out on the furnace bottom load-bearing parts and structural parts with special requirements. The assessment data should be proposed on the order form. The test results should be indicated in the product certificate. 4.4 The dimensional deviation and appearance of the products should comply with the provisions of Table 2. Table 2
Allowable deviation of size
Crack length
Dimension length
Crack angle\depth
Crack correction\depth
Melt weight
Weave width
>100~250
>250~400
>250~400
>0. 25 ~0. 50
>0. 50~1. 0
To be agreed by the supplier
To be agreed by the supply and demand parties
No restriction (not allowed to form a network)
No recommendation
JB/T3649.2
Difference, 1) The number of missing corners and edges on the same surface cannot exceed two. 2) The same crack cannot have two edges. Bricks and casings are not allowed to have cracks with a width exceeding 0.25 mⅢ. 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 products with a unit weight greater than 18 kg and less than 1 kg or special shapes, the technical requirements shall be agreed upon by the supply and demand forces. The fracture and layer cracking of the product shall comply with the provisions of Table 3. 4.
Section layer widthbzxZ.net
2 0.25~ 0.50
>0.50~1.0
No one has
Fraction length
Unlimited
4.8 The product shall be tested for visible pores, and the results shall be indicated in the product certificate, but it shall not be used as a delivery acceptance condition. 5 Test method
5.1 The sampling of products shall be in accordance with the provisions of Chapter 3 of GB10325. Take 3 pieces of each batch of products for physical and chemical inspection, and take 10 pieces 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 GB6900.1~6900.4. 5.4 The fire resistance test shall be in accordance with GB 7322. 5.5 The test of load softening temperature shall be in accordance with GB 5989. 5.6 The test of reburning line change shall be in accordance with GB 5988. 5.1 The test of apparent porosity shall be in accordance with GB2997. 5.8 The test of room temperature compressive strength shall be in accordance with GB 5072. 5.9 The test of high temperature compressive strength shall be in accordance with YB 2208. The test of high overflow flexural strength shall be in accordance with GB3002. 5.10 The test of thermal stability shall be in accordance with YB376. The appearance, size and cross-section inspection of the product shall be in accordance with the provisions of GB10326. Inspection rules
The inspection rules of the product shall be in accordance with the provisions of Chapter 3 of GB10325. Each batch of products (including small batches) shall be accompanied by the product certificate mark, packaging, transportation and storage
The product mark shall include the following items:
Manufacturer name,
Product name and model
Product weight,
Technical level mark:
Trademark,
Manufacturing date or batch number:
1.2 Packaging
The products shall be packed in boxes or tubes (filled with soft materials), tightened to prevent loosening and damage. 3 Transportation
According to Article 4.2 of GB10325.
7.4 Storage
JB/T3649.2
The stacking and storage of products shall comply with the provisions of Chapter 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 the Xi'an Electric Protection Research Institute of the Ministry of Machinery Industry. This standard was drafted by the Xi'an Electric Furnace Research Institute, 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 Cao Wenxiu, Zhu Suyuan, Wang Jusen, Bu Xibin, Ying Shengcai, 4
Jia Yikui
JB/T3649.2
Yan 880b1230
19XXXX Ridge
100044
Wan Duan X/X
Zhang JuxXX,XXX
19XX Collection XX Cabin
X is a flatfish
Germany pxXX.XX Wing
Polar bream
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