This standard specifies the classification, technical requirements, test methods, inspection rules, packaging, marking, transportation, storage and quality certificate of silica bricks. This standard applies to silica bricks with a unit weight of ≤40kg. GB/T 2608-2001 Silica Bricks GB/T2608-2001 Standard download decompression password: www.bzxz.net

1CS81.080
National Standard of the People's Republic of Chinabzxz.net
GB/T 2608—2001
Silica refractory bricks
2001-12-17 Issued
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
2002-05-01 Implementation
GB/T 2608—2001
This standard is a revision of GB/T 2608—1987 Silica Bricks. Compared with the previous version, this standard has the following main differences: The scope of application is expanded from unit weight 15kg to unit weight ≤40kg. The GZ-93 brand is cancelled and the GZ-96 brand is added. The refractoriness index is cancelled.
The true density, apparent porosity and room temperature strength index are adjusted. The size tolerance and appearance requirements of bricks are tightened. This standard replaces GB/T 2608-1987 from the date of implementation. This standard was proposed by the former State Metallurgical Industry Bureau. This standard is under the jurisdiction of the National Refractory Standardization Technical Committee. The drafting units of this standard are: Luoyang Refractory Group Co., Ltd., Zhengzhou Yuhua Enterprise Group Co., Ltd., Beijing Coking Plant Shanxi Xixiaoping Refractory Company, Shandong Boshan Beihekou Refractory Factory, Shandong Zibo Bridge Industrial Company Refractory Factory. The main drafters of this standard are Du Wenzhong, Zhang Xicheng, Hou Junjie, Zhang Huirong, Mu Kexiao, and Gao Xuzhu. 1 Scope
National Standard of the People's Republic of China
Silica refractory bricks
GB/T 2608--2001
Replaces GB/T 2608-1987
This standard specifies the classification, technical requirements, test methods, inspection regulations, packaging, marking, transportation, storage and quality certificate of silica bricks. This standard applies to silica bricks with a unit weight of ≤40 kg. 2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards are subject to revision, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T2992-1998 Shapes and dimensions of general-purpose refractory bricks GB/T2997-2000 Test methods for apparent porosity, water absorption, bulk density and true gas rate of dense shaped refractory products GB/T5071-1997 Test method for true density of refractory materials GB/T5072-1998 Test method for compressive strength of dense shaped refractory products at room temperature CB/T6901-1986 Chemical analysis method for siliceous refractory materials GB/T7321-1987 Sample preparation regulations for dense shaped refractory products GB/T10 325-2001 Rules for stacking, sampling, acceptance, storage and transportation of shaped refractory products GB/T10326-2001
Methods for inspecting the size, appearance and cross section of shaped refractory products GB/T16546-1996 Packaging, marking, transportation and storage of refractory products YB/T370-1995 Test method for softening temperature under load of refractory products (non-differential-heating method) YB/T40t7-1991 Shape and size of refractory products for glass melting furnaces Silica bricks 3 Classification, shape and size
3. 1 Bricks are divided into three grades: GZ-96, GZ 95 and GZ.94 according to physical and chemical indicators. 3.2 The shape and size of bricks shall comply with the provisions of GB/T2992.YB/T4017, and can also be carried out according to user requirements. 4 Technical requirements
4. 1 The physical and chemical indicators of bricks shall comply with the provisions of Table 1. 4.2 The allowable deviation of brick size and appearance shall comply with the provisions of Table 2. 4.3 When a crack crosses an edge, it is only allowed to cross one edge, and the cracks across the edges are not combined for calculation. 4.4 Cracks on the brick parallel to the working surface: The length shall not exceed one fifth of the length of the edge shared by the crack surface and the working surface 4.5 Layer cracks:
Bricks with a unit weight of ≤20kg shall be assessed according to the working surface crack index; bricks with a unit weight of >20 kg shall be assessed according to the non-working surface crack index. Approved by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China on December 17, 2001, and implemented on May 1, 2002
w(Si02)/%
(Fe20,)/%
Apparent porosity/%
Compressive strength at room temperature/MPa
0.2MPaSoftening start temperature under load
Unit weight <20kg
Unit weight ≥20kg
True density/(g/em)
Note: The number chains in brackets are indicators for hand-formed bricks. Table 2
Allowable deviation of size
Size≤100
Size101～350
Size≥350
Length≤300
Length>300
Relative edge difference
Length of missing corner and edge
(a+b+e)
Diameter of melt hole
Crack length
Test method
Working surface
Working surface
Working surface
Width0.20
Width0.110.2
Width 0.26~-0.5
Width>0.5
GB/T2608—2001
Physical and chemical indicators of bricks
22(24)
35(30)
30(25)
Allowable deviation and appearance of brick size
Unit weight<20kg
4 (1 piece)
No limit
Working surface
Non-working surface
Working surface
Non-working surface
The inspection and sample preparation of bricks shall be carried out in accordance with GB/T7321. 5.2The determination of w(SiO) and w(Fe,O,) shall be carried out in accordance with GB/T6901. 5.3The inspection of load softening temperature shall be carried out in accordance with YB/T370. 5.4
The inspection of apparent porosity shall be carried out in accordance with GB/T2997. 5.5
The inspection of compressive strength at room temperature shall be carried out in accordance with GB/T5072. 2
Not allowed
Not allowed
(Bonded silica 1620)
Unit weight 2030kg
No limit
Not recommended
Unit weight>30kg
No limit
Not recommended
5.6The inspection of true density shall be carried out in accordance with GB/T5071. GB/T2608—2001
5.7The inspection of brick appearance, size and section shall be carried out in accordance with GB/T 10326. 6 Inspection rules
Sampling and acceptance of bricks shall be carried out in accordance with GB/T 10325. 7 Packaging, marking, transportation, storage and quality certificate 7.1 The packaging, marking, transportation and storage of bricks shall be carried out in accordance with GB/T16546 7.2 When the size difference between the big and small heads of wedge-shaped bricks is ≤5 mm, a clear mark shall be made on the big head of the brick. 7.3 When bricks are shipped, they shall be accompanied by a quality certificate stating the name of the supplier, the name of the buyer, the date of shipment, the Yutong number, the product name, the standard number and brand, the brick number and physical and chemical indicators. GB/T 2608-2001
National Standard of the People's Republic of China
GB/T 2608--2001
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