Industry standard for silica for refractory materials
2025-01-15
The silica industry standard for refractory materials (YB/T5268-2014) is shown in Table 1, and the particle size requirements for silica products are shown in Table 2.
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Table 1 Physical and chemical indexes of silica for refractory materials (YB/T5268-2014) |
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Brand |
Chemical composition (mass fraction)/% |
Refractoriness/℃ |
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SiO2 |
A12O3 |
Fe2O3 |
Cr2O3 |
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GSN99A |
>99.0 |
60.25 |
<0.5 |
<0.15 |
1740 |
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GSN99B |
>99.0 |
0.30 |
<0.5 |
0.15 |
1740 |
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GSN98 |
>98.0 |
<0.50 |
<0.8 |
<0.20 |
1740 |
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GSN97 |
>97.0 |
<1.00 |
<1.0 |
<0.30 |
1720 |
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GSN96 |
>96.0 |
<1.30 |
<1.3 |
40.40 |
1700 |
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Note :1. “GSN” in the table is the initials of “Silishi Nai”. 2. Waste rock, breccia silica, wind fossil should not be mixed into the product, and foreign impurities should not be mixed. |
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Table 2 Particle size requirements of silica products |
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Size range/mm |
Maximum grain size/mm |
Allowable fluctuation range/% |
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Floor |
Upper limit |
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20~40 |
50 |
10 |
8 |
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40~60 |
70 |
10 |
8 |
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60~120 |
140 |
10 |
5 |
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120~160 |
170 |
10 |
8 |
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160~250 |
260 |
8 |
6 |
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