Silica heat-proof firebrick
A heat-insulating refractory brick and silica technology, applied in the field of refractory materials, can solve the problems of low load deformation temperature, high thermal conductivity, easy shrinkage, etc., and achieve low iron content, high compressive strength, and good thermal stability. Effect
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Embodiment 1
[0014] Silica heat insulating refractory bricks, made of the following raw materials in weight percentages, SiO 2 The content is 97.5% of silica fine powder 81%. The silica fine powder is crushed by five sets of silica. SiO 2 19% of perlite with a content of 83%, plus the following auxiliary materials accounting for the total weight of the above main raw materials: 0.45% of iron scale powder, the content of ferrous oxide in iron scale powder is not less than 65%, 0.9% of cement, and 6.5% of milk of lime , its specific gravity is 1.24g / cm 3 , pulp 1.95%, its specific gravity is 1.20g / cm 3 , the pH is 4; the silica fine powder is composed of two parts, wherein silica particles with a particle size range of 1-0.088mm account for 5%, and particles with a particle size range of <0.088mm account for 95%;
[0015] Add silica fine powder and perlite into the wet mill in proportion, then add iron scale powder and cement for dry milling for 1 minute, add water accounting for 1.8% of t...
Embodiment 2
[0017] Silica heat insulating refractory bricks, made of the following raw materials in weight percentages, SiO 2 85% of silica fine powder with a content of 98%, said silica fine powder is crushed from five sets of silica, SiO 2 15% of perlite with a content of 85%, plus the following auxiliary materials accounting for the total weight of the above main raw materials: 0.55% of iron scale powder, the content of ferrous oxide in iron scale powder is not less than 65%, 1.1% of cement, 7.5% of milk of lime , its specific gravity is 1.28g / cm 3 , pulp 2.2%, its specific gravity is 1.24g / cm 3 , the pH is 5; the silica fine powder is composed of two parts, wherein silica particles with a particle size range of 1-0.088mm account for 15%, and particles with a particle size range of <0.088mm account for 85%;
[0018] Add silica fine powder and perlite into the wet mill in proportion, then add iron scale powder and cement for dry milling for 2 minutes, add water accounting for 2.2% of ...
Embodiment 3
[0020] Silica heat insulating refractory bricks, made of the following raw materials in weight percentages, SiO 2 83% silica fine powder with a content of 98.5%, the silica fine powder is crushed by five sets of silica, SiO 2 17% of perlite with a content of 87%, plus the following auxiliary materials accounting for the total weight of the above-mentioned main raw materials: 0.50% of iron scale powder, the content of ferrous oxide in iron scale powder is not less than 65%, 1.0% of cement, and 7.0% of milk of lime , its specific gravity is 1.25g / cm 3 , pulp 2.0%, its specific gravity is 1.23g / cm 3 , the pH is 4; the silica fine powder is composed of two parts, wherein silica particles with a particle size range of 1-0.088mm account for 10%, and particles with a particle size range of <0.088mm account for 90%;
[0021] Add silica fine powder and perlite in proportion to wet milling, then add iron scale powder and cement for dry milling for 1 minute, add water accounting for 2....
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Abstract
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