Silicon Refractory Brick

Silicon refractory bricks refer to refractory products with a SiO₂ content of more than 93%. Silica bricks are made from silica with a SiO₂ content of not less than 96% as raw material, adding mineralizing agents and binding agents through mixing, shaping, drying, firing, and other processes. The higher the SiO₂ content in the silica raw material, the higher the refractoriness of the product.

Technical indicators of silicon refractory bricks

Item		BG-94	BG-95	BG-96A	BG-97B
Chemical Composition %	SiO₂	≥94	≥95	≥96	≥96
	Fe₂O₃	≤1.5	≤1.5	≤0.8	≤0.7
	Al₂O₃+2(K₂O+Na₂O)		≤1.0	≤0.5	≤0.7
Refractoriness ℃		1710	1710	1710	1710
Apparent Porosity %		≤22	≤21	≤21	≤21
Bulk Density g/cm³		≥1.8	≥1.8	≥1.87	≥1.8
True Density g/cm³		≤2.38	≤2.38	≤2.34	≤2.34
Cold Crushing Strength Mpa		≥24.5	≥29.4	≥35	≥35
Refractoriness Under Load (0.2MPa)T0.6℃		≥1630	≥1650	≥1680	≥1680
Permanent Linear Change On Reheating % 1500℃X2h		0~﹢0.3	0~﹢0.3	0~﹢0.3	0~﹢0.3
Thermal Conductivity W/m.k 1000℃		1.74	1.74	1.44	1.44
20-1000℃ Thermal Expansion 10-6/℃		1.25	1.25	1.25	1.25

Characteristics of silica bricks

Silica bricks are acidic refractory materials and have strong resistance to erosion by acidic slag or acidic melt. However, they have poor resistance to erosion by alkaline substances and are easily destroyed by oxides such as Al₂0₃, K₂0, Na₂0, etc., and are resistant to CaO, Oxides such as FeO and Fe₂O₃ have good resistance.

Where are silica bricks used in high-temperature kilns?

Silicon refractory bricks are now mainly used in furnaces such as the partition walls of the carbonization chamber and combustion chamber of coke ovens, the regenerators and slag chambers of steel-making open-hearth furnaces, soaking furnaces, refractory materials in glass melting furnaces, and ceramic firing kilns. vaults and other load-bearing parts. Also used in high-temperature load-bearing parts of hot blast furnaces and acidic open-hearth furnace tops.

Rongsheng supports customized design

silicon refractory bricks delivery — silicon refractory brick delivery

To meet the needs of different industries and equipment, we provide a variety of specifications and models of silica bricks, which can be customized for design. Whether used as high-temperature furnace walls, linings, or other refractory components, silica bricks can provide the best solution to ensure the efficient operation of equipment under various process conditions.