Silica brick is an acidic refractory material, which refers to a refractory product with a SiO2 content of more than 93%. It has good resistance to acid slag erosion. The softening temperature under load is as high as 1640-1670 °C, and the volume is relatively stable in long-term use at high temperature. According to the application, it can be divided into: silica brick for coke oven, silica brick for hot blast stove, silica brick for electric furnace, silica brick for glass kiln, etc. Therefore, the price of silica bricks should be determined according to the used parts and types of kilns. Zhengzhou Hongtai Refractories Co., Ltd. will provide you with reasonable product prices.
Silica bricks are mainly refractory materials composed of tridymite, cristobalite and a small amount of residual quartz and glass phases. The characteristics and process of silica bricks are closely related to the crystal transformation of SiO2. Therefore, the true specific gravity is an important quality indicator of silica bricks. The general requirement is below 2.38, and the silica brick should be below 2.35. The true specific gravity is small, which reflects that the amount of tridymite and cristobalite in the brick is large, and the amount of residual quartz is small, so the residual linear expansion is small, and the strength drop in use is also small.
The properties and process of silica bricks are closely related to the crystal transformation of SiO2. Therefore, the true specific gravity is an important quality indicator of silica bricks. The general requirement is below 2.38, and the silica brick should be below 2.35. The true specific gravity is small, which reflects that the amount of tridymite and cristobalite in the brick is large, and the amount of residual quartz is small, so the residual linear expansion is small, and the strength drop in use is also small.
The raw material for making silica bricks is silica. The higher the SiO2 content of the silica raw material, the higher the refractoriness. More harmful impurities are Al2O3, K2O, Na2O, etc., which seriously reduce the refractoriness of refractory products. Silica brick is made of silica with SiO2 content of not less than 96% as raw material, adding mineralizers (such as iron scale, lime milk) and binders (such as molasses, sulfite pulp waste liquid), after mixing, molding, drying, firing and other procedures.
If you have a demand for silica bricks, or have questions about the price of silica bricks, please consult Hongtai Refractories Co., Ltd. Our company has advanced product production equipment and can provide you with a large number of refractory materials. Hongtai Refractories looks forward to working with you. Work together to create a better tomorrow.
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