Low SiC, ZrO2 refractory castable
For a long time, it is generally believed that the higher the content of SiC in the castable, the stronger the alkali resistance.
General correspondence between SiC content and crust resistance:
SiC content 15-25%  Resistance to skin resistance  third class
SiC content 25-40%  Resistance to skin resistance secondary
SiC content  ≥40%    Resistance to skin resistance senior grade
In accordance with the above requirements, the firing system of harmful elements in high temperature and alkali erosion and abrasion of the heavier parts of clinker,Such as the cooler inlet,The configuration of the SiC content is up to 60%-70%，In the production process, in addition to the advantages of corrosion resistance,There are many defectssuch as high price and excessive thermal conductivity,It was also found that the content of SiC was not linear with alkali resistance.
Refractory castable and refractory brick compared with the following characteristics:
First porosity is higher
Maintenance drying and production after use ,Porosity increased to 18%-25%.
Another feature
Pore size is small, the pore of low cement refractory castable is 0.5-1.5um,The pore size of refractory brick is 3-5 times of the above data.In other words, low cement SiC castable has the characteristics of high porosity and small pore size.The main effect of SiC Refractory Castable against crust is SiC in refractory castables,In high temperature conditions, SiC oxidation and water vapor, resulting in SiO2 alkali resistant crusts,Reaction produces Co, H2 escapes through fine pores,During this process, the oxidation rate increased more than 10 times.SiO2 the crust material sulfur spurrite components in destruction, to generate C2S, and stone easy crust sulfur ash calcium, generate K2SO4 block skin. End The higher the content of SiC in the brick, the more viscous layer of the surface of the refractory castable lining, which prevented the gas from the micro pore diameter, slowed down the formation of alkali resistant SiO2, not conducive to alkali corrosion.This indicates that the content of SiC is not possible anti scaling,In the production process of refractory castable cement clinker, the content of SiC should be reduced as far as possible to meet the anti crust requirement of each part.
Taurus Refractory ramming mass Factory mainly engaged in professional manufacturer of development, production and sales of the refractory mixture such as melting copper, aluminum and zinc furnace lining. And supply castable refractory for copper smelting, ramming mass for molten copper,fireclay for copper smelting ,and so on.
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