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Aluminum-magnesia-carbon brick refers to a refractory product made of super high alumina bauxite or corundum sand, magnesia sand and flaky graphite. Magnesia-carbon bricks, magnesia-magnesium carbon bricks for electric furnaces are lining fire products made of special high-alumina bauxite or corundum sand, magnesia sand and flaky graphite. It is characterized in that it has the advantages of high corrosion resistance and non-flaking due to carbon content at high temperature, and also has the advantage of exhibiting a high residual linear expansion ratio due to heat generation of spinel during use, thereby becoming a new development quality. Lined with bricks.
The aluminum-magnesia carbon brick is characterized in that it has the advantages of high corrosion resistance and low peeling property due to carbon content at high temperature, and also has the advantage of exhibiting a high residual linear expansion ratio due to heat generation of spinel during use, thereby becoming Newly developed high quality lining bricks. Containing Al2O3 60% ~ 69%, MgO 7% ~ 14%, C 5% ~ 12%. It has good slag corrosion resistance and thermal shock resistance, and has a slight amount of reburning expansion.
The aluminum-magnesium carbon brick has the advantages of anti-erosion, anti-flaking, balanced erosion, safe use, less slag adhering to steel, and easy unpacking. It is mainly used for the lining of Shenggang which is used in harsh conditions. In the continuous casting large tundish and the refining package, the molten pool part and the bottom of the package are lined with aluminum-magnesium carbon bricks.
Using special high-alumina bauxite as raw material, because it contains a certain proportion of SiO2 and other impurities, and the structure is not dense, and the slag resistance is poor. To improve its slag resistance, some special high-grade aluminum bismuth can be replaced by electrofusion or sintered corundum. earth. In order to improve the oxidation resistance and high temperature strength of the product, a measure of adding a small amount of metal powder is adopted, but the thermal shock resistance is lowered, thereby increasing the content of flaky graphite.