The high alumina bricks used for the top of electric furnaces are generally divided into three grades: DL-80, DL-75, and DL-65, which are applied to different top of electric furnaces. The high alumina brick on the top of the electric furnace is made from high-purity and well sintered bauxite as the main raw material, formed by a high-tonnage brick press, and fired at high temperature.
The main crystal phases of the product are mullite and corundum phases, which are resistant to high temperature, high strength, and good slag corrosion resistance. During use, the top structure of the electric furnace is firm and does not cause detachment accidents. The products are divided into two types: firing molding and phosphate combined baking
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