Characteristics of neutral refractories
The main crystalline phases in high alumina products are mullite and corundum. The content of corundum increases with the increase of alumina content. Corundum products containing more than 95% alumina is a widely used high-quality refractory material. Chrome brick mainly chrome ore as raw material, the main crystalline phase is chromite. It has good corrosion resistance to steel slag, but its thermal shock resistance is poor and the deformation temperature of high temperature load is low. With chrome and magnesia in different proportion made of magnesite chrome brick with good thermal shock resistance, mainly used as a basic open hearth top brick.