Clay high aluminum brick is used refractory clay, according to physico-chemical indicators and the industrial uses is divided into soft mass blight soil, and half soft mass clay, and hard mass clay and high aluminum clay four species, according to using requires of different clay high aluminum brick of refractory temperature usually not below 1100 ℃, and soft mass clay often was for high alumina refractory bricks of combines agent, and half soft mass clay is for combines agent or refractory aggregate of using, hard mass of clay refractory temperature high, is now manufacturing refractory products of main raw materials, main to refractory brick of production mainly. Al2O3 content of clay, refractory high temperatures, in the production of clay bricks and the quality of high alumina refractory bricks, plays a crucial role.
But clay brick for harmful substances) content decreases, and iron oxide content of more than 5%, then clay cannot be counted as fire-resistant materials. Mainly refers to higher bauxite or iron fire-blight, is mainly used for steel-making slag or clear nodule on the furnace wall, used for cement ingredients of iron bauxite for aluminum materials.
