Why Do Chromium Corundum Bricks Have Two Different Colors?

The raw material used in the chromium corundum bricks is a solid solution synthesized by melting alumina and chromium oxide in a certain proportion at high temperatures. Using special refractory material production technology to make refractory bricks can improve and enhance the intrinsic quality of the product and improve the high-temperature performance of the product.

The reason for the two colors of chrome corundum bricks

Chrome corundum bricks are mainly made of corundum and added with chrome green. The initial appearance color of the molding is green. However, after high-temperature sintering and reaction with CO, the appearance color will turn to red or even purple. The color change is based on the chromium content. Determined by the level. The load-resistant softening temperature of chromium corundum brick is very high.

Characteristics of chromium corundum bricks

Load softening temperature of chrome corundum bricks

Adding Cr2O3 to high-purity corundum materials, no matter how much is added, will not reduce the fire-resistant performance of the material, but will actually improve the fire-resistant performance of the material. The refractoriness (>1790℃) and load softening temperature (>1700℃) of chrome corundum bricks are better than those of high-purity corundum products.

The strength of chromium corundum bricks

The normal temperature compressive strength of high-purity corundum bricks is generally 70~100MPa. The normal temperature compressive strength of high-performance chromium corundum bricks is generally >150MPa and its strength is significantly higher than that of corundum bricks. This is because, during the firing process of the product, an AL2O3-Cr2O3 solid solution is formed between the particles and between the particles and subdivisions. This solid solution links the particles and fine powder together like a bridge, making the material stronger. improve.

Application scope of chrome corundum refractory brick

Chrome bricks, chrome corundum bricks, and high chromium bricks are mainly used in coal chemical industry gasification furnaces, chemical industry kilns, rock wool fiber kilns, waste incinerators, frit furnaces, carbon black reaction furnaces, glass glazes, and other kilns key parts. Chrome corundum bricks are mainly used in carbon black reactors, copper smelting furnace linings, slideways, slide rails, tapping troughs, tapping platforms, and other parts of steel rolling heating furnaces.