Industry Knowledge of Chrome-Corundum Refractory Castables

Chrome-corundum refractory castables are a type of refractory material with high-temperature resistance and excellent corrosion resistance. They are widely used in various industries such as metallurgy, chemical, and petrochemical industries. This article will introduce the classification, technical parameters, and production process of chrome-corundum refractory castables.

Chrome-corundum refractory castables can be classified into three grades: low, medium, and high chrome. Low-chrome castables have a Cr2O3 content of less than 5%, medium-chrome castables have a Cr2O3 content of 5-10%, and high-chrome castables have a Cr2O3 content of more than 10%.

The technical parameters of chrome-corundum refractory castables include bulk density, apparent porosity, cold crushing strength, and thermal shock resistance. Generally, the bulk density of chrome-corundum refractory castables is between 2.4-2.8 g/cm³, the apparent porosity is between 15-20%, and the cold crushing strength is between 80-120 MPa. The thermal shock resistance depends on the application conditions and varies from product to product.

The production process of chrome-corundum refractory castables includes raw material preparation, mixing, forming, and firing. The raw materials used in the production of chrome-corundum refractory castables are high-purity corundum, chrome oxide, and appropriate binders. The mixing process involves mixing the raw materials in a predetermined ratio with water. The formed mixture is then poured into molds and compressed to the desired shape. Finally, the molded castables are dried and fired at high temperatures to achieve the desired properties.

Chrome-corundum refractory castables are a vital part of the refractory industry due to their excellent high-temperature resistance and corrosion resistance. Proper classification, technical specifications, and production processes can ensure their performance in various industrial applications. With the continuous advancement of technology, the development of chrome-corundum refractory castables will further improve their performance and expand their application range.