Industry Knowledge of Zirconia Refractory Castables

Zirconia refractory castables are versatile material used in numerous high-temperature applications, including furnaces, kilns, and incinerators. Its excellent thermal, mechanical, and chemical properties make it a preferred choice for many industries. This article will discuss the industry knowledge of zirconia refractory castables, including their classification, technical parameters, and production process.

Zirconia refractory castables are classified based on their zirconia content, which ranges from 5% to 80%. The higher the zirconia content, the greater the material's resistance to thermal shock and chemical erosion. Typically, zirconia refractory castables are categorized as low-zirconia, medium-zirconia, and high-zirconia. Low-zirconia castables contain 5%-15% zirconia, medium-zirconia contains 25%-35% zirconia, and high-zirconia contains 60%-80% zirconia.

Zirconia refractory castables have several technical parameters that determine their properties and suitability for specific applications. These parameters include bulk density, apparent porosity, cold crushing strength, thermal conductivity, and linear shrinkage. Generally, higher bulk density and cold crushing strength indicate better physical properties, while lower porosity and thermal conductivity indicate better insulation properties.

The production process of zirconia refractory castables involves mixing zirconia grains, binders, and additives to form a homogenous slurry. The slurry is then poured into molds and subjected to a controlled drying process, which typically involves air-drying followed by a slow heating process. The final step involves firing the material at a high temperature to produce a dense and strong castable.

Zirconia refractory castables are an excellent choice for various high-temperature applications due to their excellent thermal, mechanical, and chemical properties. They are classified based on their zirconia content and have several technical parameters that determine their suitability for specific applications. The production process involves mixing, drying, and firing to produce a high-quality material.