Industry Knowledge of Chrome-Corundum Refractory Castables

Chrome-corundum refractory castables are a widely used material in the refractory industry due to their excellent performance and unique characteristics. These materials are used for high-temperature applications where other materials fail to perform as expected. In this article, we will discuss the different grades, technical specifications, and production processes of chrome-corundum refractory castables.

Chrome-corundum refractory castables are classified into different grades based on their chemical composition and physical properties. The different grades are:
1. High chrome corundum castable
2. Low cement chrome corundum castable
3. Ultra-low cement chrome corundum castable

The technical specifications of chrome-corundum refractory castables are critical to their performance and durability. The following are some of the important technical specifications:
1. Refractory temperature: 1700°C - 1800°C
2. Apparent porosity: ≤5%
3. Compressive strength: ≥120MPa
4. Chemical composition: Cr2O3≥9%, Al2O3≥85%

The production process of chrome-corundum refractory castables involves several stages, including raw material preparation, mixing, drying, and heat treatment. The following is an overview of the production process:
1. Raw material preparation: Raw materials such as high purity alumina, chromic oxide, and special binders are prepared and weighed as per the recipe.
2. Mixing: The raw materials are mixed in a mixer using a suitable mixing method to form a homogenous mixture.
3. Drying: The mixture is dried in a dryer to remove the moisture content and to improve its strength.
4. Heat Treatment: The dried mixture is heat-treated at a high temperature to convert it into a solid mass with excellent refractory properties.

In conclusion, chrome-corundum refractory castables are an essential material in the refractory industry, with excellent performance and unique characteristics. Different grades, technical specifications, and production processes are available to meet various industrial requirements. Industries should invest in these materials as they are necessary for long-term industrial operations.