Introduction to castable refractory materials

Castable refractory is an inorganic non-metallic material with excellent high temperature resistance. It is usually composed of composite materials and can work stably for a long time at high temperatures. Its material is diverse and can meet the needs of different industrial fields. It is an indispensable material in thermal equipment. This article will introduce castable refractory in detail from multiple aspects.

1. Castable material

The material of castable refractory materials can be customized according to different needs of users. For example, high aluminum castables, alkali-resistant castables, castables for steel castings, wear-resistant castables, corundum castables, etc. Choosing the right material can not only enhance the performance of the material, but also increase its service life.

According to the refractory material standards, castables of different materials have the following characteristics:

• High alumina castable: high aluminum oxygen content, high temperature resistance, wear resistance, suitable for high temperature kilns.
• Alkali-resistant castable: has strong resistance to alkaline corrosion and is suitable for the chemical industry.
• Corundum castable: high purity, good corrosion resistance, suitable for high temperature areas in the metallurgical industry.

2. Castable type

Castables can be divided into different types according to their functions and application areas:

• Ordinary castable: suitable for various general high-temperature equipment.
• Low cement castable: low cement content, high strength and excellent thermal shock resistance.
• Self-flowing castable: No vibration required, automatic flow characteristics, easy to construct.

3. Casting material production

When purchasing castables, users first need to provide detailed technical parameters and usage requirements to the refractory supplier. For example, the required material, temperature range, installation location, etc. The supplier will determine the formula and production process based on this information to ensure that the castables produced can meet the specific needs of users.

Here is a simple production step: powder and binder are mixed in proportion -> add water and additives -> stir evenly -> pour into mold -> solidify -> dry and sinter.

4. Application of castables

Castable refractory materials are widely used in industrial fields, such as cement kilns, blast furnaces, electric arc furnaces, glass kilns, etc. Its advantages mainly include:

• High compressive strength: able to withstand large amounts of mechanical stress.
• Good thermal shock stability: no cracks will occur under rapid temperature changes.
• Excellent wear resistance: It can maintain good mechanical properties for a long time at high temperatures.

By rationally designing the castable, the overall performance of the industrial furnace lining can be greatly improved, providing users with longer service life and higher production efficiency.

The above is a detailed introduction to castable refractory materials. Generally speaking, castables are designed and customized according to the specific needs of thermal equipment, requiring users to provide detailed technical parameters and usage requirements to ensure that refractory materials that meet the usage conditions are produced.