The main components of refractory materials such as breathable bricks, nozzle block bricks, and castables

Refractory materials are widely used in metallurgy, chemical technology, petroleum and petrochemical, machinery manufacturing, power processing and other industrial fields, of which the largest amount is used in the metallurgical industry. In the steel ladles and refining furnaces in the steelmaking industry, the refractory materials commonly used by steelmaking manufacturers include breathable bricks, nozzle block bricks, electric furnace covers, castables, drainage sand, magnesia carbon bricks, etc. These refractory materials are different, and the main components and added components are quite different. From a chemical analysis, refractory materials are composed of minerals, such as corundum, mullite, magnesia, etc. The main components of which are alumina and magnesia.

(Picture) Corundum

As for the main component of refractory material, it is the matrix component that constitutes the property of refractory, is the basis of the characteristics of refractory materials, and directly determines the properties of refractory products. For example, breathable bricks need to be made of high-quality ore, and then made through strict and reasonable procedures, so as to ensure that the life span of the breathable bricks used by steel manufacturers can meet the requirements. The main components of refractory materials can be oxides (aluminum oxide, magnesium oxide, etc.), or elements or non-oxide compounds (carbon, silicon carbide, etc.).

According to the nature of the main components, refractory materials can be divided into three categories: acidic, neutral, and alkaline. Acidic refractory materials are mainly materials containing acidic oxides such as silicon oxide. The main component is silicic acid or aluminum silicate, which will generate salts under the action of high temperature and alkali. The main chemical components of alkaline refractories are magnesium oxide, calcium oxide, etc. Common refractory products include drainage sand and ladle slides. Neutral refractories are strictly carbonaceous and chromium refractories. In addition, high-aluminum refractories (alumina content greater than 45%) are neutral refractories that tend to be acidic, while chromium refractories tend to be more alkaline. For neutral refractory materials, common high-alumina refractory materials include breathable bricks, nozzle block bricks, and electric furnace covers.

(Picture) Furnace cover

Our company has 18 years of research and development, production and sales of refractory materials such as breathable bricks, nozzle block bricks, castables, and patented formulas, unique designs, and strict and standardized implementation of each process, so that steel manufacturers can use them with peace of mind and comfort.