Refractory clay fire bricks of this kind are vital in industry.

I. Properties

1. High Refractoriness: These bricks can bear temperatures above 1500°C without getting deformed. Their composition and firing process lead to a stable microstructure. For example, in a steelmaking furnace, the molten steel constantly subjects the bricks to intense heat. Still, the bricks keep their shape and integrity, which ensures the steelmaking process goes smoothly.
2. Good Thermal Insulation: With low thermal conductivity, they cut heat transfer, enhancing energy efficiency and safeguarding equipment shells. In a glass melting furnace, these bricks help to keep the heat inside the furnace, reducing the amount of energy required to maintain the high temperatures needed for glass production.
3. Chemical Resistance: Resistant to chemical corrosion in harsh industrial atmospheres. In a chemical processing kiln where various reactive substances are present, the bricks withstand the chemical attacks and prevent contamination of the products being processed.

II. Applications

1. Furnaces: Used in melting and heat-treatment furnaces for metals.In an aluminum smelting furnace, refractory clay fire bricks line the inside. They create a stable, high-temp space for melting aluminum ores. In steel heat-treatment furnaces too, these bricks are useful. Here, exact temperature control and stable structure are key for getting the right steel properties.
2. Kilns: Essential in ceramic and cement kilns. In a porcelain kiln, the bricks ensure even heat spread and fire the porcelain evenly, making it gain hardness and gloss. In a cement rotary kiln, they bear high temps and the corrosive setting from raw materials and reactions during cement making.
3. Boilers: Protect boiler walls from intense heat and boost thermal efficiency. In a large industrial power plant boiler, the refractory bricks act as a thermal barrier, reducing heat loss to the surroundings and increasing the overall efficiency of the power generation process.