High-strength refractory brick

Abstract

The invention discloses a high-strength refractory brick. The high-strength refractory brick comprises a brick body, a positioning brick is arranged on the top surface of the brick body and comprises a brick base and an auxiliary brick arranged on the brick base, the brick base and the brick body have the same boundary dimension, the left side face of the brick base is away from the left side face of the brick body by a distance, the lower side face of the brick base is away from the lower side face of the brick body by the same distance, the bottom surface of the brick base is provided with positioning bumps transversely and longitudinally, and the top surface of the brick body is transversely and longitudinally provided with positioning grooves matched with the positioning bumps. A wicket hood constructed by the high-strength refractory bricks is good in strength, high in precision and simple to construct.

Description

technical field [0001] The invention relates to a high-strength refractory brickwork. Background technique [0002] In recent years, my country has absorbed foreign technology and began to design and use large kiln door covers, that is, the tertiary air is extracted from the top of large kiln door covers, and has been widely used in large precalciner kilns of many domestic manufacturers. Therefore, the kiln door cover As the size becomes larger and larger, the operating temperature of the rotary kiln generally increases. Generally, the temperature of the secondary air entering the kiln exceeds 1200°C, the flame temperature of the burner also exceeds 2000°C, and the calcination temperature of the clinker exceeds 1430°C. The kiln skin is generally formed, and the operating temperature is greatly increased compared with the traditional cement kiln. This not only brings difficulties to the mechanical design of the kiln door cover, but also brings difficulties to the construction o...

AI Technical Summary

Problems solved by technology

[0002] In recent years, my country has absorbed foreign technology and began to design and use large kiln door covers, that is, the tertiary air is extracted from the top of large kiln door covers, and has been widely used in large precalciner kilns of many domestic manufacturers. Therefore, the kiln door cover As the size becomes larger and larger, the operating temperature of the rotary kiln generally increases. Generally, the temperature of the secondary air entering the kiln exceeds 1200°C, the flame temperature of the burner also exceeds 2000°C, and the calcination temperature of the clinker exceeds 1430°C. The kiln skin is generally formed, and the operating temperature is greatly increased compared with the traditional cement kiln. This not only brings difficulties to the mechanical design of the kiln door cover, but also brings difficulties to the construction of the refractory material of the kiln door cover, especially the large area of ​​refractory at the top. The construction of the material (castable) poses difficulties

At the same time, the general service life of refractory castables is only 4 to 8 months. The castables have problems such as peeling, falling blocks, and poor alkali corrosion resistance, which leads to burn-through at the top of the kiln door cover, and the cement kiln is forced to stop. repair

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