Medium-density alkali-resistant brick for rotary kiln and preparation method thereof

Abstract

The invention discloses a medium-density alkali-resistant brick and a preparation method thereof. The product density is reduced by introducing lightweight aggregate into high-density alkali-resistant brick; and the adopted raw materials comprise 30-62 parts of flint clay with the granularity of 0-8mm or silica with the granularity of 0-8mm or pyrophyllite with the granularity of 0-8mm or high-silicon waste porcelain with the granularity of 0-8mm, 19-43 parts of flint clay powder not larger than 180 meshes or pyrophyllite powder not larger than 180 meshes, 4-8 parts of clay, 10-20 parts of lightweight aggregate and 5-8 parts of additional binding agent all by weight. The preparation process comprises the steps of mixing, forming, drying, firing and the like. Compared with high-density alkali-resistant brick, the medium-density alkali-resistant brick prepared through the invention has the advantages of low heat conductivity coefficient, light weight and the like, can reduce heat loss and the consumption of energy and equipment power in the using process, and realizes an effect of improving the working environment and saving energy and reducing emission.

Description

technical field [0001] The invention relates to a medium-density alkali-resistant brick and a preparation method thereof, belonging to the technical field of refractory materials. Background technique [0002] With the continuous emergence of new technologies for cement production, the main equipment of cement production is developing in the direction of large-scale, increasing production, improving quality, saving energy, reducing consumption, and reducing costs have become the key to increasing efficiency in production management. Most of the existing refractory bricks and heat insulation bricks have a single structure, and bricks with various properties need to be used together. If they are used on relatively fixed equipment, such as tunnel kilns and downdraft kilns, they can meet the requirements when used together. ; But on some relatively moving equipment, such as a rotary kiln, it is difficult to meet the requirements when used together. Some manufacturers and resear...

AI Technical Summary

Problems solved by technology

The temperature of the outer wall of the cylinder is high. On the one hand, it increases the heat dissipation of the kiln cylinder, thereby increasing the heat consumption of the clinker and causing an increase in the unit cost of the clinker; High, especially in the later period of use or in summer, it will bring great hidden dangers to the normal operation of the equipment

The overheating of the cylinder increases the damage probability of mechanical equipment and accelerates the deformation of the cylinder, and the deformation of the cylinder accelerates the mechanical damage of the inner lining. The result is brick falling and kiln shutdown, which affects the operation rate of the cement rotary kiln