Rotary kiln lining structure

Abstract

The invention provides a rotary kiln lining structure. The rotary kiln lining structure comprises a rotary kiln barrel body and a lining. A heat preservation layer is laid on the inner wall of the rotary kiln barrel body and is arranged between the rotary kiln barrel body and the lining. The lining is formed by surrounding and piling refractory bricks. The refractory bricks comprise heat insulation layers, refractory fiber layers and refractory layers, wherein the heat insulation layers, the refractory fiber layers and the refractory layers are sequentially distributed and are internally provided with penetrating anchoring nails. A plurality of protruding connecting arms are connected to the outer sides, close to the heat preservation layer, of the refractory layers and are in rigid contact with the heat preservation layer. Cavities are formed between adjacent connecting arms and the heat preservation layer. Heat preservation cotton is filled in the cavities. Broken-line-shaped construction gaps are formed between refractory layers of the adjacent refractory bricks. By means of the rotary kiln lining structure, the heat preservation effect is good, and energy is not easy to lose. The rotary kiln lining structure is not easy to damage, and the service life is prolonged.

Description

technical field [0001] The invention relates to the technical field of smelting equipment, in particular to a rotary kiln lining structure. Background technique [0002] Rotary kiln, also known as rotary kiln, is a cylindrical equipment with a certain inclination. The rotation of the kiln body is used to promote the mixing of materials, so that the materials can be fully mixed and contacted for reaction. Has a wide range of applications. During the working process, the temperature inside the rotary kiln can be as high as 1300°C. The kiln body of the rotary kiln is generally composed of refractory bricks, insulation bricks and the rotary kiln shell wrapped outside. Although the refractory bricks can withstand high temperatures, their thermal conductivity is too high. Large, so that the surface temperature of the metal rotary kiln shell is higher, which can reach more than 300 ° C, which not only increases the production risk, but also makes the outer wall of the rotary kiln ...

AI Technical Summary

Problems solved by technology

During the working process, the temperature inside the rotary kiln can be as high as 1300°C. The kiln body of the rotary kiln is generally composed of refractory bricks, insulation bricks and the rotary kiln shell wrapped outside. Although the refractory bricks can withstand high temperatures, their thermal conductivity is too high. Large, the surface temperature of the metal rotary kiln shell is high, which can reach more than 300 °C, which not only increases the production risk, but also makes the outer wall of the rotary kiln shell lose a lot of heat through radiation heat dissipation, air convection, etc.

In addition, the inner lining of the existing rotary kiln is easily damaged during high-temperature work, and the construction joints on the inner lining are often linear, which causes the powder coke and other substances in the rotary kiln to directly wash the insulation layer, making the insulation layer easy to fall off. Affect the function of the rotary kiln

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