Lining structure of electrical calcination furnace

Abstract

The invention discloses a lining structure of an electrical calcination furnace. The lining structure comprises a furnace shell (6) and a furnace cover (7); a refractory brick layer which is close to the center of the furnace is divided into two parts, that is, an end refractory brick part (1) positioned in low-temperature areas of the upper end and the lower end and a middle refractory brick part (2) positioned in a high-temperature area; a refractory insulating particle layer (3) is positioned outside the end refractory brick part (1) and the middle refractory brick part (2), an insulating layer (4) is positioned outside the refractory insulating particle layer (3), a ceramic fiber layer (5) is positioned outside the insulating layer (4), and the furnace shell (6) is positioned outside the ceramic fiber layer (5); and an upper electrode (9) is positioned in the center of the upper part of the furnace body, and a lower electrode (10) is positioned in the center of the lower part of the furnace body. The lining structure has the advantages of simple construction, wide temperature operating range, stable service performance, long service life, guaranteed quality and capacity of the product, high utilization rate of the electrical heat energy as well as low operation and maintenance cost.

Description

technical field [0001] The invention relates to a carbon calcination production equipment, in particular to an inner lining structure of an electric calcination furnace. Background technique [0002] At present, the production of electric calciner requires calcining the calcined coke to a high temperature above 1300°C, and the structure and material selection of the furnace lining are the most critical issues. In the prior art, a three-layer structure such as high alumina bricks, refractory brick particles and asbestos boards is used as the inner lining. The defects of this lining structure are: 1) the temperature of the furnace wall is too high and the heat dissipation is large, which not only causes a large loss of electric energy, but also increases the temperature burden of the steel furnace shell, and also deteriorates the operating environment; 2) due to the There is no difference in the lining material along the axial direction. The lining temperature in the high-tem...

AI Technical Summary

Problems solved by technology

The defects of this lining structure are: 1) the temperature of the furnace wall is too high and the heat dissipation is large, which not only causes a large loss of electric energy, but also increases the temperature burden of the steel furnace shell, and also deteriorates the operating environment; 2) due to the There is no difference in the lining material along the axial direction. The lining temperature in the high-temperature zone in the middle of the furnace reaches the limit, while the low-temperature zone at the upper and lower ends of the furnace is far from the maximum service temperature of the lining, resulting in insufficient and reasonable utilization of the lining material.

[0003] Recently, some manufacturers simply thicken the lining of the furnace in an attempt to reduce the heat dissipation of the furnace wall, but then the lining material of the furnace is burned out due to the high temperature, resulting in a shutdown accident

Obviously, the existing lining structure of electric calciner is not ideal enough

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