Lime rotary kiln

Abstract

The invention discloses a rotary kiln, in particular to a lime rotary kiln used in production of aluminum oxide or cement. The lime rotary kiln is structurally characterized in that a kiln head is connected with an inclined rotary kiln body, a transmission device driving the kiln body to rotate counterclockwise is arranged outside the rotary kiln body, a kiln tail is connected to the rear end of the rotary kiln body, a variable-diameter section is arranged at the kiln tail close to the rotary kiln body, and a raising plate is arranged on the inner wall of the variable-diameter section. The lime rotary kiln has the advantages that the lime rotary kiln is simple in structure, energy-saving, cost-saving and effective in preheating, and productivity is improved.

Description

technical field [0001] The invention relates to a rotary kiln, in particular to a lime rotary kiln used in alumina or cement production. Background technique [0002] In the production of alumina and cement, it is necessary to use a rotary kiln to produce lime, but the current limestone rotary kiln uses an external preheater for limestone preheating. This structure has the following disadvantages: On the one hand, The investment cost of the lime kiln preheater is relatively high, especially the hydraulic system and the hydraulic push rod are relatively expensive and require frequent maintenance; on the other hand, due to the complex structure of the preheater, various problems are prone to occur, such as: Failure occurs, the refractory bricks inside the preheater often fall off, etc., especially the refractory bricks inside the preheater often fall off. At the same time, maintenance due to failures will affect production, and the above reasons will greatly reduce the operat...

AI Technical Summary

Problems solved by technology

[0002] In the production of alumina and cement, it is necessary to use a rotary kiln to produce lime, but the current limestone rotary kiln uses an external preheater for limestone preheating. This structure has the following disadvantages: On the one hand, The investment cost of the lime kiln preheater is relatively high, especially the hydraulic system and the hydraulic push rod are relatively expensive and require frequent maintenance; on the other hand, due to the complex structure of the preheater, various problems are prone to occur, such as: Failure occurs, the refractory bricks inside the preheater often fall off, etc., especially the refractory bricks inside the preheater often fall off

At the same time, maintenance due to failures will affect production. The above reasons will greatly reduce the operating rate of the lime kiln and increase production costs.

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