Method for inspissation of carbon content mother liquor by rotary kiln cooler

Abstract

The invention provides a method for inspissation of carbon content mother liquor by a rotary kiln cooler, aiming at recycling residue heat in a clinker rotary kiln cooler in the manufacturing process of aluminium oxide by a sintering method and reducing the consumption of steam in an evaporation process. The method is characterized in that the process comprises the following steps: the carbon content mother liquor is taken as a cooling medium of the rotary kiln cooler, on the one hand, the carbon content mother liquor can cool off the rotary kiln cooler, and on the other hand, the carbon content mother liquor which is introduced into the rotary kiln cooler can be preheated to evaporate under the high temperature of the rotary kiln, then the carbon content mother liquor which is preheated to evaporate is sent to an evaporated stock liquid tank and an evaporator for evaporation and concentration. In the method, before entering the evaporator, the carbon content mother liquor first passesthrough the clinker kiln cooler, thus changing the original process flow and method; the carbon content mother liquor replaces the circulating water as the cooler spraying and temperature reduction medium, and the residue heat of the clinker is firstly used to evaporate part of the water, thus effectively decreasing the consumption of steam and water in the manufacturing process.

Description

technical field [0001] A method of using a rotary kiln cooler to evaporate concentrated carbon mother liquor, which relates to the recovery and utilization of the waste heat of the clinker rotary kiln cooler in the production of sintered alumina, and at the same time reducing the steam consumption in the evaporation process by using the rotary kiln cooler to evaporate carbon The method of dividing the mother liquor. Background technique [0002] In the process of producing alumina by sintering, the temperature of the clinker coming out of the cooling zone of the clinker kiln is about 1000°C. If such clinker is directly sent to the secondary crushing system, the conveying equipment will be overheated and deformed. The dissolution of the material requires that the temperature of the clinker entering the mill should be less than 150°C. In order to meet the requirements of the conveying and dissolution process, a special clinker cooling equipment-cooler is required. During the ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to address the shortcomings of the above-mentioned prior art, and to provide a rotary kiln cooler that can effectively solve the problem of large steam and water consumption in the production process caused by the cooling of the rotary kiln cooler by circulating water and the evaporation of carbon mother liquor. The method of distilling and concentrating carbon fraction mother liquor