Technology and production system for producing aluminum acid calcium powder by using aluminum ash

Abstract

The embodiment of the invention provides a technology and production system for producing aluminum acid calcium powder by using aluminum ash. The technology comprises the steps that after being brokenand screened, the aluminum ash is evenly mixed with limestone in a predetermined proportion, and a mixed raw material is obtained; the mixed raw material is subjected to ball milling to obtain mixedraw material powder; the mixed raw material powder is subjected to preheating decomposition to obtain a decomposed mixed raw material; the decomposed mixed raw material is sintered to obtain sinteredblocks; the sintered blocks are cooled, ground and screened in sequence to obtain the aluminum acid calcium powder. The production system for producing the aluminum acid calcium powder by using the aluminum ash comprises a raw material preparation device, a raw material calcination device and a clinker processing device. Fluorides, nitrides and other harmful substances in the aluminum ash are bound with calcium ions by using the processing technology and the production system to be prepared into harmless substances, the aluminum ash can be processed into the harmless substances to protect theenvironment, moreover, the aluminum acid calcium powder produced by using the method is a main raw material for preparing an efficient water treatment agent, and the economic and environmental benefits are significant.

Description

technical field [0001] The invention relates to the technical field of chemical waste treatment, in particular to a process and a production system for producing calcium aluminate powder by utilizing aluminum ash. Background technique [0002] Aluminum ash is produced in all processes in which aluminum is melted, such as aluminum electrolysis and aluminum (including secondary aluminum) processing. Its sources can be divided into aluminum ash produced in the process of aluminum electrolytic smelting, aluminum ash in the process of aluminum melting and casting, and aluminum ash in the processing of recycled aluminum. High-risk chemicals such as ammonia, hydrogen fluoride, and cyanide are easily generated during the production and disposal of aluminum ash. In recent years, facing the increasingly severe environmental situation, the disposal of hazardous waste aluminum ash in the aluminum industry has become the focus of the industry. The reality is that due to the lack of uni...

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Problems solved by technology

The reality is that due to the lack of a unified process technology for social benefits, environmental benefits, and economic benefits, the treatment of aluminum ash in China is still at a relatively primitive stage, and a considerable part of aluminum ash is buried or discarded without treatment. The useful components in the ash cannot be effectively comprehensively utilized, and it also seriously pollutes the environment

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