Method for preparing flue gas purifying agent from aluminum ash

Abstract

The invention discloses a method for preparing a flue gas purifying agent from aluminum ash. The method comprises the following steps: adding a calcium source and a sodium source into the aluminum ash, conducing uniform mixing, and performing calcining in a nitriding device to obtain the flue gas purifying agent. The method is low in production cost and high in efficiency, and high-quality cyclicutilization of resources is achieved.

Description

technical field [0001] The invention relates to the field of resource utilization of colored solid waste, in particular to the application of aluminum ash to prepare a flue gas purifier, and the flue gas purifier prepared by the aluminum ash can be used to remove nitrogen oxides in cement kiln flue gas. Background technique [0002] Aluminum ash is a product of the aluminum melting and casting process. According to the raw materials used in aluminum melting and casting and the production purpose, the composition and content of aluminum ash will be quite different. The aluminum ash produced by electrolytic aluminum liquid to produce remelted aluminum ingots accounts for about 1.1% of the ingot output. The composition is relatively simple and stable, mainly composed of metal aluminum, alumina, aluminum nitride, chloride salt (sodium chloride , potassium chloride) and electrolytes (sodium fluoride, calcium fluoride, cryolite, etc.), of which aluminum accounts for about 40%-50%...

AI Technical Summary

Problems solved by technology

[0005] The aluminum ash used in this patent is the secondary aluminum ash after extracting metal aluminum from the primary aluminum ash. In view of the problem that the secondary aluminum ash cannot be used at a high value, this patent provides a method for preparing a flue gas purifier from the aluminum ash to promote the recovery of the aluminum ash. High value utilization

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