Method of preparing crystal aluminum chloride from circulation fluid bed fly ash

Abstract

The present invention relates to a preparation method for crystalloid aluminum chlorate, in particular to a preparation method for crystalloid aluminum chlorate by using the circulating fluidized bed fly ash as raw material. By means of the better chemical activity of the aluminum contained in the circulating fluidized bed fly ash, the aluminum chlorate solution is obtained from the circulating fluidized bed fly ash by a direct acid dissolution process, and then the supernatant is obtained by separating the slag from the liquid in a setting tank, and the supernatant is concentrated and crystalled, finally, the solid crystalloid aluminum chlorate is obtained after spray drying. The present invention has a wide range of raw material, a low cost, a simple manufacturing process, quality product, less energy consumption, and meets the circular economy conception.

Description

Technical field:

[0001] The invention relates to a method for preparing crystalline aluminum chloride, in particular to producing crystalline aluminum chloride by using circulating fluidized bed fly ash as raw material. Background technique:

[0002] Circulating fluidized bed combustion technology is a new type of coal-fired technology, which has the advantages of wide adaptability to coal combustion, low pollution emissions, and high thermal efficiency. In the late 1980s, this technology was widely used after it was introduced into my country, especially in newly built coal gangue power plants fueled by coal gangue and low-quality coal. This technology will gradually replace traditional coal power plants in the field of coal-fired power generation Powder furnace combustion technology.

[0003] At present, the methods for producing crystalline aluminum chloride in my country mainly include the aluminum ash one-step method and the bauxite acid-dissolving method. The aluminum...

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