Extremely-simple Bayer process

Abstract

The invention relates to an extremely-simple Bayer process. The extremely-simple Bayer process comprises the following steps that bauxite and lime enter a raw material mill, obtained qualified ore pulp enters a dissolution process, dissolved slurry enters a dilution rear tank and then enters a washing settling tank, and obtained Bayer-process red mud is sent to a sintering process for treatment. The process has the advantages and effects that the power consumption of unit products of a Bayer-process part is greatly reduced by reducing operation equipment such as a mill, a lime kiln, a dilution rear tank and a red mud washing tank; lime firing cost is reduced by reducing the lime proportion of the Bayer-process part; and system flow is reduced by reducing the molecular ratio of dissolved ingredients, so the steam consumption and the unit fixed cost caused thereby are also reduced.

Description

technical field [0001] The invention relates to a minimalist Bayer method, in particular to a method for simplifying part of the production process of the Bayer method as much as possible and reducing the consumption of part of the production of the Bayer method in a factory that adopts a series method of production, and belongs to the technical field of alumina production . Background technique [0002] The alumina production methods that have been successfully used in large-scale industrial production include Bayer method, sintering method, parallel method, mixed method and series method, among which Bayer method has good economy for ore with better grade and low investment. , the operation is simpler, but it also has its inherent defects. For example, the alumina recovery rate and alkali consumption in the ore are not as good as those of the sintering process, and its advantages of low investment and low energy consumption make it Under certain conditions, it has become ...

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Problems solved by technology

[0002] The alumina production methods that have been successfully used in large-scale industrial production include Bayer method, sintering method, parallel method, mixed method and series method, among which Bayer method has good economy for ore with better grade and low investment. , the operation is simpler, but it also has its inherent defects. For example, the alumina recovery rate and alkali consumption in the ore are not as good as those of the sintering process, and its advantages of low investment and low energy consumption make it Under certain conditions, it has become the most widely used mainstream production process at home and abroad; as the domestic ore grade has been falling all the way in recent years, the price has been rising all the way, and the price of caustic soda has been rising all the way due to environmental protection. The French production process has returned to the field of vision of the managers of alumina production enterprises

[0003] Therefore, the overall investment and consumption of the series method are much higher than that of the Bayer method, which also limits its use. How to realize the minimum operating cost through the adjustment of the production process is the problem to be solved by the present invention

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