Method for upgrading bauxite mother liquor after ore grinding

By using circulating mother liquor as the sole medium in bauxite pretreatment, the full dissociation and efficient separation of aluminum minerals and impurities are achieved, solving the coupling problem between bauxite pretreatment and the Bayer process main process, reducing production costs and improving resource utilization.

CN122276799APending Publication Date: 2026-06-26ZHENGZHOU NON FERROUS METALS RES INST CO LTD OF CHALCO
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Patent Information

Application Number
CN202610412005.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-03-31
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

Existing bauxite pretreatment methods suffer from problems such as media incompatibility, process fragmentation, interference from external media, and process complexity when coupled with the Bayer process main process, resulting in high production costs, low efficiency, and difficulty in achieving efficient impurity removal.

Method used

Using circulating mother liquor as the sole medium, the Bayer process achieves full dissociation and efficient separation of aluminum minerals and impurities through grinding and beneficiation, forming a straight-through process that avoids interference from external media and allows for closed-loop utilization of the medium.

Benefits of technology

This achieves deep coupling and seamless integration between bauxite pretreatment and the Bayer process main flow, reducing production costs, improving aluminum ore recovery and resource utilization, simplifying the process flow, and reducing red mud production and alkali consumption.

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Abstract

The invention provides a method for upgrading bauxite mother liquor after ore grinding, and belongs to the field of mineral processing. The method comprises the following steps: carrying out ore grinding treatment on mixed ore pulp of bauxite to be upgraded and circulating mother liquor to obtain alkaline ore pulp in which aluminum minerals and gangue minerals are fully dissociated; the circulating mother liquor serves as a separation medium and an auxiliary medium in the whole process, the alkaline ore pulp is subjected to mineral separation and quality improvement treatment, iron and silicon impurities are separated from the circulating mother liquor medium, and concentrate ore pulp and tailing ore pulp are obtained; feeding the concentrate pulp into an aluminum oxide dissolution process; and the tailing pulp is subjected to separation treatment, and circulating mother liquor and tailing by-products are obtained. Through systematic process reconstruction and medium closed-loop design, the bauxite pretreatment method which can be deeply coupled and seamlessly connected with the main process of the Bayer process, avoids interference of external media and realizes efficient impurity removal under the state that minerals are fully dissociated is successfully developed.
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