Method for sorting monohydrallite

A bauxite and pulp technology, applied in chemical instruments and methods, wet separation, solid separation, etc., can solve the problems such as failure to further increase the mineral processing output, affecting the realization of production capacity, low production capacity of the mill, etc. The effect of increasing production capacity and reducing the amount of addition

Inactive Publication Date: 2014-04-23
GUIZHOU BRANCH CHINA ALUMINUM IND
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Problems solved by technology

However, due to the high hardness of the ore itself, its grindability is poor. In order to ensure the concentration and fineness required by flotation, the amount of material discharged by th

Method used

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  • Method for sorting monohydrallite

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Embodiment

[0015] Grinding and grading diversion system, based on the structure of the original 1# mill and classifier, at the top of the classifier where the sand returns into the chute (at the centerline of internal and external rotation symmetry), a circular hole with a diameter of about 250mm is opened. Below the above-mentioned concentrate discharge port, a chute with a length of about 3m is connected. The upper end of the chute is connected with a flange and is designed with a movable insert plate. If necessary, it can be closed to facilitate maintenance or stop the concentrate discharge process. A belt is connected below the chute, and the concentrate enters the concentrate storage yard.

[0016] After experimentation and exploration, when the 1# mill discharges 80t / h and its discharge of concentrate is about 20t / h, the entire grinding and classification system can maintain stable operation.

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Abstract

The invention relates to a mineral separation-Bayer process in the aluminum oxide production process, in particular to the improvement of a technique in the ore grinding and mineral separation process, and discloses a method for sorting monohydrallite. The method comprises the steps that raw ore is crushed, levigated and graded through a grader, sand return and regrinding are carried out on rough particle ore pulp flow separated from the top end of the grader, and grader underflow ore pulp floatation is carried out. The method is characterized in that sand return sampling analysis is carried out at an inlet chute at the top end of the grader, and when A/S is larger than 5.0, the rough particle ore pulp flow separated from the top end of the grader is directly discharged out and used as ore concentrate for producing aluminum oxide through the Bayer process. According to the method, the production mode of the whole closed cycle of a conventional grader is broken through, the treatment capacity of a mill can be effectively improved, the of pressure subsequent flotation, sedimentation and other production links is reduced, the mineral separation yield is improved, mineral separation production cost is lowered, and therefore the operation cost of aluminum oxide production is lowered.

Description

Technical field [0001] A method for sorting bauxite. It relates to an improvement in the process of producing alumina by the "dressing-Bayer process", specifically the improvement of the process method of the grinding and beneficiation process. technical background [0002] Bauxite beneficiation technology is the use of flotation methods to maximize the concentration of aluminum in bauxite under existing conditions, making it a qualified raw material for the production of alumina by the Bayer process. Therefore, the "dressing-Bayer process" has gradually become an important method for alumina production. [0003] At present, the separation of bauxite in the beneficiation area mainly consists of crushing, grinding and grading the raw ore into a slurry that meets the flotation concentration and fineness requirements, and then enriching the aluminum content in the slurry by flotation. The collected slurry is passed through production steps such as filter press and blending, and the ...

Claims

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Application Information

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IPC IPC(8): B03B7/00
Inventor 严育红杨群太杜金岭喻东池清泉孙春亮
Owner GUIZHOU BRANCH CHINA ALUMINUM IND
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