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Technique and equipment for mixing ore pulp in production of alumina

A technology of mixing equipment and mixing process, which is applied in the preparation of alumina/aluminum hydroxide, alkali metal aluminate/alumina/aluminum hydroxide, and a mixer with a rotary stirring device, etc., can solve the problem of damaging the operating environment, dilution It can protect the operating environment, prevent the slurry from leaking out, and improve the safety effect.

Active Publication Date: 2007-10-10
SHENYANG ALUMINIUM MAGNESIUM INSTITUTE
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AI Technical Summary

Problems solved by technology

Because the gas volume in this part fluctuates frequently with the change of dissolution conditions, resulting in a large amount of exhaust steam leakage, this part of exhaust steam is prone to carry material, seriously affecting the safety of the on-site operating environment
[0005] (2) Fluctuations in production often lead to the phenomenon of the dilution tank leaking, and the diluted pulp is easy to leak, that is, it is easy to shorten the life of the dilution tank and damage the operating environment

Method used

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  • Technique and equipment for mixing ore pulp in production of alumina

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Embodiment Construction

[0023] The embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited by the embodiments.

[0024] In the pulp mixing process in alumina production, the stripping pulp 2 is self-pressurized into the dilution tank 1, and the red mud washing liquid 5 sent by the delivery pump 6 and the aluminum hydroxide washing solution 8 sent by the delivery pump 9 are in the dilution tank 1. Effective mixing is carried out inside, and the mixed and diluted diluted slurry is transported to the red mud separation and washing process through the delivery pump 7.

[0025] As shown in Figure 1, the slurry mixing equipment in the alumina production of the present invention has the following structure:

[0026] Replace the dilution tank with a dilution tank. A spiral ascending plate is installed in the dilution tank to slow down the flow rate of the secondary steam and effecti...

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Abstract

This invention discloses process and apparatus for producing Al2O3, especially relates to process and apparatus for mixing slurry in autoclaving and stripping process of Al2O3 production. The process comprises: sending stripping slurry to a diluting kettle, and mixing with red mud wash liquor and aluminum hydroxide wash liquor in the diluting kettle. This invention utilizes the diluting kettle as a substitute for diluting tank, thus can avoid material stripping phenomenon caused by secondary steam flash evaporation, and ensure the tightness of the system. An electric butterfly valve is set at the gas exhaust pipe of the diluting kettle, which can effectively adjust the liquid level fluctuation in the diluting kettle, and can protect the apparatus under overpressure of the system. Therefore, the safety of the system is improved.

Description

technical field [0001] The invention relates to an alumina production process and equipment, in particular to an ore pulp mixing process and equipment for pressure cooking and leaching process in alumina production. Background technique [0002] In the existing pressure cooking and dissolution process of alumina production process, the raw ore slurry is heated to the dissolution temperature through indirect or direct heating. After staying in the heat preservation dissolution device, the dissolution slurry needs to be flash-cooled to recover the remaining heat. The slurry is discharged from the evaporator from the final stage to the dilution tank, mixed with the red mud washing liquid and aluminum hydroxide washing liquid, and then sent to the red mud separation and washing process through the dilution pump. A large amount of exhaust steam will be generated during the mixing process. [0003] Existing hybrid methods have the following problems: [0004] (1) The mixed slurr...

Claims

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Application Information

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IPC IPC(8): C01F7/02C01F7/06B01F7/22B01F27/91
Inventor 刘志坚周凤禄王剑
Owner SHENYANG ALUMINIUM MAGNESIUM INSTITUTE
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