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Red mud slurry heating method and apparatus for alumina production

A heating method, red mud slurry technology, applied in the field of red mud slurry heating, can solve the problems of low heating efficiency, influence on sedimentation separation and washing, uneven temperature of red mud slurry, etc., and achieve easy cleaning, easy scarring and clogging, cleaning difficult effect

Active Publication Date: 2007-08-01
GUIZHOU BRANCH CHINA ALUMINUM IND
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method and equipment for heating red mud slurry in the alumina production process, so that the temperature of the red mud slurry can meet the production process requirements, so as to solve the problems of low heating efficiency and low temperature of the red mud slurry in the prior art. Inhomogeneity, steam agitation affects many technical problems such as sedimentation separation and washing

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  • Red mud slurry heating method and apparatus for alumina production

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Embodiment Construction

[0018] Embodiment of the present invention: due to heat dissipation and cooling in the process of material transportation and residence, the temperature of the red mud slurry from the previous process cannot meet the technical requirements of the sedimentation separation and washing process. Therefore, a branch pipe (2) is opened on the red mud slurry conveying pipeline (1) to divert the red mud slurry entering the feed tank (7), and 1 / 3 to 1 / 2 of the slurry is sent into the feed tank (7) through the valve (9). Heater (4) is thoroughly mixed with steam entering through pipe (3). After uniform heating, the feed box (7) that enters the settling tank (6) through the pipeline (5) is mixed with the red mud slurry that directly enters the feed box (7) through the pipeline (1), and then enters the settling tank through the pipeline (11) (6) To ensure that the red mud slurry reaches the slurry temperature required by the process technology during the washing process. The red mud slur...

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Abstract

The present invention discloses red mud slurry heating method and apparatus for alumina production. The red mud slurry is partially heated before entering the washing and depositing tank to reach the technological process required temperature, and this can improve the deposition performance and washing effect of red mud slurry and ensure the stable and high output running of the washing and depositing tank. At the same time, material is conveyed with bottom pump and steam enters the heater by means of self pressure, so that two kinds of material contact fully to exchange heat, resulting in fast heating, easy operation and saving in energy.

Description

Technical field: [0001] The invention relates to a method and equipment for heating red mud slurry in the alumina production process. technical background: [0002] At present, in the sedimentation separation and washing process of red mud slurry in domestic alumina production, the temperature control of red mud slurry is one of the key operating technical conditions. The temperature cannot meet the technical requirements of the sedimentation separation and washing process, which will have a negative impact on production control, and it must be heated in a reasonable way. At present, steam is generally used to pass directly into the settling tank for heating. This method has poor controllability, slow heating speed, low efficiency, and serious waste of steam; heating pipes should not be too many, and should not extend too deep into the tank. Therefore, the heating point The temperature difference between the non-heating point and the non-heating point is large, which makes ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F7/02
CPCY02P20/10
Inventor 李丛生薛银昌陈立周江筑王强
Owner GUIZHOU BRANCH CHINA ALUMINUM IND
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