Method for stockpiling red mud generated in process of producing aluminum oxide by combination method

A technology of alumina and combined method, applied in chemical instruments and methods, sludge treatment, water/sludge/sewage treatment, etc., can solve the problems of water occupying storage capacity, red mud recovery and high transportation costs, and achieve physical and mechanical properties Good results

Active Publication Date: 2010-06-16
GUIZHOU BRANCH CHINA ALUMINUM IND
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  • Application Information

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Problems solved by technology

[0004] To provide a storage method of red mud in combined alumina production, to solve the technical problems in the prior

Method used

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  • Method for stockpiling red mud generated in process of producing aluminum oxide by combination method
  • Method for stockpiling red mud generated in process of producing aluminum oxide by combination method

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Experimental program
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Embodiment Construction

[0019] Embodiments of the invention:

[0020] The sintering red mud and Bayer red mud produced in the combined alumina production are transported to the press filter workshop of the red mud yard by pipeline wet method. After dehydration by matching filter press, the filter cake is transported by belt, and then transferred to the tailings reservoir area by loaders and transport vehicles. The moisture content of the red mud after pressure filtration is 28-33%. The red mud attached liquid discharged during the filter press process is directly transported back to the alumina through the pipeline from the filter press workshop, without pumping it back from the tailings pond, which not only reduces the impact of water on the safety and environmental protection of the tailings pond, but also reduces energy consumption. , Equipment consumption.

[0021] When the red mud is stockpiled, the height-to-width ratio of the single-stage side slope 1 outside the storage area is 1:2, and the...

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Abstract

The invention discloses a method for stockpiling red mud generated in the process of producing aluminum oxide by the combination method, comprising the following steps: filter pressing the red mud; then conveying the red mud to a mine waste reservoir for stockpiling. The method is characterized in that red mud obtained by sintering process and red mud obtained by Bayer process evenly mixed and stirred and then the mixture is filter-pressed; in addition, height to width aspect ratio of a blast-proof side slope single stage side slope (1) at the periphery of a stockpiling area is 1:2, vertical height to horizontal width aspect ratio of an average external side slope (2) of a whole stockpiling body is 1:2.8, the slope crest forms a drainage slope (3) of 0.5-1% inwards a stockpiling warehouse. Compared with the prior art, the method of the invention has the advantages of safety, environmental protection, effective use of reservoir storage capacity, settlement of the problem that a large quantity of water takes up reservoir storage capacity and convenient recovery and transportation of the red mud obtained by mixed filter pressing in case of being reused.

Description

Technical field: [0001] The invention belongs to the technical field of red mud stockpiling in combined alumina production. Background technique: [0002] In the present combined method of alumina production, the sintering method red mud is used to build a dam, and the Bayer method red mud is piled up in the dam. Because it is directly stockpiled without pressure filtration, its disadvantage is that slag and water (including rainfall) are mixed together. Due to the poor physical and mechanical properties of red mud stockpiled in the dam, it is easy to cause many safety and environmental risks in the stockyard; at the same time, due to The presence of a large amount of water occupies the volume of the storage yard. In addition, because the Bayer process red mud is in the form of silt, the cost of mining and transportation is high. Invention content: [0003] Technical problem to be solved by the present invention: [0004] A method for stockpiling red mud in combined alu...

Claims

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Application Information

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IPC IPC(8): C02F11/00
Inventor 柳健康李泽云刘德福蔡良钧陈峻王奎龚智远伍良渝王文志刘德宽
Owner GUIZHOU BRANCH CHINA ALUMINUM IND
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