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Sintering method red mud and Bayer method red mud mixed dam building method

A technology of sintering method and red mud, which is applied in chemical instruments and methods, sludge treatment, water/sludge/sewage treatment, etc., can solve the problem of high dam construction cost, reduce dam construction cost, improve treatment efficiency, improve The effect of stack height

Active Publication Date: 2010-08-04
GUIZHOU BRANCH CHINA ALUMINUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the Bayer process red mud is difficult to build a dam, it is necessary to use other materials to build a dam around the yard and then stack the Bayer process red mud. One method of building a dam is to directly build an earth-rock dam, and the cost of building a dam is relatively high. Therefore, the problem of stacking Bayer process red mud has always been a problem that plagues the alumina production industry.

Method used

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  • Sintering method red mud and Bayer method red mud mixed dam building method

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Experimental program
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Effect test

Embodiment 1

[0020] A fine sand cofferdam type seepage drainage column is arranged in the dam building, and a cofferdam column 5 with a hollowed-out 3 is built with bricks. The cofferdam column 5 is provided with a φ200mm steel pipe riser 2, and the standpipe 2 is designed It is divided into multiple sections, connected by the connecting flange 1, and the connection is increased during construction. The lower end of the standpipe 2 is connected to the seepage pipe 4. The pipe wall of the standpipe 2 is provided with a seepage hole 7 with a diameter of 10mm, and the seepage hole 7 is wrapped There is a gauze, the brick joints of the cofferdam cylinder 5 and the cavity formed by the cofferdam cylinder 5 and the standpipe 2 are filled with fine sand 6, and the particle size of the fine sand is controlled to be 0.5mm.

[0021] The imported gibbsite ore Bayer process red mud and sintering process red mud were mixed according to the weight ratio of dry red mud at 0.43:1, and then the dam was buil...

Embodiment 2

[0023] A fine sand cofferdam type seepage drainage column is arranged in the dam building, and a cofferdam column 5 with a hollowed-out 3 is built with bricks. The cofferdam column 5 is provided with a φ210mm steel pipe riser 2, and the standpipe 2 is designed It is divided into multiple sections, connected by the connecting flange 1, which is connected and raised during construction. The lower end of the standpipe 2 is connected to the seepage pipe 4. The wall of the standpipe 2 is provided with a water seepage hole 7 with a diameter of 12 mm. The water seepage hole 7 is wrapped There is gauze, the brick joints of the cofferdam cylinder 5 and the cavity formed by the cofferdam cylinder 5 and the riser 2 are filled with fine sand 6, and the particle size of the fine sand is controlled to be 0.08mm.

[0024] The imported gibbsite ore Bayer red mud and sintering red mud are mixed according to the weight ratio of dry red mud at a ratio of 1:1, and then the dam is built. The compre...

Embodiment 3

[0026] A fine sand cofferdam type seepage drainage column is arranged in the dam building, and a cofferdam column 5 with a hollowed-out 3 is built with bricks. The cofferdam column 5 is provided with a φ198mm steel pipe riser 2, and the standpipe 2 is designed It is divided into multiple sections, connected by the connecting flange 1, which is connected and raised during construction. The lower end of the standpipe 2 is connected to the seepage pipe 4, and the wall of the standpipe 2 is provided with a seepage hole 7 with a diameter of 8mm, and the seepage hole 7 is wrapped There is a gauze, the brick joints of the cofferdam cylinder 5 and the cavity formed by the cofferdam cylinder 5 and the riser 2 are filled with fine sand 6, and the particle size of the fine sand is controlled to be 0.2mm.

[0027] The imported gibbsite ore Bayer red mud and sintering red mud were mixed according to the weight ratio of dry red mud at 2.33:1, and then the dam was built. The compressive stren...

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Abstract

This invention discloses a method for damming by using mixed mud from sintering process and Bayer process. In this invention, the gibbsite Bayer process and sintering process red mud are mixed in the ratio of (0.43-2.33):1(dried mud) are used for the damming. Bricks are used for building cofferdam columns, in which are placed the vertical tubes which are then connecting filtration tubes and water-drainage ditch. There are permeating holes on the walls of the tubes. Between the column and its tube filled is fine sands. Due to the material of the dam is the same as the material decking-up, it makes simple building process and saving area for decking up Bayer process red mud. Advantages are low cost and saving raw materials.

Description

technical field [0001] The invention relates to a method for building a dam by mixing sintering red mud and Bayer red mud, and belongs to the technical field of alumina production. Background technique [0002] Red mud is reddish-brown powdery mud-like, high water content, strong alkaline solid waste left over from bauxite after various physical and chemical treatments to produce alumina. Most alumina production enterprises use dams to store Red mud can be processed in various ways, and there are various storage methods such as wet method, semi-dry method and dry method. According to the different production methods of alumina, red mud is generally divided into sintering red mud and Bayer red mud, and its output varies with ore grade, production method, and technical level. 1.0-1.8 tons of red mud are produced per ton of alumina. Domestic alumina production methods mainly include: combined method (sintering method and Bayer method connected in parallel or in series), sinte...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/00C01F7/02
Inventor 王平升贾海龙孙明光付毅王劼张哲新高飞李明张军
Owner GUIZHOU BRANCH CHINA ALUMINUM IND
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