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Low-temperature ceramic curing agent of red mud from Bayer process

A Bayer process red mud and low-temperature ceramic technology, which is applied in cement production and other directions, can solve the problems of Bayer process red mud storage, dam collapse, cross-dam and other problems, and achieves a solution that is beneficial to environmental protection, low cost, and solves safety problems. Effect

Inactive Publication Date: 2013-08-28
山西鑫秀工矿废渣利用有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a low-temperature ceramic curing agent for Bayer red mud, so as to solve the problems of collapse and cross-dam risks in Bayer red mud stockpiling and dam building

Method used

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  • Low-temperature ceramic curing agent of red mud from Bayer process

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Effect test

Embodiment 1

[0022] A low-temperature ceramic curing agent for Bayer process red mud, prepared from the following raw materials in parts by weight:

[0023] Aluminosilicate waste slag: 20 parts of yellow phosphorus slag, 50 parts of fly ash, 30 parts of blast furnace slag;

[0024] Industrial by-product gypsum: 20 parts of phosphogypsum, 130 parts of desulfurized gypsum;

[0025] Exciting materials: 50 parts of lime, 100 parts of carbide slag, 50 parts of kiln dust;

[0026] Water reducer: 2.0 parts of calcium lignosulfonate, 0.4 part of naphthalene sulfonate, 0.1 part of polycarboxylic acid;

[0027] Flocculant: 3.0 parts of polyaluminum sulfate, 1.5 parts of ferric chloride, 0.5 parts of polyacrylamide;

[0028] Retarder: 1.0 parts of borax, 0.5 parts of sodium phosphate, 0.5 parts of sodium fluoride, and 3 parts of calcium nitrate.

[0029] The production method of the low-temperature ceramic solidifying agent of Bayer process red mud described in the embodiment of the present invent...

Embodiment 2

[0035] A low-temperature ceramic curing agent for Bayer process red mud, prepared from the following raw materials in parts by weight:

[0036] Aluminosilicate waste residue: 20 parts of calcined tailings, 50 parts of calcined coal gangue, 30 parts of calcined red mud;

[0037] Industrial by-product gypsum: 10 parts of fluorine gypsum, 10 parts of citric acid gypsum;

[0038] Exciting materials: 30 parts of lime, 10 parts of carbide slag, 10 parts of kiln dust;

[0039] A kind of production method of the low-temperature ceramic solidifying agent of Bayer method red mud described in the embodiment of the present invention comprises the following steps:

[0040] Mix aluminosilicate waste slag, industrial by-product gypsum, and excitation materials according to the above ratio, age for 5 hours, and then dry. The test moisture content is 0.4%, put it into a ball mill for grinding, and the test powder fineness is 0.08mm , and the sieve residue is 3.0%, which becomes the product d...

Embodiment 3

[0043] A low-temperature ceramic curing agent for Bayer process red mud, prepared from the following raw materials in parts by weight:

[0044] Aluminosilicate waste slag: 50 parts of blast furnace slag, 40 parts of steel slag, 10 parts of thermal manganese slag;

[0045] Industrial by-product gypsum: 10 parts of wet-process manganese slag, 10 parts of lead-zinc slag, 100 parts of desulfurized gypsum;

[0046] Exciting materials: 50 parts of lime, 80 parts of carbide slag, 20 parts of kiln dust;

[0047] Water reducing agent: 0.2 parts of sodium lignosulfonate, 0.8 parts of sodium humate, 1.0 parts of polycarboxylic acid;

[0048] Flocculants: 1.3 parts of polymeric aluminum sulfate, 1.2 parts of polymeric iron sulfate;

[0049] Retarder: 0.5 parts of sodium fluoride, 2.0 parts of calcium nitrate;

[0050] A kind of production method of the low-temperature ceramic solidifying agent of Bayer method red mud described in the embodiment of the present invention comprises the fo...

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Abstract

The invention relates to a low-temperature ceramic curing agent of red mud from a Bayer process. The low-temperature ceramic curing agent is prepared by the following raw materials by weight parts: 100 aluminosilicate residues, 20-150 industrial by-product gypsum, 50-200 excited materials, 0-3.0 water-reducing agent, 0-5.0 flocculating agent and 0-5.0 retarder. The production method thereof comprises the following steps: (1) processing main raw materials; (2) preparing additives; and (3) preparing a curing agent. The invention has the beneficial effects that (1) all components of the curing agent can irreversibly react with the red mud; compared with the prior gelled material, the invention does not use cement, base excited materials and expensive high molecular polymers, thereby achieving low cost; (2) the invention uses the industrial residues as the raw materials to cure the red mud so as to achieve the aim of treating a waste with another waste; no secondary waste is exhausted in a production process and an application process so as to benefit environmental protection; and (3) the invention can thoroughly solve the safety problem of a red mud library after curing the red mud.

Description

technical field [0001] The invention relates to a low-temperature ceramic curing agent for Bayer process red mud, which belongs to the technical field of building materials and alumina production. Background technique [0002] Red mud is the solid waste slag discharged during the alumina production process. According to the different alumina production methods, it is divided into sintering method, Bayer method and mixed method red mud. According to estimates, about 1.0-1.5 tons of red mud is produced for every ton of alumina produced, and each ton of dried red mud is accompanied by 3-4 m3 of alkali-containing waste liquid. With the development of the aluminum industry and the reduction of the grade of aluminum ore, the discharge of red mud will increase, and safe stockpiling has become a major constraint factor for the sustainable development of enterprises. Because the sintering method and the mixed method red mud contain β-dicalcium silicate similar to cement, during the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B7/21
CPCY02P40/10
Inventor 张召述马海平夏举佩陈惠康苏俊哲马秀麟
Owner 山西鑫秀工矿废渣利用有限公司
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