Industrial treatment method of sintering red mud

A technology of calcification treatment and carbonization treatment is applied in the field of industrialized treatment of sintered red mud to achieve the effect of saving water resources

Inactive Publication Date: 2018-07-20
BEIJING HUASUO TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of how to consume red mud at low cost and on a large scale so as to eliminate the environmental problems caused by red mud, and provide a method for industrialized treatment of sintered red mud

Method used

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  • Industrial treatment method of sintering red mud

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Effect test

Embodiment 1

[0023] Such as figure 1 As shown, the method for industrially treating sintered red mud of the present invention includes the following steps:

[0024] (1) Separation and washing: the sintered red mud and the crude liquid are quickly separated and washed to obtain the red mud slurry. The sintered red mud produced in the process of alumina production is mixed with the crude liquid, which is an alkaline aqueous solution. When the sintered red mud is processed, the sintered red mud needs to be washed and mixed with the crude liquid. Separate.

[0025] (2) Mixing: The red mud slurry is fed into the mill, and lime is added to the red mud slurry for grinding and mixing uniformly to obtain a mixed red mud slurry. Specifically, the mass concentration of the mixed red mud slurry is 40%, the ratio of the calcium oxide content in the added lime to the sodium oxide content in the red mud slurry is 2, and the particle size of the red mud after grinding is 120 mesh, so The mass concentration ...

Embodiment 2

[0033] The industrialized method for processing sintered red mud of the present invention includes the following steps:

[0034] (1) Separation and washing: the sintered red mud and the crude liquid are quickly separated and washed to obtain the red mud slurry. The sintered red mud produced in the process of alumina production is mixed with the crude liquid, which is an alkaline aqueous solution. When the sintered red mud is processed, the sintered red mud needs to be washed and mixed with the crude liquid. Separate.

[0035] (2) Mixing: The red mud slurry is fed into the mill, and lime is added to the red mud slurry for grinding and mixing uniformly to obtain a mixed red mud slurry. Specifically, the mass concentration of the mixed red mud slurry is 40%, the ratio of the calcium oxide content in the added lime to the sodium oxide content in the red mud slurry is 2.5, and the particle size of the red mud after grinding is 160 mesh, so The mass concentration of sodium oxide in the...

Embodiment 3

[0043] The industrialized method for processing sintered red mud of the present invention includes the following steps:

[0044] (1) Separation and washing: the sintered red mud and the crude liquid are quickly separated and washed to obtain the red mud slurry. The sintered red mud produced in the process of alumina production is mixed with the crude liquid, which is an alkaline aqueous solution. When the sintered red mud is processed, the sintered red mud needs to be washed and mixed with the crude liquid. Separate.

[0045] (2) Mixing: The red mud slurry is fed into the mill, and lime is added to the red mud slurry for grinding and mixing uniformly to obtain a mixed red mud slurry. Specifically, the mass concentration of the mixed red mud slurry is 43%, the ratio of the calcium oxide content in the added lime to the sodium oxide content in the red mud slurry is 3, and the particle size of the red mud after grinding is 200 mesh, so The mass concentration of sodium oxide in the m...

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Abstract

The invention discloses an industrial treatment method for sintering red mud. The industrial treatment method of the sintering red mud is characterized by comprising the following steps of (1) conducting separation and washing, wherein the sintering red mud is rapidly separated from raw liquor and washed, and red mud slurry is obtained; (2) conducting mixing, lime is added to the red mud slurry, grinding and stirring are conducted, and then the red mud slurry mixture is obtained; (3) conducting calcification, wherein the red mud slurry mixture is calcified, and then calcified red mud slurry isobtained and the like. The main ingredients of tailings obtained after the sintering red mud is treated are calcium silicate and calcium carbonate, the tailings can be directly used for the cement industry and can also be used for soil treatment, and therefore harmless utilization of the red mud in the aluminum oxide production process is achieved. The content of Na2O in the tailings generated after the sintering red mud is treated is below 1%, and the environment-friendly requirement is met.

Description

Technical field [0001] The invention relates to the field of environmental protection, and specifically refers to a method for industrially treating sintered red mud. Background technique [0002] Since 2007, my country's aluminum industry has entered a stage of rapid development. By 2017, my country's annual output of alumina was about 65 million tons. However, a series of environmental problems have followed. For example, a large amount of high-alkaline red mud will be produced in the alumina production process. If an average of 1 ton of alumina is produced, 1 to 2 tons of red mud will be produced. The annual mud discharge has reached the level of 70 million tons per year, and the total red mud stockpile in the country is about 800 million tons. The PH value of red mud is between 12 and 14. This kind of red mud strongly corrodes organisms and metal materials and causes serious damage to the environment. Therefore, how to consume red mud at low cost and on a large scale has bec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00
CPCB09B3/00
Inventor 郭力孙建峰施建明王攀陈帅
Owner BEIJING HUASUO TECH
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