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Sulphur-containing bauxite gravity concentration and desulphurization method

A bauxite and pulp technology, which is applied in the field of mineral processing engineering, can solve the problems of difficulty in concentration and filtration of flotation concentrate foam, high production cost, failure to popularize and apply, etc. Effect

Inactive Publication Date: 2019-02-12
湖南绿脉环保科技股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The above desulfurization schemes of flotation method and magnetization roasting method for high-sulfur bauxite have problems such as difficulties in flotation concentrate foam concentration and filtration and high production costs, and have not been popularized and applied in production.
[0012] There are no reports on the research and patents on the separation and treatment of sulfur-containing bauxite by gravity separation

Method used

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  • Sulphur-containing bauxite gravity concentration and desulphurization method

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Effect test

Embodiment 1

[0034] Take the high-sulfur bauxite with a sulfur grade of 4.13% (that is, the mass percentage content of S in the bauxite is 4.13%), and carry out gravity desulfurization, including the following steps:

[0035] 1. Use a crusher to first crush the high-sulfur bauxite ore, and then use a ball mill to grind the ore until the particle size is less than 0.074mm. The yield accounts for 50%, and the high-sulfur bauxite raw ore powder is obtained;

[0036] 2. The high-sulfur bauxite raw ore powder obtained by grinding is adjusted into pulp with water, and the solid concentration of the pulp is 18%, so as to obtain the high-sulfur bauxite raw ore pulp;

[0037] 3. Use spiral chute for gravity separation and roughing, remove sulfur-containing mineral middlings from the high-sulfur bauxite raw ore slurry, and obtain bauxite roughing products, and the separated high-density material is sulfur-containing middling minerals;

[0038] 4. Use the spiral chute for gravity separation and conce...

Embodiment 2

[0045] Take the high-sulfur bauxite with a sulfur grade of 1.45%, and carry out gravity desulfurization, including the following steps:

[0046] 1. Use a crusher to first crush the high-sulfur bauxite ore, and then use a high-pressure roller mill to grind the ore until the particle size is less than 0.074mm. The yield accounts for 65%, and the high-sulfur bauxite raw ore powder is obtained;

[0047] 2, the high-sulfur bauxite raw ore slag obtained by grinding is adjusted into a slurry with a mass percentage concentration of 18% liquid alkali solution (liquid alkali solution is sodium hydroxide solution), and the solid concentration of the slurry is 20%, obtaining high Sulfurite raw ore slurry;

[0048] 3. Use spiral chute for gravity separation and roughing, remove sulfur-containing mineral middlings from the high-sulfur bauxite raw ore slurry, and obtain bauxite roughing products, and the separated high-density material is sulfur-containing middling minerals;

[0049] 4. Use...

Embodiment 3

[0057] Take the high-sulfur bauxite with a sulfur grade of 1.03%, and carry out gravity desulfurization, including the following steps:

[0058] 1. Use a high-pressure roller mill to crush and grind the ore until the particle size is less than 0.074mm. The yield accounts for 80%, and the raw ore powder of high-sulfur bauxite is obtained;

[0059] 2. The high-sulfur bauxite raw ore powder obtained by grinding is adjusted into pulp with water, and the solid concentration of the pulp is 12%, so as to obtain the high-sulfur bauxite raw ore pulp;

[0060] 3. Use a spiral concentrator to carry out gravity separation and roughing, remove the middle ore of sulfur-containing minerals from the raw ore slurry of high-sulfur bauxite, and obtain the rough separation product of bauxite, and the separated material with high density is middle ore of sulfur-containing minerals ;

[0061] 4. Using a spiral concentrator for re-election and concentration, the medium ore of sulfur-containing mine...

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Abstract

The invention belongs to the technical field of mineral process engineering, and specifically discloses a sulphur-containing bauxite gravity concentration and desulphurization method. The sulphur-containing bauxite gravity concentration and desulphurization method comprises the following steps of: modulating water for sulphur-containing bauxite mineral powder and / or a liquid caustic soda solutionand / or seeded precipitation spent liquor into ore pulp, adopting gravity concentration equipment to perform gravity concentration on the sulphur-containing bauxite ore pulp, and performing gravity concentration to separate and remove sulphur-containing minerals from the sulphur-containing bauxite ore pulp, wherein gravity-concentration operation is any one or two or more of roughing operation, selection operation and scavenging operation. The sulphur-containing bauxite gravity concentration and desulphurization method adopts a low-cost gravity concentration method to treat sulphur-containing bauxite, and a separation liquid medium needed in the gravity concentration process is water, liquid caustic soda solution and the seeded precipitation spent liquor, which is in common use with a solution in an aluminium oxide production process, and therefore, the generated bauxite concentrate does not need high-cost filtration operation, only needs simple concentration, and can be directly fed into an aluminium oxide production process, the production cost of producing bauxite concentrate and an aluminium oxide product is reduced, and the technical indexes of the aluminium industry are improved.

Description

technical field [0001] The invention relates to the technical field of mineral processing engineering, in particular to a method for gravity separation and desulfurization of sulfur-containing bauxite. Background technique [0002] The sulfur component in bauxite is a harmful impurity in the alumina production process. In various smelting methods for alumina production (Bayer method, mixing method, sintering method), S will react with alkali to form Na 2 S and FeS, and Na 2 S oxidation to Na 2 SO 4 , when evaporating carbon mother liquor, Na 2 SO 4 Precipitation in the form of alum carbonate causes scaling on the surface of the evaporator, reduces heat transfer efficiency, blocks pipeline containers, affects normal production, and increases alkali consumption and cost in the production process. my country's reference industrial index for accumulation type diaspore type bauxite ore is sulfur content ≤ 0.3%. There are also a certain amount of diaspore bauxite with high s...

Claims

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Application Information

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IPC IPC(8): B03B9/00
CPCB03B9/00
Inventor 邓海波陈湘清陈黎军邹春林陈和清
Owner 湖南绿脉环保科技股份有限公司
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