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Desulfurization method and device for bauxite

A technology for bauxite and aluminum concentrate, applied in chemical instruments and methods, wet separation, solid separation, etc., can solve the problems of large-scale industrial application of alumina, low leaching efficiency, and high processing cost, which can improve the Continuity and stability, lower investment cost and operating cost, simple operation effect

Active Publication Date: 2017-01-18
GUIZHOU BRANCH CHINA ALUMINUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Patents 03135157.3 and 200810230200.0 adopt the desulfurization and roasting desulfurization methods in the alumina process. The desulfurization and roasting desulfurization in the alumina process can usually only process high-sulfur bauxite with low sulfur content, and the processing cost is high. This method has not yet been seen. Large-scale industrial application of alumina production in high-sulfur bauxite
In addition, roasting desulfurization will produce a certain amount of SO 2 gas, which has a certain impact on the environment
[0006] The bioleaching of high-sulfur bauxite has the advantages of low investment, high resource utilization rate, and environmental friendliness. Sulfur bauxite is an oxidized ore. The conventional sulfide ore bioleaching method to treat high-sulfur bauxite will have problems such as ore compaction and low leaching efficiency.

Method used

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  • Desulfurization method and device for bauxite
  • Desulfurization method and device for bauxite
  • Desulfurization method and device for bauxite

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The high-sulfur bauxite ore under coal in a certain place in Henan was used as the test sample. The chemical composition of the ore is shown in Table 1.

[0035] Table 1 High-sulfur bauxite mine under coal in a certain place in Henan

[0036] Element al 2 o 3

SiO 2

Fe 2 o 3

TiO 2

K 2 o

Na 2 o

CaO MgO S C reduce content / % 63.46 12.35 2.64 2.96 1.10 0.025 0.81 0.25 1.21 1.80 13.40

[0037] The test flow is a rapid chemical desulfurization bottom flow connected in parallel to two of the above-mentioned equipments for bioleaching desulfurization.

[0038] Process parameters: rapid chemical desulfurization grinding fineness is 78%-200 mesh, natural pH value of ore pulp, chemical desulfurization agent dosage 400g / t, desulfurization temperature is normal temperature; chemical desulfurization bottom flow enters the second stage mill through the discharge port, to the grinding The fineness is 92%-200 ...

Embodiment 2

[0046] A high-sulfur bauxite ore in Zunyi was used as the test sample. The chemical composition of the ore is shown in Table 3.

[0047] Table 3 High-sulfur bauxite mine in Zunyi

[0048] Element Al 2 o 3

SiO 2

Fe 2 o 3

TiO 2

K 2 o

Na 2 o

CaO MgO S reduce content / % 65.61 7.97 6.19 2.88 1.22 0.04 0.13 0.14 1.63 13.79

[0049] The test process is a rapid chemical desulfurization bottom flow connected in parallel to four of the above-mentioned equipment for bioleaching desulfurization.

[0050] Process parameters: rapid chemical desulfurization grinding fineness is 65%-200 mesh, natural pH value of ore pulp, chemical desulfurization agent dosage 300g / t, desulfurization temperature is normal temperature; chemical desulfurization bottom flow enters the second stage mill through the discharge port, to the grinding The fineness is 90%-200 mesh. After entering the stirring channel, inoculate Thiobacillus ferr...

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Abstract

The invention relates to a bauxite desulphurization method and device, in particular to a chemo-biological desulphurization method and device of high sulfur bauxite. The method is characterized in that the desulphurization process includes the steps of 1, adding chemical desulfurizing agent to perform chemical desulphurization; 2, inoculating bio-leached strain to perform bio-leaching desulphurization; 3, after bio-leaching desulphurization, filtering and washing ore pulp to obtain aluminum concentrate. The bauxite desulphurization method and device has the advantages that operation is simple, recovery rate of aluminum oxide can be significantly increased, industrial production can be more continuous and stable, investment and operation costs in high sulfur bauxite desulphurization are reduced, and high sulfur bauxite can be industrially desulfurized.

Description

technical field [0001] A method and device for desulfurizing bauxite, in particular to a method and device for chemical desulfurization and biological desulfurization of high-sulfur bauxite. Background technique [0002] High-sulfur bauxite is an important potential available resource for the aluminum industry, accounting for a relatively large proportion of China's bauxite resources, mainly distributed in western Guangxi, southeastern Yunnan, central Guizhou, northern Guizhou, western Henan, southeastern Sichuan, northern Hubei and Lu Zhong. According to statistics, the proven high-sulfur bauxite reserves exceed 800 million tons, and the prospective reserves are about 2 billion tons. The main sulfide minerals in high-sulfur bauxite exist in the form of pyrite, which also contains its allotrope marcasite and pyrrhotite, and some high-sulfur bauxite contains a certain amount of sulfate. [0003] Sulfur in bauxite is seriously harmful to alumina production, causing corrosion...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03B7/00B03B11/00
Inventor 陈湘清李花霞吴国亮张建强周杰强马俊伟刘晰李素敏陈占华郭鑫胡秋云
Owner GUIZHOU BRANCH CHINA ALUMINUM IND