Bauxite desulphurization method and device

A desulfurization device, bauxite technology, 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, and achieve continuous improvement. performance and stability, reducing investment costs and operating costs, and simple operation

Active Publication Date: 2014-04-09
GUIZHOU BRANCH CHINA ALUMINUM IND
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  • Claims
  • Application Information

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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, roast

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  • Bauxite desulphurization method and device
  • Bauxite desulphurization method and device

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[0033] Example 1

[0034] Taking a high-sulfur bauxite ore under coal in a certain area of ​​Henan Province as the test ore sample, the chemical composition of the ore is shown in Table 1.

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

[0036] ingredientAl 2 O 3 SiO 2 Fe 2 O 3 TiO 2 K 2 O Na 2 O CaO MgOSC Discretionary content / %63.4612.352.642.961.100.0250.810.251.211.8013.40

[0037] The test process consists of a section of rapid chemical desulfurization underflow in parallel with two of the equipments for bioleaching desulfurization.

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

Example Embodiment

[0045] Example 2

[0046] Taking a high-sulfur bauxite ore in Zunyi as the test ore sample, the chemical composition of the ore is shown in Table 3.

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

[0048] ingredientAl 2 O 3 SiO 2 Fe 2 O 3 TiO 2 K 2 O Na 2 O CaO MgOS Discretionary content / %65.617.976.192.881.220.040.130.141.6313.79

[0049] The test process consists of a section of rapid chemical desulfurization underflow in parallel with four of the equipments for bioleaching desulfurization.

[0050] Process parameters: rapid chemical desulfurization grinding with a fineness of 65%-200 mesh, natural pulp pH value, chemical desulfurization agent dosage 300g / t, desulfurization temperature at room temperature; chemical desulfurization underflow 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 ferrooxidans, adjust the pH value of the slurry to 2.0, and use a pump to...

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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 desulfurization of bauxite, in particular to a method and device for chemical and biological desulfurization of high-sulfur bauxite. Background technique [0002] High-sulfur bauxite is an important potential usable resource in the aluminum industry. It accounts for a large proportion of China's bauxite resources. It is mainly distributed in western Guangxi, southeastern Yunnan, central Guizhou, northern Guizhou, western Henan, and southeastern Sichuan, northern Hubei and Luzhong. According to statistics, the proven reserves of high-sulfur bauxite are over 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, and also contain marcasite and pyrrhotite allotropes. Some high-sulfur bauxite contains a certain amount of sulfate. [0003] Sulfur in bauxite is a serious hazard to alumina production, causing corrosion of pipelines and equipment; ...

Claims

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Application Information

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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
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