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Method of flotation desulfur desilicon in bauxite

A flotation desulfurization and bauxite technology, applied in flotation, aluminate/alumina/aluminum hydroxide purification, solid separation, etc., can solve the problem of large specific surface area, poor pulp dispersion performance, and large amount of flotation agents and other issues, to achieve significant economic benefits and advanced technology

Active Publication Date: 2006-11-29
中铝郑州有色金属研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a kind of can effectively reduce the shortcoming of flotation agent for the disadvantages of poor dispersibility of ore pulp after primary grinding, large specific surface area, large consumption of flotation agent and weak collector performance in the above-mentioned existing technology. A method for efficient flotation desulfurization and desiliconization of sulfur-containing, low-aluminum-silicon-ratio bauxite with dosage, guaranteed flotation concentrate quality, and improved flotation process index

Method used

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Examples

Experimental program
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Embodiment 1

[0019] For the bauxite mines in Chuandongwan-Huihe area of ​​Nanchuan City, raw ore Al 2 o 3 59.74%, SiO 2 11.39%, the ratio of aluminum to silicon is 5.24, and the sulfur content is 1.73%. The specific process of flotation desulfurization and desiliconization is as follows:

[0020] a) One-stage desulfurization process: use a ball mill to grind the bauxite, add 4200 g / t of raw ore sodium carbonate into the ball mill, the fineness of the grinding product is -0.074mm, accounting for 75%, and the overflow concentration of the classifier is 38%. Add 140g / ton of copper sulfate activator, 240g / ton of collector, and 80g / ton of 2# oil air bubble agent into the mixing tank for the ore pulp after grinding. For desulfurization, the pulp concentration of the flotation operation is 14-37%, and the pH of the pulp is maintained at around pH 8.1. A closed-circuit process of one roughing, one beneficiation, and sequential return of medium ore is adopted to produce flotation foam sulfur conc...

Embodiment 2

[0025] For a high-sulfur, high-aluminum-silicon ratio bauxite in Nanchuan City, only one stage of desulfurization process is adopted, and the desulfurization process is as follows:

[0026] Use a ball mill to grind the bauxite, add 4200 g / t of raw ore sodium carbonate into the ball mill, the fineness of the grinding product is -0.074mm, accounting for 72%, the overflow concentration of the classifier is 39.25%, and the pulp after grinding is in the Add 120 g / ton of copper sulfate activator, 260 g / ton of dixanthate collector, and 80 g / ton of 2# oil bubbler into the mixing tank. After fully stirring, feed it into the flotation machine for reverse flotation desulfurization. The pulp concentration of the flotation operation is 14-37%, and the pH of the pulp is maintained at around pH 8.1. The closed-circuit process of primary roughing, secondary beneficiation, primary sweeping, and sequential return of middle ore is adopted to produce flotation foam sulfur concentrate and the baux...

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PUM

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Abstract

A floatation process for bauxite to remove S and Si includes such steps as grinding the crude bauxite, adding the yellow catching agent B, reverse floatation for removing S, grinding, adding the match of saponified fatty acid and naphthenic acid, and forward floatation. The resultant bauxite concentrate can be used to prepare aluminum oxide by Bayer method.

Description

technical field [0001] A bauxite flotation desulfurization and desiliconization method relates to a bauxite flotation method, in particular to a method for desulfurization and desiliconization of sulfur-containing low-grade bauxite. technical background [0002] Bauxite is the main raw material for the aluminum industry, and it is also an important raw material for the production of refractory materials, high-grade abrasives, high-alumina cement, ceramics, chemicals, and medicine. When the bauxite contains sulfur, regardless of the level of sulfur content, it has a great influence on the process stability of Bayer process to produce alumina. The sulfide minerals in bauxite are mainly pyrite, isomer marcasite and colloid pyrite, among which pyrite begins to react with lye at 180 degrees, while marcasite and colloid pyrite are more Easily decomposed by lye to generate S 2- , SO 3 2- , SO 4 2- , S 2 2- , S 2 SO 3 2- , not only causing loss of NaOH, but also S 2- , S...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/00B03D1/004B03D1/002B03D101/02B03D101/04B03D101/00B03D103/02
CPCB03D1/008B03D1/012B03D1/02C01F7/46B03D1/002B03D2201/007B03D2201/02B03D2201/04B03D2203/02Y02P10/20
Inventor 陈湘清李旺兴尹中林晏唯真马俊伟徐祥斌陈志友
Owner 中铝郑州有色金属研究院有限公司
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