High-sulfur bauxite flotation and desulphurization method

A high-sulfur bauxite and flotation technology, applied in flotation, solid separation, etc., can solve problems such as equipment corrosion, pyrite poor floatability, flotation equipment and slurry pipeline corrosion, etc., to achieve the elimination of corrosion, High-sulfur bauxite flotation desulfurization process with high efficiency and low dosage of chemicals

A high-sulfur bauxite and flotation technology, applied in flotation, solid separation, etc., can solve problems such as equipment corrosion, pyrite poor floatability, flotation equipment and slurry pipeline corrosion, etc., to achieve the elimination of corrosion, High-sulfur bauxite flotation desulfurization process with high efficiency and low dosage of chemicals

CN103272701AActive Publication Date: 2013-09-04GUIZHOU BRANCH CHINA ALUMINUM IND
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] In a high-sulfur bauxite mine in Chongqing, the original ore contains 2.1% sulfur. Research on technological mineralogy shows that pyrite accounts for 70% of the total sulfide minerals in the ore, and pyrite accounts for about 30%. High sulfur bauxite of iron ore. The ore is ground with a wet ball mill, so that particles with a particle size of 0.074mm account for about 65%. During the grinding process, lime is added to adjust the pH value of the slurry to about 6.7 for flotation (the pH value of the slurry is 3.9 when no lime is added), and lime The dosage is 2.3kg / t raw ore. Desulfurization flotation includes one roughing, one sweeping and three refining. Sodium sulfide is added during the roughing process, the dosage is 120g / t raw ore, and then butyl xanthate is added, the dosage is 40g / t raw ore, and then foaming agent is added for flotation. Sweeping operations are added according to a quarter of the total amount of butyl xanthate; butyl xanthate is not added to ...

Embodiment 2

[0019] In a high-sulfur bauxite mine in Guizhou, the raw ore contains 1.8% S, and technological mineralogy research shows that pyrite accounts for 85% of the total sulfide minerals in the ore, and gelatinous pyrite accounts for about 15%. The ore is ground with a wet ball mill, so that the particles with a particle size of 0.074mm account for about 75%. During the grinding process, the pH value of the slurry is about 4.2. During the closed-circuit test, lime is added to the circulating water to adjust the pH of the circulating water to about 9.5 and return to the grinding and flotation operations. The lime consumption is 3.8kg / t raw ore, and the pH of the flotation pulp is about 7.1. Desulfurization flotation includes one roughing, one sweeping and three refining. Sodium sulfide is added during the roughing process, the dosage is 240g / t raw ore, then butyl xanthate is added, the dosage is 30g / t raw ore, and then foaming agent is added for flotation. Sweeping operations are a...

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Abstract

The invention relates to a high-sulfur bauxite flotation and desulphurization method. The high-sulfur bauxite flotation and desulphurization method comprises the following steps of adding lime in the raw ore grinding process, controlling potential of hydrogen (pH) of ore pulp to be in a range of 6-8 and sequentially adding an activating agent, a collecting agent and a foaming agent in the ore pulp to perform flotation. By adopting the high-sulfur bauxite flotation and desulphurization method, the sulfur content of aluminum copper concentrate can be reduced to be below 0.3%under the condition of low collecting agent using amount. Compared with existing high-sulfur bauxite flotation and desulphurization technologies, the high-sulfur bauxite flotation and desulphurization method is low in agent using amount and good in desulphurization effect, corrosion of an acid environment formed by the ore pulp to devices is eliminated, and the high-sulfur bauxite flotation and desulphurization process is efficient and stable.

Description

technical field [0001] The invention relates to a flotation desulfurization method for bauxite, in particular to a flotation desulfurization method for high-sulfur bauxite. Background technique [0002] Pre-flotation desulfurization of bauxite before alumina production is a way of desulfurization of bauxite. The flotation method is used to desulfurize high-sulfur bauxite. In terms of the pH value environment of the flotation pulp, it is mainly The natural acidic pH value environment of high sulfur bauxite formation and Na 2 CO 3 Adjust to an alkaline pH environment for both. [0003] The sulfide minerals in high-sulfur bauxite are often easily oxidized. After grinding, the pulp can form a strong acidic environment with a pH value of about 4.0. The pH environment of the pulp is conducive to the flotation of pyrite, so the chemical consumption is often low , the index is better, and the existing high-sulfur bauxite flotation desulfurization is generally carried out in this ...

Claims

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Application Information

Patent Timeline
04 Sep 2013
Publication
CN103272701A
IPC
B03D1/00; B03D103/02
Inventors
丁安平; 吴熙群