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Application of collecting agent in reverse floatation of bauxite

A collector, bauxite technology, applied in flotation, solid separation and other directions, can solve problems such as constraints, and achieve the effect of small amount of foam, good collection performance, and good selection ability

Active Publication Date: 2013-06-19
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the reverse flotation has not yet developed a high-efficiency and high-selectivity collector, which is the most important problem restricting the development of the process

Method used

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  • Application of collecting agent in reverse floatation of bauxite
  • Application of collecting agent in reverse floatation of bauxite
  • Application of collecting agent in reverse floatation of bauxite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The method of the present invention is used to test pure minerals of diaspore and kaolinite.

[0023] The single mineral flotation experiment was carried out on the XFG hanging cell flotation machine. Weigh 2g of minerals into a 40ml flotation tank each time, add 30ml of distilled water, adjust the slurry for 1min, adjust the pH value with HCl or NaOH for 3min, use PHS-3C precision pH meter to measure the pH value, add quaternary phosphate salt and stir 3min, flotation 4min, the flotation process adopts manual foam scraping. After the flotation is completed, the scraped foam (concentrate) is dried and weighed, and the recovery rate is calculated.

[0024] After adopting this method, it can be obtained that the recovery rate of the new collector for kaolinite in the range of pH=5-7 is above 90%, and the recovery rate for diaspore is below 50%.

Embodiment 2

[0026] This method is used to carry out flotation tests on a bauxite ore with an aluminum-silicon ratio of 5-5.5 in Henan.

[0027] Grind the bauxite to -0.074mm, accounting for 88%, add 1000 g / t of sodium carbonate during the grinding process; then add 200 g / t of water glass or 60 g / t of sodium hexametaphosphate as inhibitor and collector The quaternary phosphate salt is 100g / t, roughed, and then gradually reduced the agent for 4 times of beneficiation to obtain the concentrate.

[0028] After using this method, you can get Al 2 O 3 The recovery rate is 88%, and the aluminum to silicon ratio is greater than 8.

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Abstract

The invention relates to the application of a collecting agent in reverse floatation of bauxite. The application of quaternary phosphonium salt in the reverse floatation of the bauxite is developed in full accordance with the characteristics of low-grade bauxite and the strong electrostatic attraction of the quaternary phosphonium salt to silicate minerals, so selective collection of diasporite and kaolinite by using the collecting agent is realized. The agent has higher selecting capability and collecting performance than the conventional reverse floatation collecting agents such as primary amine, tertiary amine and quaternary ammonium, and has the advantages of small dosage, good index, environmental friendliness and the like. When the agent is used for treating the bauxite of which theratio of aluminum to silicon in raw ore is 5 to 5.5, the ratio of the aluminum to the silicon in obtained finished ore is more than 8 and the recovery rate of Al2O3 is more than 88 percent.

Description

Technical field [0001] The invention belongs to the field of beneficiation, and relates to the application of a collector for reverse flotation of bauxite, particularly in the field of desiliconization of bauxite with a low aluminum-silicon ratio. Background technique [0002] my country's bauxite has the characteristics of high aluminum, high silicon, and low aluminum to silicon ratio. Among the 255 mining areas in 7 provinces including Shanxi, Henan, Guangxi, Guizhou, Shandong, Sichuan, and Yunnan, which account for 96% of my country’s total bauxite reserves, the average grade (mass fraction) of bauxite is: Al 2 O 3 61.99%, SiO 2 10.4%, Fe 2 O 3 7.73%. The average aluminum-silicon ratio is 5.96, and the aluminum-silicon ratio of nearly half of the bauxite reserves is 4-6. The dissolution of diaspore requires higher temperature, pressure and caustic ratio conditions; in addition, due to the low aluminum-silicon ratio of the ore, the economic benefits of using this ore as the ra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/02B03D1/014B03D101/02
Inventor 胡岳华孙伟陈攀
Owner CENT SOUTH UNIV
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