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Method of fast-flotation of bauxite with low Al/Si (aluminum/silicon) ratio

A technology of aluminum-silicon ratio and bauxite, which is applied in the cleaning methods of tools, flotation, chemical instruments and methods, etc., can solve the problems of large return volume of medium ore, small circulation volume, entrainment of ore sludge, etc.

Inactive Publication Date: 2009-09-23
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the shortcomings of the previous method, such as long process flow, serious slime entrainment, large amount of middle ore return, and poor economic benefits, and develop a process with small circulation, high sorting index, high recovery rate, and economical flotation. Trough, a method for rapid flotation of low-alumina-silicon-ratio bauxite with reduced water and reagent consumption

Method used

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  • Method of fast-flotation of bauxite with low Al/Si (aluminum/silicon) ratio
  • Method of fast-flotation of bauxite with low Al/Si (aluminum/silicon) ratio

Examples

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Embodiment 1

[0021] This method was used to conduct a flotation test on a bauxite mine in Henan. Al in this mineral 2 o 3 The content is 63.97, SiO 2 The content is 11.20, and the aluminum-silicon ratio is 5.71.

[0022] Grind the low-aluminum-silicon ratio bauxite to -0.074mm, accounting for 90%, add 2500 g / t of sodium carbonate during the grinding process; add sodium carbonate to adjust the slurry to pH9.5, add inhibitor water glass 150g / t , collector oleic acid 800g / t, the first part of the concentrate with aluminum-silicon ratio above 8.5 is separated after roughing and a beneficiation; inhibitor sodium silicate 150g / t is added to the tailings, collector oleic acid 800g / t, the second part of concentrate is separated by roughing and two beneficiation.

[0023] After adopting the method, a bauxite concentrate with a total recovery rate of 89.8% and an aluminum-silicon ratio of 9.56 can be obtained.

Embodiment 2

[0025] This method was used to carry out the flocculation and sedimentation test on a bauxite mine in Henan. Al in this mineral 2 o 3 The content is 56.24, SiO 2 The content is 11.53, and the aluminum-silicon ratio is 4.88.

[0026] Grind the low-alumina-silicon ratio bauxite to -0.074mm, accounting for 90%, add 2500 g / t of sodium carbonate during the grinding process; add sodium carbonate to adjust the slurry to pH 10, add inhibitor sodium hexametaphosphate 60g / t , the collector oleic acid is 900g / t, and the first part of the concentrate with an aluminum-silicon ratio above 8.5 is separated after rough separation; the inhibitor sodium hexametaphosphate 60g / t is added to the tailings, and the collector oleic acid is 900g / t , the second part of the concentrate is separated by roughing and two beneficiation.

[0027] After adopting the method, a bauxite concentrate with a total recovery rate of 89.05% and an aluminum-silicon ratio of 8.01 can be obtained.

Embodiment 3

[0029] Add 4500 g / t of sodium carbonate during the grinding process; add sodium carbonate to adjust the slurry to pH 10.5, add inhibitor sodium hexametaphosphate 80 g / t during the first flotation process; the remaining steps and conditions are the same as in Example 1.

[0030] After adopting the method, a bauxite concentrate with a recovery rate of 95.13% and an aluminum-silicon ratio of 8.08 can be obtained.

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Abstract

The invention relates to a method of the fast-flotation of bauxite with low Al / Si (aluminum / silicon) ratio, particularly a method for directly separating a part of bauxite concentrate with high floatability, coarse fraction and high Al / Si ratio on the basis of rough flotation or the combination of rough flotation and one-step concentration. The invention not only simplifies the whole technological process and accelerates the flotation, but also reduces the water consumption and reagent consumption and ensures better flotation effect; the invention overcomes the shortcomings of lengthy technological process, complicated operating procedures, high reagent consumption, severe technological slime entrainment, low economic benefit and the like; and the invention develops a novel method having the advantages of low process circulation load, high flotation index and good separating effect and reducing the water consumption and the reagent consumption.

Description

technical field [0001] The invention belongs to the field of mineral processing, and in particular relates to a method for desiliconization of bauxite, in particular to a method for rapid flotation of bauxite with a low aluminum-silicon ratio. Background technique [0002] my country's bauxite obviously has the characteristics of high aluminum, high silicon and low iron. Although, Al in my country's bauxite 2 o 3 The content is relatively high, but due to the high SiO content in the ore 2 , so the aluminum-silicon ratio of the ore is generally lower. 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 ...

Claims

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Application Information

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IPC IPC(8): B03D1/00B08B1/00B03D1/001B03D1/008B03D1/002B03D101/02B03D101/04
Inventor 孙伟胡岳华何平波邓海波刘文莉
Owner CENT SOUTH UNIV
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