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Gradient floatation method for bauxite

A bauxite and gradient technology, which is applied in the field of bauxite flotation with low aluminum-silicon ratio and gradient flotation of bauxite, can solve the problem of difficult flotation and affect the normal flotation recovery of bauxite flotation process Problems such as rate index, tank drop, etc., to achieve the effect of improving the flotation recovery index

Inactive Publication Date: 2007-05-09
CENT SOUTH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In the existing bauxite flotation methods, there are relatively coarse-grained (0.075mm-0.15mm) bauxites that are difficult to float during the flotation roughing process, or fall out of the trough during the beneficiation process after flotation. This phenomenon seriously affects the normal operation of the bauxite flotation process and the flotation recovery rate index.

Method used

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  • Gradient floatation method for bauxite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A bauxite mine in Henan, the raw ore contains Al 2 o 3 55.10%, and the aluminum-silicon ratio (A / S) is 4.67.

[0020] The process system is as follows: the particle size of the grinding product is -0.074mm, accounting for about 88% to 92%, the pH of the flotation system is adjusted to pH 8.5 to 9.0 by using sodium carbonate, and flotation is carried out by adding dispersion inhibitors and combined collectors. The flotation process is 2 roughing, 1 sweeping and 2 fine, and adopts the technical scheme of step-by-step flotation, and the pulp concentration of roughing 1 is controlled to be ≥35%. The closed-circuit test indicators are shown in Table 1.

[0021]

Embodiment 2

[0023] A bauxite mine in Henan, the raw ore contains Al 2 o 3 55.96%, and the aluminum-silicon ratio (A / S) is 4.72.

[0024] The process system is as follows: the particle size of the grinding product is -0.074nm, accounting for about 88% to 92%, the pH of the flotation system is adjusted to pH 8.5 to 9.0 by using sodium carbonate, and inorganic salt dispersion inhibitors and combined collectors are added. flotation.

[0025] In the 1t / d-scale continuous selection expansion test, the flotation process is 2 roughing, 1 sweeping and 3 fine, and adopts the technical scheme of step-by-step flotation, and the pulp concentration of roughing 1 is controlled to be ≥ 35%.

[0026] See Table 2 for the indicators of the re-election test.

[0027]

Embodiment 3

[0029] A certain bauxite, raw ore contains Al 2 o 3 61.71%, and the aluminum-silicon ratio (A / S) is 3.99.

[0030] The process system is as follows: the particle size of the grinding product is -0.074mm, accounting for about 88% to 92%, the pH of the flotation system is adjusted to pH 8.5 to 9.0 by using sodium carbonate, and flotation is carried out by adding dispersion inhibitors and combined collectors. The flotation process is 2 roughing, 1 sweeping and 3 fine, and adopts the technical scheme of step-by-step flotation, and the pulp concentration of roughing 1 is controlled to be ≥35%. The closed circuit test results are shown in Table 3.

[0031]

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Abstract

A gradient floatation method for bauxite includes such steps as grinding raw bauxite, adding chemicals, stirring, coarse floatation steps No.1 and No.2 while respectively controlling the concentration of sludge to 30% or more and 15-20%, and fine floatation steps No.1, No.2 and No.3.

Description

technical field [0001] The invention relates to a gradient flotation method for bauxite, in particular to a bauxite flotation method with a low aluminum-silicon ratio (3-5), and belongs to the technical field of mineral processing engineering. Background technique [0002] my country is rich in bauxite resources, according to statistics, there are 2.5 billion tons of resources. The bauxite ore in my country is mainly diaspore-kaolinite sedimentary bauxite ore, and the ore with low and medium aluminum-silicon ratio (4-8) accounts for more than 80%, while the ore with high aluminum-silicon ratio (A / S >10) ores accounted for only 6.94%. The key to successfully utilizing this resource is to increase the aluminum-silicon ratio of bauxite through ore dressing. In recent years, China has made breakthroughs in flotation desiliconization of bauxite. The existing technologies mainly include: [0003] a. A bauxite beneficiation method, publication number CN1080569A, publication dat...

Claims

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Application Information

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IPC IPC(8): B03D1/00B03D1/16
Inventor 胡岳华王毓华邓海波顾国华何平波覃文庆
Owner CENT SOUTH UNIV
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