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Ore dressing process for desiliconizing bauxite

A bauxite and desiliconization technology, applied in flotation, solid separation and other directions, can solve the problems of difficulty in removing clay sludge, interfering with the flotation process, and difficulty in obtaining washed concentrates with a high alumina-silicon ratio, so as to reduce chemical consumption. , Improve selectivity and ensure the effect of concentration

Inactive Publication Date: 2009-04-29
KUNMING ENG & RES INST OF NONFERROUS METALLURGY +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] For medium-low grade accumulation type or mixed type bauxite containing accumulation type, it is often difficult to obtain high-alumina-silicon ratio washing concentrates through ore washing treatment. If the conventional flotation process is used, the clay slime in accumulation Difficult to remove from the process in a timely manner, thereby interfering with the flotation process

Method used

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  • Ore dressing process for desiliconizing bauxite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Raw material: a mine sample from a certain mining area in Yunnan Bauxite Mine, its main chemical composition is (%)

[0022] Al 2 o 3 SiO 2 Fe 2 o 3 Al-Si Ratio 26.88 8.34 33.79 3.22

[0023] Agent: use one or more of oxidized paraffin wax soap, tall oil, fatty acid and its soaps and derivatives as collectors, use sodium carbonate, sodium hydroxide, metaphosphate, polyphosphate, water One or several of glass and small molecular organic matter are used as regulators for froth flotation.

[0024] Specific process flow:

[0025] A. Grind all the ores until the fineness reaches -0.074mm, accounting for 85%, and then enter the rough flotation. The rough flotation adopts the second flotation. Enter the fine flotation process;

[0026] B. Fine flotation adopts secondary selection. The flotation concentrate produced by the two selections is the final concentrate. The scavenging tailings and the tailings in step A are merged into the final t...

Embodiment 2

[0029] Raw material: a mine sample from a certain mining area in Yunnan Bauxite Mine, its main chemical composition is (%)

[0030] Al 2 o 3 SiO 2 Fe 2 o 3 Al-Si Ratio 46.36 18.53 16.65 2.50

[0031] Medicament: with embodiment 1.

[0032] Specific process flow:

[0033] A. Grind all the ores until the fineness reaches -0.074mm, accounting for 80%, and then enter the rough flotation. The rough flotation is one roughing and one sweeping. Selection, the rougher concentrate enters the fine flotation;

[0034] B. Fine flotation is three times of beneficiation. After three times of beneficiation, the output flotation concentrate is used as the final concentrate. After the tailings of the three fine flotation are combined, they are merged with the tailings of step A as the final tailings. .

[0035] Mineral dressing and desiliconization results: concentrate yield 39.79%, aluminum-silicon ratio 11.04, Al 2 o 3 The recovery rate is 52.30%.

Embodiment 3

[0037] Raw material: with embodiment 1.

[0038] Medicament: with embodiment 1.

[0039] Specific process flow:

[0040] A. Grind all the ore until the fineness reaches -0.074mm, accounting for 80%, and then enter the rough flotation. The rough flotation is two roughing and one sweeping. selection, the two roughing concentrates are merged into the beneficiation process;

[0041] B. The beneficiation is twice beneficiation. After two beneficiations, the flotation concentrate is produced as the final concentrate. After the two beneficiation tailings are merged, they are merged with the tailings of step A as the final tailings. .

[0042] Desiliconization results of beneficiation: concentrate yield 61.05%, aluminum-silicon ratio 9.47, Al 2 o 3 The recovery rate is 66.30%.

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Abstract

The invention provides a beneficiation and desiliconizing method of bauxite, comprising the following steps: firstly, coarse ore grains are milled and subjected to the flotation process, thus causing siliceous mineral to be disintegrated and removed; and secondly, tailing is removed in the cyclic processes of both rough scavenging and concentration, thus being capable of removing siliceous slurry in flow process in time, solving the problem that the slurry severely interferes the flotation process, caused by that accumulation type bauxite can not be removed in common flotation process due to large silt content, ensuring the concentration needed by flotation work, reducing the medicine consumption caused by the slurry absorbing medicine as the slurry can not be removed in time and improving the silicon aluminum separation selectivity. For ores with different silicon aluminum ratios, namely, crude ore silicon aluminum ratio between 2.5 and 8.6, the concentrate silicon aluminum ratio and the Al2O3 recovery rate index are both higher than washed ore desiliconizing index. The obtained concentrate product can be used for producing alumina.

Description

technical field [0001] The invention relates to an ore dressing and desiliconization method for stacked bauxite and mixed bauxite containing stacked bauxite, and belongs to the technical field of mineral dressing. Background technique [0002] Accumulative bauxite is mainly distributed in southern my country and other places. The accumulation-type bauxite ore-bearing layer is composed of clay and bauxite debris, and the particle size distribution of the debris is wide, and the maximum particle size can reach more than several meters. The Al-Si ratio in bauxite changes with the mineral particle size: the finer the particle size, the lower the Al-Si ratio, and often only the Al-Si ratio of +1mm grain size or coarser grain size can meet the production requirements of alumina, so There is a saying that "more than 1mm is ore, and less than 1mm is mud". Therefore, ore washing and desliming, and ore sand as the raw material for the production of alumina by the Bayer process are t...

Claims

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Application Information

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IPC IPC(8): B03D1/00B03D1/004B03B1/00B03B1/04B03D101/02B03D103/04
Inventor 邓传宏冯其明卢毅屏谢明跃欧乐明张国范
Owner KUNMING ENG & RES INST OF NONFERROUS METALLURGY
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