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Flotation method for removing potassium from potassium-containing bauxite

A bauxite and potassium removal technology, applied in flotation, solid separation and other directions, can solve the problems of difficult industrial application and complex process, and achieve the effect of improving output and quality, and achieving significant economic and environmental benefits.

Active Publication Date: 2020-11-13
GUIZHOU BRANCH CHINA ALUMINUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can realize the recovery of potassium carbonate product, but the process is relatively complicated, it is difficult to carry out industrial application, and does not solve K + Hazards to Aluminum Industry Production

Method used

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  • Flotation method for removing potassium from potassium-containing bauxite
  • Flotation method for removing potassium from potassium-containing bauxite
  • Flotation method for removing potassium from potassium-containing bauxite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0103] Embodiment 1: the flotation method of potassium-containing bauxite depotassium described in the present invention

[0104] A potassium-containing bauxite mine in Guizhou, in which the raw ore K 2 O content is 1.96%, Al 2 o 3 Content is 58.35%, SiO 2 The content is 14.12%, and the A / S is 4.13.

[0105] The flotation method of potassium-containing bauxite depotassium described in the present invention comprises the following steps:

[0106] (1) Grinding the potassium-containing bauxite to a fineness of -0.074mm accounts for 92.36% of the total mass;

[0107] (2) adjust the pH value of the slurry of the potassium-containing bauxite obtained in step (1), and then use a positive flotation depotassium collector to carry out positive flotation depotassiation to obtain a yield of 71.95%, and the A / S is 6.8 、K 2 Foam product with an O content of 0.95%, as depotassium aluminum concentrate, where K 2 O removal rate was 65.12%, the results are shown in Table 1;

[0108] W...

Embodiment 2

[0113] Embodiment 2: the flotation method of potassium-containing bauxite depotassium described in the present invention

[0114] A potassium-containing bauxite mine in Guizhou, where K 2 O content is 2.28%, Al 2 o 3 Content is 58.64%, SiO 2 The content is 12.16%, and the A / S is 4.82;

[0115] The flotation method of potassium-containing bauxite depotassium described in the present invention comprises the following steps, can refer to figure 1 :

[0116] (1) Grinding the potassium-containing bauxite to a fineness of -0.074mm accounts for 90.92% of the total mass;

[0117] (2) The pH value of the slurry of the potassium-containing bauxite obtained in step (1) is adjusted to 9.5, and the positive flotation depotassium collector is used to carry out positive flotation depotassium after 1 roughing, 3 refinements Election, 1 time of sweeping, positive flotation underflow was obtained, and the yield was 77.58%, A / S was 8.15, K 2 Foam product with an O content of 0.98%, as d...

Embodiment 3

[0127] Embodiment 3: the flotation method of potassium-containing bauxite depotassium described in the present invention

[0128] A potassium-containing bauxite mine in Henan, raw ore K 2 O content is 1.62%, Al 2 o 3 Content is 56.52%, SiO 2 The content is 14.08%, and the A / S is 4.01.

[0129] The flotation method of potassium-containing bauxite depotassium described in the present invention comprises the following steps:

[0130](1) Grinding the potassium-containing bauxite to a fineness of -0.074mm accounts for 85% of the total mass;

[0131] (2) Adjust the pH value of the slurry of the potassium-containing bauxite obtained in step (1) to 9.0, and then use a positive flotation depotassium collector to carry out positive flotation depotassiation. election, 3 sweeps, the yield was 72.66%, A / S was 6.84, K 2 O content is the foam product of 0.77%, and the results are shown in Table 3;

[0132] Wherein, the positive flotation depotassiation collector comprises sodium ole...

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Abstract

The invention discloses a flotation method for removing potassium from potassium-containing bauxite. The flotation method comprises the following steps: (1) grinding the potassium-containing bauxite until the potassium-containing bauxite with the fineness of-0.074 mm accounts for 85-95% of the total mass; (2) performing direct flotation on the potassium-containing bauxite obtained in the step (1)to remove potassium; (3) carrying out reverse flotation potassium removal on the direct flotation underflow obtained by the direct flotation potassium removal in the step (2); in the direct flotationpotassium removal process, the adopted direct flotation potassium removal collecting agent is selected from one or more than two of sodium oleate, benzohydroxamic acid or oxidized paraffin soap; in the reverse flotation potassium removal process, the adopted reverse flotation potassium removal collecting agent is selected from one or more than two of dodecyl trimethyl ammonium chloride, dodecyl dimethyl benzyl ammonium chloride or hexadecyl trimethyl ammonium bromide; in the reverse flotation potassium removal process, a reverse flotation inhibitor is adopted, and the reverse flotation inhibitor is selected from starch and / or dextrin. According to the flotation method for removing potassium from potassium-containing bauxite, the potassium oxide removal rate is remarkably increased.

Description

technical field [0001] The invention belongs to the technical field of bauxite flotation, and in particular relates to a flotation method for removing potassium from potassium-containing bauxite. Background technique [0002] K in some bauxite mines in Guizhou, Henan and Shanxi provinces 2 O content usually exceeds 1%, and potassium ore in bauxite mainly exists in silicate gangue minerals. [0003] During the production of alumina by the Bayer process, the presence of illite and other potassium-containing silicate minerals causes the continuous circulation and accumulation of potassium ions in the sodium aluminate solution, which easily leads to the refinement of seed crystal particles during the decomposition process, the reduction of decomposition rate, and the breakdown of alumina. Increased potassium content in products and other issues. In the production process of using potassium-containing bauxite tissue, K in alumina products 2 The O content will increase to about...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/00B03D1/02B03D1/008B03D1/01B03D1/016B03D101/02B03D101/06B03D103/02
CPCB03D1/00B03D1/02B03D1/008B03D1/01B03D1/016B03D2201/02B03D2203/02B03D2201/06
Inventor 马俊伟张建强吴国亮郭鑫张站云姚杰刘中原苏欢欢
Owner GUIZHOU BRANCH CHINA ALUMINUM IND
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