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Flotation selection and desiliconization method for middle and low grade alumyte

A low-grade bauxite and bauxite technology, applied in flotation, solid separation and other directions, can solve the problems of low alumina recovery rate, large fluctuation of flotation operation, and difficult processing, and improve the alumina recovery rate , Reduce the difficulty of processing, and have significant economic benefits.

Active Publication Date: 2006-07-19
中铝中州铝业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the high chemical consumption, low alumina recovery rate, high difficulty in tailings and concentrate settlement and large fluctuations in flotation operation existing in the process of beneficiation and desiliconization of medium and low-grade bauxite in the prior art and other shortcomings, provide a flotation desiliconization method for low-grade bauxite with low chemical consumption, low water consumption, low energy consumption, and good desiliconization effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Raw material: Raw ore Al-Si ratio 5.63, Al 2 o 3 Content 63.03%, SiO 2 Content 11.19%.

[0019] Process: Classification-flotation process is adopted, and the grinding fineness is -0.074mm, which accounts for 75%. The spiral classifier is used for classification, and the sand returned by the classifier is used as coarse concentrate. The selected fineness is -0.074mm90%. The flotation process is one roughing, one scavenging, two beneficiation, one fine scavenging. The ore and the selected tailings are combined to form the total tailings.

[0020] Chemical system: mineral processing water is bauxite Bayer dissolution condensate, bauxite concentrate return water, and tailings return water, and the ratio is Bayer dissolution condensate: concentrate return water: tailings return water = 0.5:6:1.5. Sodium carbonate 1000g / ton, sodium hexametaphosphate 100g / ton, collector 300g / ton.

[0021] Beneficiation indicators: concentrate A / S 10.46, Al 2 o 3 The recovery rate was 88...

Embodiment 2

[0023] Raw materials: Raw ore Al-Si ratio 5.30, Al 2 o 3 Content 64.14%, SiO 3 Content 12.10%.

[0024] Process: All fine grinding and flotation processes are adopted. The grinding fineness is -0.074mm, which accounts for 93%, and the selected fineness is -0.074mm93%.

[0025] Chemical system: the water quality of beneficiation is bauxite Bayer dissolution condensate, bauxite concentrate return water, and tailings return water. The ratio is Bayer dissolution condensate: concentrate return water: tailings return water = 1.5: 4: 1.5, Sodium carbonate 1800g / ton, sodium hexametaphosphate 30g / ton, collector 1000g / ton.

[0026] Beneficiation indicators: concentrate A / S 11.10, Al 2 o 3 The recovery rate was 89.2%.

Embodiment 3

[0028] Raw materials: Henan bauxite sample 3 with a raw ore aluminum-silicon ratio of 6.0, Al 2 o 3 Content 63.39%, SiO 2 Content 11.0%.

[0029] Process: The flotation-classification flotation process is adopted, the grinding fineness is -0.074mm, which accounts for 75%, and the selected fineness is -0.074mm75%. The tailings are classified by the spiral classifier, the overflow of the classifier is used as tailings, and the sand returned by the classifier returns to the mill for regrinding. Chemical system: the water quality of beneficiation is bauxite Bayer dissolution condensate, bauxite concentrate return water, and tailings return. The ratio is Bayer dissolution condensate: concentrate return water: tailings return = 1:6:2.5, carbonic acid Sodium 3000g / ton, sodium hexametaphosphate 5g / ton, collector 800g / ton.

[0030] Beneficiation indicators: concentrate A / S 10.79, Al 2 o 3 The recovery rate was 88.9%.

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Abstract

The invention discloses a flotation desiliconisation method of low-grade bauxite with ore grinding, agent paste mixing and floating courses, which is characterized by the following: mixing bauxite Baeyer stripping condensed water and ore dressing backwater as the floatation water according to stripping condensed water: fine ore backwater: tailing backwater=0.5-1.5: 4-6: 1.5-2.5; adding modifying agent, disperser and collector to float the low-grade bauxite of 4-6 A / S ratio, wherein the soda quantity scale of modifying agent is 1000-3000 g / ton; the hexametaphosphate quantity scale of disperser is 5-100 g / ton; the quantity scale of collector is 300-1000 g / ton. The invention improves the sorting property between hydraulic aluminum and silicon vein mineral, which reduces the agent consumption.

Description

technical field [0001] The invention relates to beneficiation and desiliconization of middle and low grade bauxite, in particular to a method for beneficiation and desiliconization of diaspore type bauxite. Background technique [0002] The type of bauxite in my country is mainly diaspore bauxite, which has the characteristics of high aluminum, high silicon, and medium-low aluminum-silicon ratio. For diaspore-type bauxite, the technology of producing alumina by hybrid method and sintering method is mostly used in industry, which requires large investment, complicated process and high energy consumption. In recent years, in order to economically and rationally utilize my country's medium and low aluminum-silicon ratio bauxite resources, improving the grade of bauxite through ore dressing and desiliconization, and then using the economical Bayer process for alumina production has become an effective way to improve the utilization of bauxite resources. According to the developm...

Claims

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Application Information

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IPC IPC(8): B03D1/00B03D1/018B03D101/02B03D103/04
Inventor 刘焦萍刘伟黄昂黄春城薛玉兰汪明宏李太昌李华
Owner 中铝中州铝业有限公司
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