Method for utilizing bauxite dust

A bauxite and dust technology, applied in the field of bauxite dust utilization, can solve problems affecting normal production, secondary flying, and aggravated grinding, so as to overcome the deterioration of the flotation operation environment, optimize the flotation index, and avoid Secondary Flying Effect

Active Publication Date: 2013-05-08
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

[0003] There are some deficiencies in the current treatment method: one is that the dust enters the follow-up production process together with the raw ore, which will cause secondary flying, forming a vicious circle; the other is that due to the fine particle size of the raw ore dust, its （50） 13.97μm, -0.074mm accounted for 94%. After entering the mill in the grinding and floating process with the raw ore, it will aggravate the muddy phenomenon of grinding and affect the normal production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Send the overflow slurry of the secondary classifier in the grinding and floating section with a concentration of 35% to the slurry tank of the grinding and floating process, and add 1,500g / ton of sodium carbonate, 70g / ton of sodium hexametaphosphate, and 1,000g / ton of collector , Stir and mix evenly and then send it to flotation operation. After one rough, two fine and sweeping (rough sweeping and fine sweeping) operations, the concentrate and tailings are obtained.

[0015] Mineral processing indicators: concentrate A / S7.73; tailings A / S1.55; AL 2 o 3 The recovery rate is 80.54%.

Embodiment 2

[0017] The bauxite dust collected by the bag filter is sent to the pulping tank, and the overflow water from the concentrate thickener is added as required, and the bauxite dust slurry with a concentration of 33% is obtained after stirring evenly. Then use a pump to send it into the slurry tank of the grinding and floating process, and add the slurry with a concentration of 35% from the overflow tank of the secondary classifier according to the ratio of 1:5 between the bauxite dust slurry and the overflow volume of the secondary classifier, and at the same time Add 1000g / ton raw ore of sodium carbonate, 50g / ton raw ore of sodium hexametaphosphate, 1000g / ton raw ore collector, stir and mix evenly and send it to flotation operation. fine sweeping) operations to obtain concentrated ore and tailings.

[0018] Mineral processing indicators: concentrate A / S7.93; tailings A / S1.48; AL 2 o 3 The recovery rate is 80.56%.

Embodiment 3

[0020] The bauxite dust collected by the bag filter is sent to the pulping tank, and the overflow water from the concentrate thickener is added as required, and the bauxite dust slurry with a concentration of 35% is obtained after stirring evenly. Then use a pump to send it into the slurry tank of the grinding and floating process, and add the slurry with a concentration of 35% from the overflow tank of the secondary classifier according to the ratio of 1:5 between the bauxite dust slurry and the overflow volume of the secondary classifier, and at the same time Add 3000g / ton raw ore of sodium carbonate, 70g / ton raw ore of sodium hexametaphosphate, 1100g / ton raw ore collector, stir and mix evenly and send it to flotation operation. fine sweeping) operations to obtain concentrated ore and tailings.

[0021] Mineral processing indicators: concentrate A / S7.82; tailings A / S1.52; AL 2 o 3 The recovery rate is 81.71%.

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Abstract

The invention relates to a method for utilizing bauxite dust produced during the aluminum oxide producing process by an ore dressing Bayer method, comprising the following steps of mixing the bauxite dust with the overflow water of a concentrate thickener to obtain the slurry with a certain concentration; after the slurry is mixed with the overflow of a second-grade grader in grinding process according to a certain rate, adding regulator, dispersant and collecting agent to the obtained slurry according to the requirements; and then obtaining the concentrate and tailings after the operations of coarsely scavenging for one time, finely scavenging for two times and scavenging (coarsely scavenging and finely scavenging). The method of the invention prevents the raw ore dust from secondarily flying, overcomes the argillization phenomenon of dramatically grinding the raw ore dust, optimizes the flotation work environment of the bauxite, and improves the selection index.

Description

technical field [0001] The invention relates to a method for utilizing bauxite dust, in particular to a method for utilizing bauxite dust in the production process of ore dressing Bayer process alumina. Background technique [0002] During the alumina production process of the beneficiation Bayer process, a certain amount of raw ore dust is generated when the bauxite raw ore is crushed and transported, and the raw ore dust accounts for about 1%-2% of the raw ore amount. At present, these raw ore dusts are collected by bag dust collectors, and then manually cleaned and placed in the raw ore storage yard, and enter the subsequent production process with the raw ore. [0003] There are some deficiencies in the current treatment method: one is that the dust enters the follow-up production process together with the raw ore, which will cause secondary flying, forming a vicious circle; the other is that due to the fine particle size of the raw ore dust, its （50） It is 13.97μm, and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/00
Inventor 李太昌刘伟张文豪武福运黄春城刘焦萍郑好民
Owner 中铝中州铝业有限公司
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