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Method for recovering tin by centrifugal concentration

A centrifugal concentrator and concentrator technology, applied in chemical instruments and methods, solid separation, wet separation, etc., can solve the problems of large investment and land occupation, difficulty in effective recovery, low tin recovery rate, etc., to achieve load reduction, Less environmental pollution and improved beneficiation efficiency

Inactive Publication Date: 2011-09-07
KUNMING METALLURGY INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And when it exists as an associated metal, over-grinding often occurs, and it is difficult to effectively recover it by general beneficiation methods
[0004] The current recycling of tin is mainly determined by its element content and ore properties. Single gravity separation, magnetic separation-gravity separation, gravity separation-flotation or a combination of several processes are often used to recover tin resources; these Tin recovery technology has the disadvantages of low tin recovery rate, large investment and large area occupation

Method used

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  • Method for recovering tin by centrifugal concentration

Examples

Experimental program
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Effect test

Embodiment 1

[0030] The ore processed by a concentrator is copper, zinc and tin-containing polymetallic associated ore. After the ore is crushed, ore-ground, and flotation to extract copper and zinc, the tailings enter the tin beneficiation operation. The processing capacity of tin selection operation is 100t / h (continuous flow), tin SnO 2 The grade is 0.4%, and the concentration is 16.8%.

[0031] The tin ore is recovered by adopting the method of recovering tin shown in the accompanying drawing, and the pulp is first transported to a cyclone for dehydration treatment, so that the water content of the pulp is 20-35%; the dehydrated pulp is further subjected to ball milling to control the The ore fineness is -200 mesh, accounting for 80%. The pulp after ball milling is introduced into a high-speed centrifuge for gravity beneficiation. The high-speed centrifuge uses a Falcon centrifugal concentrator with a gravity field of 140G. One-time sweeping process, roughing and sweeping concentrates...

Embodiment 2

[0034] The processing capacity of a tin ore dressing plant is 150t / h (continuous flow): tin SnO 2 The grade is 0.8-1.0%, and the concentration is 20%.

[0035] The tin ore is recovered by using the tin recovery method shown in the accompanying drawing. Since the tin ore has a water content of 20% after crushing, grinding and grading, no further concentration and dehydration is needed, and other indicators such as particle size can reach the centrifuge Gravity separation requirements, the tin ore slurry is directly introduced into the centrifuge for gravity beneficiation. The centrifugal beneficiation machine adopts a Nelson centrifugal concentrator with a gravity field of 180G. The tailings after gravity separation are directly discharged to the tailings pond; the coarse concentrate obtained by centrifugal gravity separation has a relatively large particle size. In order to improve the efficiency of shaker separation, the coarse concentrate is subjected to grinding treatment t...

Embodiment 3

[0038] A tin-bearing mineral processing plant processes tin-containing old tailings. The processing capacity of the processing plant is 50t / h (continuous flow). The tailings contain 0.19% tin grade, coarse particle size, and conjoined organisms account for the majority.

[0039] The method of recovering tin shown in the attached figure is used to re-select the old tailings of tin-containing ore dressing, and the tailings are transported from the tailings pond to the ore processing plant, and firstly undergo ball milling treatment to control the grinding fineness to -200 mesh. 80%, the tailings after ball milling are introduced into the centrifuge for gravity beneficiation. The final tailings are directly discharged to the tailings dam, and the coarse concentrate enters the classification shaking table for selection. The classification adopts the sequential combination of hydrocyclone and fine screen, and the coarse concentrate is divided into 200 mesh and 100 mesh as the classi...

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Abstract

The invention discloses a method for recovering tin by centrifugal concentration, belonging to the technical field of metal ore concentration. The method comprises the following steps of: recovering and enriching a tin resource from a tin-containing ore by using a high-speed centrifugal concentrator together with a shaking table; performing pretreatment or not performing treatment according to the milling characteristic of a tin ore; entering the high-speed centrifugal concentrator for rough gravity concentration; enriching to obtain a tin rough ore concentrate; removing tailings; and selecting the tin rough ore concentrate by using the shaking table to obtain a tin ore concentrate. The method has the advantages of high process specificity, high resource efficiency, remarkable economic benefit, small investment, small floor area and the like.

Description

technical field [0001] The invention relates to the technical field of metal ore beneficiation, in particular to a method for recovering tin by centrifugal beneficiation. Background technique [0002] With the rapid development of the economy, the consumption of resources is increasing, which intensifies the tension in the supply of mineral resources. While the mineral resources are being developed rapidly, a large amount of tin is discharged with the beneficiation tailings, which not only brings huge risks to the environment but also More importantly, it causes a great waste of resources. Tin resources are a scarce resource, and countries all over the world attach importance to and protect tin resources as an important strategic resource. [0003] Therefore, the maximum utilization and economic recovery of tin resources is the general trend. Some tin resources exist alone, while some tin resources exist as associated metals, and the tin grade is generally 0.2-1.0%. And wh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B7/00
Inventor 李晓阳白荣林梁溢强张杰简胜张旭东朱从杰王少东郭宇洪家薇杨玉珠乔吉波宋涛李云昆付丹阚赛琼
Owner KUNMING METALLURGY INST
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