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A beneficiation process for recovering fine-grained and fine-grained cassiterite from tailings

A technology of fine particles and tailings, which is applied in the direction of mechanical material recovery, recycling technology, solid separation, etc. Improve desliming effect, eliminate adverse effects, reduce gangue content

Active Publication Date: 2020-02-18
有研资源环境技术研究院(北京)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] When the fine-grained cassiterite in the tailings is recovered by the conventional beneficiation method, the effect is poor
The reason is that on the one hand, due to the lack of fine particle size control during desliming, the removal rate of fine mud is not high, and part of the cassiterite will be lost during desliming; The surface of cassiterite is highly hydrophilic, and a collector with strong collection capacity is needed to ensure sufficient recovery rate. However, since cassiterite is an oxidized ore, when cassiterite is collected, a large amount of cassiterite that can be floated will also be collected. Gangue with similar properties, resulting in low concentrate grade, low recovery rate, and low re-election efficiency of medium ore

Method used

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  • A beneficiation process for recovering fine-grained and fine-grained cassiterite from tailings
  • A beneficiation process for recovering fine-grained and fine-grained cassiterite from tailings
  • A beneficiation process for recovering fine-grained and fine-grained cassiterite from tailings

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Embodiment 1

[0036] In a gravity-selected tin-bearing tailings in Yunnan, the tin-containing minerals in the ore are mainly cassiterite, and the loss form of cassiterite mainly exists in the form of tin inclusions, with an average particle size of 15 μm and a monomer dissociation degree of 32.05%. Stone minerals are mainly mica, quartz and feldspar. The tailings contain 0.36% tin.

[0037] Utilize the method of the present invention, after this tailings slurry is passed through the screen, enter the superfine purification classifier of φ50mm, the concentration is 8% (weight ratio), and the slurry feeding pressure is 0.50MPa; The flow enters the φ10mm ultra-fine purification classifier, the slurry inlet pressure is 0.85MPa, the φ50mm ultra-fine purification classifier is sanded (+20μm) and then ultra-finely ground after concentration. The grinding fineness is -0.010mm 80%. The finished pulp is then returned to the φ50mm ultra-fine purification classifier to form a closed loop. The overflo...

Embodiment 2

[0042]In an old tin-bearing mine tailings in Guangxi, the tin-containing minerals in the ore are mainly cassiterite, and the loss form of cassiterite in the tailings is finely embedded inclusions, with an average embedded particle size of 18 μm. Gangue minerals are mainly sericite, quartz and kaolinite. The tailings contain 0.41% tin.

[0043] Utilize the method of the present invention, after this tailings slurry is passed through the screen, enter the ultrafine purification classifier of φ50mm, the concentration is 10% (weight ratio), and the slurry feeding pressure is 0.46MPa; The overflow of the ultrafine purification classifier of φ50mm The flow enters the φ10mm ultra-fine purification classifier, the slurry inlet pressure is 0.94MPa, and the φ50mm ultra-fine purification classifier is sanded (+20μm) and then ultra-finely ground after concentration. The grinding fineness is -0.010mm 86%. The finished pulp is then returned to the φ50mm ultra-fine purification classifier t...

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Abstract

The invention discloses a beneficiation process for recovering fine and micro-fine granular cassiterite from tailings. According to the beneficiation process, fine and micro-fine granular cassiteritein tailings is processed through an ultra-fine purification grading system-flotation combined procedure. The beneficiation process comprises the steps that after the tailings are mixed and pass through a mesh sieve, fine slime with the granularity of 5 [mu]m is removed firstly through two ultra-fine purification grading systems which have composite force fields and are connected in series; and settled sand from the first ultra-fine purification grading system is ground in an ultra-fine mode and then is returned to the first ultra-fine purification grading system, so that a closed cycle is formed. According to the beneficiation process, traditional gravity concentration equipment is replaced by the ultra-fine purification grading systems for desliming, so that ultra-fine slime with the granularity of 5 [mu]m can be remarkably removed, negative influences of most ultra-fine slime on beneficiation are eliminated, and a pre-concentration effect is achieved; and the desliming process is simplified, the desliming effect is improved. By adoption of the beneficiation process, the utilization rate of fine and micro-fine granular cassiterite from tailings can be increased, and thus, good economic benefits and social benefits are achieved.

Description

technical field [0001] The invention relates to a beneficiation process for recovering fine-grained and fine-grained cassiterite from tailings, and belongs to the technical field of ore-beneficiation. Background technique [0002] The embedded particle size of cassiterite minerals is directly related to the utilization rate of tin ore resources. Cassiterite with fine particle size is embedded because it is wrapped by other minerals. If the effective monomer dissociation of cassiterite minerals is to be realized, the ore needs to be finely ground, and because of its special physical properties such as brittleness and fragility, cassiterite is easily muddied or over-pulverized in the process of crushing ore and finely grinding, resulting in A large amount of secondary slime makes it difficult to recover fine-grained cassiterite. At present, about 30% of the annual loss of tin in tin mines in the world is lost in the form of fine mud. [0003] When recovering fine-grained ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03B9/06
CPCB03B9/06Y02W30/52
Inventor 陈勇宋永胜温建康李文娟
Owner 有研资源环境技术研究院(北京)有限公司
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