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Physical ore dressing removal method for heavy metals in copper tailing

A technology of heavy metal and copper tailings, which is applied in the field of mine ecological environment and tailings resource reuse, can solve the problems of high energy consumption, high cost, heavy metal hazards, etc., and achieve the effect of improving economic benefits and low cost

Active Publication Date: 2019-01-11
INST OF MULTIPURPOSE UTILIZATION OF MINERAL RESOURCES CHINESE ACAD OF GEOLOGICAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantage of this method is that the removal rate of heavy metals is high, and it can provide standard raw materials for the application of molybdenum tailings in agriculture and ecology. The flue gas of various heavy metals needs to be handled properly, otherwise it will cause secondary pollution, and the heavy metals will be more harmful when they enter the atmosphere

Method used

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  • Physical ore dressing removal method for heavy metals in copper tailing
  • Physical ore dressing removal method for heavy metals in copper tailing
  • Physical ore dressing removal method for heavy metals in copper tailing

Examples

Experimental program
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Effect test

Embodiment 1

[0032] The raw material is the tailings newly discharged from a large-scale porphyry copper ore dressing plant in China, of which: the copper tailings contain 0.040% copper, 0.29% sulfur, 0.012% cobalt, 7.66% iron, arsenic, Cadmium, lead, chromium, mercury content are respectively 0.0073%, 0.0017%, 0.024%, 0.0685%, 0.00054%, utilize technology of the present invention, carry out following steps, as figure 1 :

[0033] A. Grinding step: Put the copper ore tailings into the ball mill for closed-circuit grinding operation, and grind to -0.074mm content of 76.8%;

[0034]B. Mixed flotation step of sulfide ore: Add the ground copper tailings to the flotation equipment, add soda ash to adjust the pH value of the slurry to 8-9, use butyl xanthate and Z-200 as collectors, and terpineol oil As a foaming agent, a closed-circuit flotation operation of roughing once, twice sweeping, and five times of beneficiation is carried out, and an appropriate amount of water glass is added as a dis...

Embodiment 2

[0042] Copper beneficiation tailings from a large-scale porphyry-type copper mine tailings pond in China are used as raw materials, of which: copper tailings contain 0.092% copper, 0.48% sulfur, 0.0077% cobalt, 8.31% iron, arsenic, cadmium, lead, Chromium, mercury content are respectively 0.0079%, 0.0018%, 0.026%, 0.0680%, 0.00061%, utilize technology of the present invention, carry out following steps, as figure 1 :

[0043] A. Grinding step: put the copper ore tailings into the ball mill for closed-circuit grinding operation, and grind to -0.074mm content of 71.5%;

[0044] B. Mixed flotation step of sulfide ore: Add the ground copper tailings to the flotation equipment, add soda ash to adjust the pH value of the slurry to 8-9, use butyl xanthate and Z-200 as collectors, and terpineol oil As a foaming agent, a closed-circuit flotation operation of roughing once, twice sweeping, and three times of beneficiation is carried out, and an appropriate amount of water glass is adde...

Embodiment 3

[0052] As another preferred embodiment of the present application, refer to the attached figure 1 , this example discloses:

[0053] A material dressing and removal method for heavy metals in copper tailings, comprising the following steps:

[0054] A. Grinding step: add copper ore tailings into the grinding equipment for closed-circuit grinding operation, and grind to -0.074mm content of 65%;

[0055] B. Mixed flotation step of sulfide ore: add the copper tailings ground in the above grinding step to the flotation equipment, add soda ash to adjust the pH value of the pulp to 8-9, and use butyl xanthate and Z-200 as the collection agent, pine oil as a foaming agent, a closed-circuit flotation operation of roughing, two sweeps, and four beneficiations; water glass is added as a dispersant in the beneficiation operation to obtain copper-sulfur mixed concentrate and flotation Dressing tailings: butyl xanthate roughing 50g / ton, 5g / ton each for the first and second sweeping, Z-20...

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Abstract

The invention discloses a physical ore dressing removal method for heavy metals in copper tailing, and relates to the field of the mine ecological environment and tailing resource reuse. The physicalore dressing technology of flotation-magnetic separation-gravity separation is adopted in the method, and the method comprises the steps of ore grinding, mixed flotation of sulphide ore, copper sulfurseparation flotation, low intensity magnetic separation, high intensity magnetic separation, gravity separation and the like. All kinds of heavy metals in the copper tailing can be effectively removed. Secondary resources are comprehensively recycled to produce copper concentrate with copper grade greater than 13%, cobalt sulphide concentrate with cobalt content greater than 0.35% and sulphur greater than 48%, and iron ore concentrate with iron grade greater than 60%. The weak magnetic and strong magnetic separation concentrate containing mass mica minerals can be used as a raw material for separation and recovery of mica. The method is simple and easy to conduct. The cost is low. Secondary pollution is avoided. In the process of innocuous treatment of the copper tailing, the secondary resources of the copper tailing can be recycled and utilized in a reasonable and comprehensive mode meanwhile. Economic benefits of mine enterprise disposal and utilization of the tailing can be improved.

Description

technical field [0001] The invention belongs to the fields of mine ecological environment and tailings resource utilization, and more specifically relates to a method for physically beneficiating and removing heavy metals in copper tailings. Background technique [0002] With the continuous development of my country's national economy and the massive development of mineral resources, a huge amount of mine solid waste—tailings are also produced. Because metal tailings often contain toxic and harmful substances such as arsenic, cadmium, lead, chromium, and mercury, etc. The heavy metals in the tailings are easy to pollute the surrounding soil, water and air to varying degrees during the stockpiling process. Research on effective removal methods of heavy metals in tailings, and recycling useful components in tailings as secondary resources can not only effectively alleviate resource shortages, improve resource utilization efficiency, but also reduce tailings stockpiles and light...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B9/06
CPCB03B9/06Y02W30/52Y02W30/60
Inventor 杨进忠周家云毛益林陈晓青刘小府王秀芬
Owner INST OF MULTIPURPOSE UTILIZATION OF MINERAL RESOURCES CHINESE ACAD OF GEOLOGICAL SCI
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