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Method for recovering low-grade precious metals from mineral dressing tailings

A precious metal, low-grade technology, applied in the field of beneficiation, can solve problems such as low recovery rate of precious metal gold, and achieve the effects of improving economic benefits, solving impacts, and improving comprehensive utilization rate

Active Publication Date: 2015-08-19
NORTHWEST RES INST OF MINING & METALLURGY INST
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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 provide a method for recovering low-grade precious metals from flotation tailings to solve the problem of low recovery rate of precious metal gold in the existing tailings beneficiation process

Method used

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  • Method for recovering low-grade precious metals from mineral dressing tailings

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Embodiment 1

[0023] The method of the present invention is used to recover low-grade precious metals from a certain flotation tailings in Jiangxi. The mass percentage content of sulfur in the tailings is 8.50%, and the mass ratio of precious metal gold to tailings is 0.20g / t.

[0024] Step 1, tailings raw material flotation, pulp the tailings raw material, the mass percentage concentration of the pulp is 25%, add copper sulfate and stir for 3 minutes after fully stirring, the mass ratio of copper sulfate and tailings raw material is 200g / t, in the slurry Then add isoamyl xanthate and terpineol oil and stir for 2 minutes. The mass ratio of isoamyl xanthate and tailings raw material is 200g / t, and the mass ratio of terpineol oil to tailings raw material is 50g / t; inflate the slurry Flotation, rough concentrate and tailings are obtained after one roughing and one sweeping, and the coarse concentrate is ground until the mass percentage of particles with a particle size of -0.074mm is 75%. ore ...

Embodiment 2

[0034] The method of the present invention is used to recover low-grade precious metals from a certain flotation tailings in Gansu. The mass percent content of sulfur in the tailings is 10.25%, and the content of precious metal gold is 0.45g / t.

[0035] Step 1, tailings raw material flotation, pulping the tailings raw material, the mass percentage concentration of the pulp is 30%, after fully stirring, add copper sulfate and stir for 3 minutes, the mass ratio of copper sulfate and tailings raw material is 200g / t, in the slurry Then add isoamyl xanthate and terpineol oil and stir for 2 minutes. The mass ratio of isoamyl xanthate and tailings raw material is 200g / t, and the mass ratio of terpineol oil to tailings raw material is 60g / t; inflate the slurry Flotation, rough concentrate and tailings are obtained through one roughing and one sweeping, and the coarse concentrate is ground until the mass percentage of particles with a particle size of -0.074mm is 80%. Mine and tailings...

Embodiment 3

[0045] The method of the present invention is used to recover low-grade precious metals from certain flotation tailings in Xinjiang. The mass percent content of sulfur in the tailings is 12.42%, and the content of precious metal gold is 0.78g / t.

[0046] Step 1, tailings raw material flotation, the tailings raw material is pulped, the mass percentage concentration of the pulp is 35%, after fully stirring, add copper sulfate and stir for 3 minutes, the mass ratio of copper sulfate and tailings raw material is 200g / t, in the slurry Then add isoamyl xanthate and terpineol oil and stir for 2 minutes. The mass ratio of isoamyl xanthate to tailings raw material is 250g / t, and the mass ratio of terpineol oil to tailings raw material is 60g / t; inflate the slurry Flotation, rough concentrate and tailings are obtained through one roughing and one sweeping, and the coarse concentrate is ground until the mass percentage of particles with a particle size of -0.074mm is 85%. Ore and tailing...

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Abstract

The invention relates to the technical field of mineral dressing and discloses a method for recovering low-grade precious metals from mineral dressing tailings. The method comprises a tailing raw material floating step, a Knelson concentrator gravity concentration step, a Knelson tailing oxidizing roasting pretreatment step, a cinder cyanide leaching step and the like; golds are is enriched in flotation concentrate by tailing flotation; coarse grained golds in the flotation concentrate are recycled by adopting a Knelson concentrator gravity concentration method; Knelson tailings are subjected to oxidizing roasting pretreatment; treated cinder is processed by adopting a cyanide leaching technique to recover fine-grained golds lost in the Knelson tailings. According to the method disclosed by the invention, the recovery of the golds is realized by stages, so that the recovery rate of the golds is improved; the problem that as the flotation tailings are treated by adopting a traditional technique, the recovery rate of the precious metals is low is solved, and the recovery rate of the precious metals is improved; meanwhile, gold concentrate and iron concentrate are produced, so that the comprehensive utilization rate of the tailing is improved; zero discharge of solid waste is realized, the influence of a tailing pond on the surrounding environment is thoroughly avoided, and a pollution source and potential safety hazards are eliminated.

Description

technical field [0001] The invention relates to the technical field of mineral processing, in particular to a method for recovering low-grade precious metals from mineral processing tailings which can improve the recovery rate of precious metals and realize the comprehensive utilization of secondary resources of tailings. Background technique [0002] The tailings of metallurgical enterprises in my country after beneficiation are stacked in the reservoir dam, which is likely to cause secondary disasters such as collapse and mudslides, and environmental and safety problems have become increasingly prominent. The utilization rate of tailings is low, resulting in a huge waste of resources. With the development of production technology and beneficiation technology, various elements, especially rare and precious metal elements, can be recovered from tailings. The recovery and comprehensive utilization of useful components in tailings can not only expand the amount of resources, ...

Claims

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Application Information

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IPC IPC(8): C22B3/04C22B1/00C22B11/08
CPCY02P10/20
Inventor 袁艳孙运礼王章鹤廖雪珍柏亚林王李鹏何海涛李福兰沈广坤彭贵熊
Owner NORTHWEST RES INST OF MINING & METALLURGY INST
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