Selective leaching agent and deep separation method of complex copper-zinc mineral resources

A separation method and technology of mineral resources, applied in the fields of mineral processing, efficient utilization of resources, and hydrometallurgy, can solve the problems of complex procedures, restricting large-scale industrial applications, and rising production costs, achieving low economic costs and comprehensive recycling. High rate and low cost effect

Inactive Publication Date: 2021-01-05
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conventional combined dressing and metallurgy processes include roasting desulfurization-acid leaching process, pressure leaching process, chlorination roasting and leaching, etc. Combined dressing and metallurgy can extract the valuable metals in the copper-zinc mixed concentrate obtained by flotation into the solution, but The leaching solution still needs to be further separated from copper and zinc, and the process is complicated. In addition, methods such as roasting and pressurization greatly increase the production cost, which limits its large-scale industrial application.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The copper-zinc mixed ore is selected from minerals mainly containing copper sulfide ore, zinc sulfide ore and zinc oxide ore, typical but not limited to chalcopyrite and sphalerite, chalcopyrite and sphalerite, etc., and the copper grade is ≥ 0.2%, zinc grade ≥ 1.1%. The copper-zinc mixed ore is crushed-screened-grinded, and screened to -200 mesh, accounting for ≥40%. In this embodiment, the copper grade in the copper-zinc mixed ore is 2.35%, and the zinc grade is 3.42%. The copper-zinc mixed ore and selective leaching agent are mixed and adjusted to a pulp concentration of 10%, which is convenient for selective leaching. The preparation method of the selective leaching agent in this embodiment is to inject the Class A agent into the container of preset water, and after constant volume, ultrasonically obtain a uniform solution with a concentration of 300-340 g / L for 20 minutes, and set aside; weigh 4g / L L of silicone oil (type B agent) and 8g / L sodium lauryl sulfate ...

Embodiment 2

[0038] The copper-zinc mixed ore was obtained as in Example 1. The copper grade in the copper-zinc mixed ore concentrate of this embodiment was 1.85%, and the zinc grade was 2.42%. The copper-zinc mixed ore is mixed with selective leaching agent to adjust slurry to 25% pulp concentration. The preparation method of the selective leaching agent in this embodiment is to inject the Class A agent into the container of preset water, and after constant volume, ultrasonically obtain a uniform solution with a concentration of 400-450g / L for 20 minutes, and set aside; weigh 6 g / L L of silicone oil (type B agent) and 10 g / L sodium lauryl sulfate (type C agent) were injected into a three-necked flask with pre-distilled water, and a condensing device was installed above the flask, heated to reflux for 3 hours, and observed After the silicone oil and sodium lauryl sulfate are completely dissolved, cool down to room temperature; then slowly inject the completely dissolved solution into the a...

Embodiment 3

[0040] The copper-zinc mixed ore was obtained as in Example 1. The copper grade in the copper-zinc mixed ore of the present embodiment was 2.35%, and the zinc grade was 3.42%. The copper-zinc mixed ore is mixed with selective leaching agent to adjust slurry to 20% pulp concentration. The preparation method of the selective leaching agent in this embodiment is to inject the Class A agent into a container of preset water, and after constant volume, ultrasonically obtain a uniform solution with a concentration of 400-450g / L for 20 minutes, and set aside; weigh 5 g / L L of silicone oil (type B agent) and 6 g / LTween 60 (type C agent) were injected into a three-necked flask pre-prepared with distilled water, and a condensation device was installed above the flask, and heated to reflux for 3 hours. It was observed that the silicone oil and Tween60 were completely After dissolving, cool to room temperature; then slowly inject the completely dissolved solution into the above-mentioned s...

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Abstract

The invention relates to the field of mineral processing and hydrometallurgy, and particularly relates to a selective leaching agent and a deep separation method of complex copper-zinc mineral resources. The separation method comprises the steps that copper-zinc mixed ore is subjected to crushing, screening and ore grinding, and copper-zinc ore powder with the proper particle size is obtained; zinc in the copper-zinc mixed ore is leached out of the copper-zinc ore powder in the selective leaching agent, meanwhile, copper and iron are extremely dissolved in the leaching process, and low-zinc high-grade copper concentrate and zinc-containing leachate can be obtained after solid-liquid separation; and the zinc-containing leachate is subjected to sulfide precipitation, and high-grade sphalerite can be obtained after solid-liquid separation. The deep separation method of the copper-zinc ore is low in requirement for raw ore, the ore source is wide, for example, flotation of bulk concentrate, natural copper-zinc mixed ore, copper-zinc mixed ore obtained through enrichment in other manners and the like, the requirement for the ore grade is not strict, low-grade mineral resources can be processed, and the resource utilization rate is increased.

Description

technical field [0001] The invention relates to the fields of efficient utilization of resources, mineral processing and hydrometallurgy, in particular to a selective leaching agent and a method for deep separation of complex copper-zinc mineral resources using the selective leaching agent. Background technique [0002] In recent years, my country's demand for metal copper and zinc has continued to increase, but my country's copper and zinc mineral resources are characterized by poverty, fineness and miscellaneous. With the high-grade ore deposits being exploited in large quantities, the comprehensive utilization of complex copper-zinc mineral resources has become an urgent issue. In the process of mineral processing, the deep separation of copper and zinc has always been a difficult problem in the field. Common copper and zinc ores in nature are mainly copper sulfide ore and zinc sulfide ore. In all kinds of deposits, copper sulfide ore and zinc sulfide ore coexist freque...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B15/00C22B19/20C25C1/16C22B3/04
CPCC22B3/045C22B15/0065C22B19/20C25C1/16Y02P10/20
Inventor 赵红波孟晓宇张博
Owner CENT SOUTH UNIV
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