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A method for recovering copper, lead and zinc from ultrafine complex cyanide tailings

A technology for cyaniding tailings and recovering copper, which is applied in solid separation, flotation, etc., can solve the problems of high loss, low grade and recovery rate of lead, copper and zinc minerals, and complicated operation, so as to achieve high grade, realize recycling, The effect of simple process operation

Active Publication Date: 2017-03-29
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Cyanide tailings usually contain a large amount of slime, cyanide and excessive flotation reagents. The existing process for recovering lead, copper and zinc is complex and has high loss, and the recovered lead, copper and zinc minerals have low grade and recovery rate; In the context of the depletion of global mineral resources and the increasing environmental protection problems, how to effectively recover various valuable metal elements in the ultra-fine and complex cyanide tailings produced by ore gold extraction, so as to turn waste into treasure has become an important issue. The Common Research Direction of the World Mining Industry

Method used

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  • A method for recovering copper, lead and zinc from ultrafine complex cyanide tailings
  • A method for recovering copper, lead and zinc from ultrafine complex cyanide tailings
  • A method for recovering copper, lead and zinc from ultrafine complex cyanide tailings

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Experimental program
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Effect test

Embodiment 1

[0021] The tailings of the gold concentrate cyanidation gold extraction operation are shown in Table 1, and the particle size is -500 mesh, accounting for more than 90% of the total weight;

[0022] Table 1 Analysis of components of tailings in gold concentrate cyanidation gold extraction operation

[0023] element Au (g·t -1 )

Ag (g·t -1 )

Cu (%) Pb (%) Zn (%) Fe (%) content 2.75 673.92 1.70 22.35 2.45 29.42

[0024] (1) Stirring and pulping: The ultra-fine and complex cyanidation tailings produced by the cyanidation of gold concentrate are concentrated by a thickener, and the underflow obtained from the concentration is fed into the slurry mixing tank, and water and sodium carbonate are added to control the concentration of the slurry. Stir to fully mineralize the pulp; the mass concentration of the pulp is 40%, the dosage of sodium carbonate is 2kg / t, and the stirring time is 20min;

[0025] (2) Lead recovery by flotation: Send ...

Embodiment 2

[0030] The tailings of the gold concentrate cyanidation gold extraction operation are shown in Table 2, the particle size is -500 mesh accounts for more than 95% of the total weight, and the cyanide tailings with a particle size of <10 microns accounts for more than 30% of the total weight;

[0031] Table 2 Analysis of components of tailings in gold concentrate cyanidation gold extraction operation

[0032]

[0033] (1) Stirring and pulping: Concentrate the ultra-fine and complex cyanidation tailings produced by the cyanide gold extraction operation of gold concentrate through a thickener, and feed the underflow obtained from the concentration into the slurry mixing tank, add water and sodium carbonate to control the mass concentration of the pulp , stirring to fully mineralize the pulp; wherein the mass concentration of the pulp is 43%, the amount of sodium carbonate is 2kg / t, and the stirring time is 25min;

[0034] (2) Lead recovery by flotation: Send the ore slurry to t...

Embodiment 3

[0039] The tailings of gold concentrate cyanide gold extraction operation are shown in Table 3, the particle size is -500 mesh accounts for more than 95% of the total weight, and the cyanide tailings with a particle size of <10 microns accounts for more than 30% of the total weight;

[0040] Table 3 Analysis of components of tailings in gold concentrate cyanidation gold extraction operation

[0041]

[0042] (1) Stirring and pulping: The ultra-fine and complex cyanidation tailings produced by the cyanidation of gold concentrate are concentrated by a thickener, and the underflow obtained from the concentration is fed into the slurry mixing tank, and water and sodium carbonate are added to control the concentration of the slurry. Stir to fully mineralize the pulp; the mass concentration of the pulp is 45%; the amount of sodium carbonate is 2kg / t; the stirring time is 30min;

[0043] (2) Lead recovery by flotation: Send the ore slurry to the flotation unit, and recover lead by...

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Abstract

The invention provides a method for recovering copper, lead and zinc from ultra-fine complicated cyanidation tailings, and belongs to the technical field of mineral processing. The method comprises the following steps that (1) the ultra-fine complicated cyanidation tailings are concentrated through a thickener, and water and sodium carbonate are added and are stirred to be made into primary ore pulp; (2) the primary ore pulp is conveyed to a flotation machine unit, once-coarse once-fine twice-sweeping flotation flow process is adopted for recovering lead; the tailings obtained through secondary sweeping flotation are lead sweeping flotation tailings; (3) the lead sweeping flotation tailings are concentrated, then, water is added, and secondary ore pulp is prepared; the secondary ore pulp is conveyed to the flotation machine unit, once-coarse twice-fine and twice-sweeping flotation flow process is adopted for recovering copper, and the tailings obtained through secondary sweeping flotation are copper sweeping flotation tailings; (4) the copper sweeping tailings are concentrated, then, water is added, and tertiary ore pulp is obtained, and the pH value is regulated; once-coarse three-time-fine and twice-sweeping flotation flow process is adopted for recovering zinc; concentrates obtained through tertiary concentration are zinc concretes. The method provided by the invention has the advantages that the operation in the technical process is simple, the production index is stable, in addition, the recovery and the use of production tailing water are realized, and the environment pollution is reduced.

Description

technical field [0001] The invention belongs to the technical field of mineral processing, and in particular relates to a method for recovering copper, lead and zinc from ultrafine complex cyanide tailings. Background technique [0002] At present, gold production at home and abroad is mainly based on the low-cost and large-scale cyanide gold extraction method. The cyanide gold extraction method has the advantages of mature technology, low cost, strong ore adaptability, and high recovery rate. In the century-old gold extraction industry Occupying a dominant position, about 85% of the world's gold is currently produced by cyanide gold extraction. [0003] Due to the low content of gold in the raw ore, a large amount of ultra-fine complex cyanide tailings will be produced during the smelting process. The chemical composition of these cyanide tailings is relatively complex, containing various valuable metals such as lead, copper, zinc, etc. These Valuable metals have great uti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/00
Inventor 杨洪英刘子龙佟琳琳王德煜金哲男陈国宝张金龙刘瑞强范卿
Owner NORTHEASTERN UNIV LIAONING
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