Method for recovering copper, lead and zinc from ultra-fine complicated cyanidation tailings

A technology for cyanidation tailings and copper recovery, which is applied in solid separation, flotation and other directions, can solve the problems of complex operation, high loss, low lead-copper-zinc mineral quality and low recovery rate, and achieves simple operation and high quality in the process. , to achieve the effect of recycling

Active Publication Date: 2015-05-27
NORTHEASTERN UNIV
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  • Abstract
  • Description
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  • 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 re

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  • Method for recovering copper, lead and zinc from ultra-fine complicated cyanidation tailings
  • Method for recovering copper, lead and zinc from ultra-fine complicated cyanidation tailings
  • Method for recovering copper, lead and zinc from ultra-fine complicated cyanidation tailings

Examples

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Example Embodiment

[0020] Example 1

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

[0022] Table 1 Analysis of tailings composition of gold concentrate cyanide gold extraction operation

[0023] elementAu(g·t -1 ) Ag(g·t -1 ) Cu (%) Pb (%) Zn (%) Fe(%) content 2.75673.921.7022.352.4529.42

[0024] (1) Stirring and slurry mixing: The ultrafine and complex cyanide tailings produced by the gold concentrate cyanide gold extraction operation 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 slurry concentration. Stirring makes the pulp fully mineralized; the pulp mass concentration is 40%, the amount of sodium carbonate is 2kg / t, and the stirring time is 20min;

[0025] (2) Flotation recovery of lead: the pulp is sent to the flotation unit, an...

Example Embodiment

[0029] Example 2

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

[0031] Table 2 Analysis of tailings composition of gold concentrate cyanide gold extraction operation

[0032]

[0033] (1) Stirring and slurry mixing: The ultrafine and complex cyanide tailings produced by the gold concentrate cyanide gold extraction operation 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 slurry concentration , Stirring makes the pulp fully mineralized; the pulp mass concentration is 43%, the amount of sodium carbonate is 2kg / t, and the stirring time is 25min;

[0034] (2) Flotation recovery of lead: the pulp is sent to the flotation...

Example Embodiment

[0038] Example 3

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

[0040] Table 3 Analysis of the tailings composition of gold concentrate cyanide gold extraction operation

[0041]

[0042] (1) Stirring and slurry mixing: The ultrafine and complex cyanide tailings produced by the gold concentrate cyanide gold extraction operation 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 slurry concentration. Stirring makes the slurry fully mineralized; the slurry mass concentration is 45%; the amount of sodium carbonate is 2kg / t; the stirring time is 30min;

[0043] (2) Flotation recovery of lead: the pulp is sent to the flotat...

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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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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
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