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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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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

A method for recovering copper, lead and zinc from ultra-fine complex cyanide tailings, which belongs to the field of mineral processing technology and includes the following steps: (1) Concentrate the ultra-fine complex cyanide tailings through a thickener, add water and sodium carbonate, and stir Make primary slurry; (2) Send the primary slurry to the flotation unit, and use one coarse, one fine and two sweep flotation processes to recover lead; the tailings obtained from the second sweep are lead sweep tailings; (3) lead After the scavenging tailings are concentrated, water is added to make a secondary slurry; the secondary slurry is sent to the flotation unit, and copper is recovered using a coarse, second fine, and two-sweep flotation process. The tailings obtained from the secondary scavenging are copper scavenged tailings. ; (4) Concentrate the copper sweep tailings and add water to make a tertiary slurry, and adjust the pH value; the zinc will be recovered using a crude, three fine, and two sweep flotation processes; the concentrate obtained from the tertiary beneficiation is a zinc concentrate. The method of the invention has simple process operation, stable production index, realizes the recycling and application of production tail water, and reduces environmental pollution.

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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