Thiosulfate gold extraction method taking alkyl trimethyl quaternary ammonium salt as additive

A technology of alkyl trimethyl quaternary ammonium salt and thiosulfate, applied in the field of hydrometallurgy

Inactive Publication Date: 2014-04-23
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved in the present invention is to only adopt the gold leaching solution containing copper ion, ethylenediamine, thiosulfate to process actual ore, especially some iron-containing, The problem of low gold leaching rate for gold ores with a high degree of muddying such as manganese

Method used

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  • Thiosulfate gold extraction method taking alkyl trimethyl quaternary ammonium salt as additive
  • Thiosulfate gold extraction method taking alkyl trimethyl quaternary ammonium salt as additive
  • Thiosulfate gold extraction method taking alkyl trimethyl quaternary ammonium salt as additive

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Experimental program
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Effect test

Embodiment 1

[0020] In this embodiment, a gold mine is used as the treatment object, and the gold mine contains 38.51% iron, 0.57% copper, and 2.17g / t gold.

[0021] The thiosulfate gold extraction method using alkyl trimethyl quaternary ammonium salt as additive described in this embodiment specifically includes the following steps, such as figure 1 Shown:

[0022] (1) After the ore is crushed, it is wet-milled until the ore fineness -200 mesh accounts for more than 90%, and the concentration of the ore pulp is controlled to 40% by adding an appropriate amount of water, and the pH is adjusted to 9 by sodium hydroxide strips;

[0023] (2) According to the water content, solid octadecyltrimethylammonium chloride is added to the pulp to make the concentration 0.1mol / L;

[0024] (3) According to the water content, add ethylenediamine and copper ions in sequence to the pulp obtained in step (2) to make the concentrations 0.003 mol / L and 0.0015 mol / L;

[0025] (4) In terms of water content, ...

Embodiment 2

[0028] Present embodiment is processing object with certain gold ore, and gold-containing 1.8g / t, copper 0.15%, iron 26.41% are contained in this gold ore.

[0029] The thiosulfate gold extraction method using alkyl trimethyl quaternary ammonium salt as additive described in this embodiment specifically includes the following steps, such as figure 1 Shown:

[0030] (1) After the ore is crushed, it is wet-milled until the ore fineness -200 mesh accounts for more than 90%, and the concentration of the ore slurry is controlled to 30% by adding an appropriate amount of water, and the pH is adjusted to 8 by sodium hydroxide strips;

[0031] (2) In terms of water content, add octaalkyltrimethylammonium bromide solution to the pulp to make it at a concentration of 0.01 mol / dm 3 ;

[0032] (3) According to the water content, add ethylenediamine and copper ions in sequence to the pulp obtained in step (2) to make the concentration 0.09 mol / dm 3 , 0.03 mol / dm 3 ;

[0033] (4) Add ...

Embodiment 3

[0036] In this embodiment, a gold mine is used as the treatment object, and the gold mine contains 2.20 g / t of gold, 13.07% of iron, 1.4% of copper, and 2.2% of manganese.

[0037] The thiosulfate gold extraction method using alkyl trimethyl quaternary ammonium salt as additive described in this embodiment specifically includes the following steps, such as figure 1 Shown:

[0038] (1) In terms of water content, the ore is crushed and wet-milled until the ore fineness -200 mesh accounts for more than 90%, and the concentration of the ore slurry is controlled to 40% by adding an appropriate amount of water, and the pH is adjusted to 10 by sodium hydroxide strips;

[0039] (2) According to the water content, solid tetradecyltrimethylammonium fluoride is added to the pulp to make the concentration 0.05 mol / dm 3 ;

[0040] (3) According to the water content, add ethylenediamine and copper ions in sequence to the slurry obtained in step (2) to make the concentration 0.03 mol / dm ...

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Abstract

The invention discloses a thiosulfate gold extraction method taking an alkyl trimethyl quaternary ammonium salt as an additive and belongs to the technical field of wet metallurgy. Aiming at the problems of a traditional thiosulfate leaching method adopted by some ores that the leaching efficiency is low and the consumption of reagents is great, ore pulp is modified and then is treated; after the ore pulp is modified by using the thiosulfate gold extraction method, thiosulfate, ethidene diamine and a copper ion gold leaching solution are used for leaching and the leaching rate is higher than 75%; the process is simple to operate and easy to control; the consumption amount of the thiosulfate is very low; components of the gold leaching solution are simple and gold in the gold leaching solution is easy to recycle; the applicable range is wide and the leaching effect is good under the condition that the pH (Potential of Hydrogen) is 9-12; the leaching speed of gold ores which are highly slimed by limonite is rapid and the relatively-high gold leaching rate can be kept; toxic substances including sodium cyanide and the like are not utilized in a gold extraction process and toxic wastes are not discharged; the thiosulfate gold extraction method is environment-friendly.

Description

technical field [0001] The invention relates to a thiosulfate gold extraction method using alkyl trimethyl quaternary ammonium salt as an additive, belonging to the field of hydrometallurgy. Background technique [0002] The cyanide used in conventional gold extraction technology is a highly toxic reagent. If it is not handled properly in the production process, it will cause fatal production accidents. If it is discharged with tailings and wastewater, it will endanger the ecological environment. [0003] Thiosulfate has always been considered as the gold extraction reagent most likely to replace cyanide and has attracted widespread attention. Since the 1980s, there have been many reports, and it has many advantages in the gold leaching process. First of all, the complex constant of thiosulfate and gold is very large, which can form a stable complex, making it possible to leaching gold with thiosulfate; secondly, the reagent price of thiosulfate is cheaper than cyanide, whic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/12C22B11/00
CPCY02P10/20
Inventor 字富庭余洪胡显智聂彦合钟晋何素琼陈蓉
Owner KUNMING UNIV OF SCI & TECH
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