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
CN103740930AInactive Publication Date: 2014-04-23KUNMING UNIV OF SCI & TECH
6 Cites 8 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
KUNMING UNIV OF SCI & TECH
Publication Date
2014-04-23
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

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.
Need to check novelty before this filing date? Find Prior Art

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More