Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Treatment method of precipitation residues in cyanide barren solution

A technology of cyanide barren solution and treatment method, which is applied in the direction of zinc sulfide, improvement of process efficiency, photography process, etc., can solve the problems of lack of sedimentation residue treatment technology, failure to solve disadvantages, etc., and achieve the effect of high-efficiency separation and recovery

Active Publication Date: 2020-07-17
NORTHEASTERN UNIV
View PDF12 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the ensuing problem is the lack of reasonable and efficient sedimentation slag treatment technology, otherwise the cost of the barren liquid treatment technology is unbearable for gold companies, so this method has not yet been applied in industry
Invention patent CN109385538A uses zinc salt purification and carbonate transfer to realize zinc salt recycling, but in this process, zinc salt purification will deposit in the slag together with the copper-cyanide complex in the barren solution. When the salt is dissolved, although the zinc is separated, the copper-cyanide complex will re-enter the solution and return to the process, and the slag treatment uses the acidification method, which fails to solve the disadvantages caused by the acidification

Method used

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
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Treatment method of precipitation residues in cyanide barren solution
  • Treatment method of precipitation residues in cyanide barren solution
  • Treatment method of precipitation residues in cyanide barren solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The present embodiment provides a kind of processing method for the precipitation slag that is used for cyanide barren solution, comprises the steps:

[0039] (1) Put 100g of cyanide barren solution precipitation slag containing 21.9g of zinc element in the sodium sulfide solution of pH=10 according to the liquid-solid ratio of 2:1. After liquid separation, a new slag phase mainly composed of sphalerite (ZnS) can be obtained, and the new slag phase can be sold as a zinc concentrate product or directly used for zinc extraction, and then the Zn element in the precipitated slag of the cyanide barren solution is completed. recycling;

[0040] (2) After recovering the Zn element in step (1) with Cu(CN) 3 2- The ion solution is used as the electrolyte, and then the liquid is used as the electrolyte, and 150A / m is applied 2At a temperature of 60°C, the electrolyte is electrolyzed for 2 hours by electrolysis, the metal copper is directly recovered, and it is recycled by addi...

Embodiment 2

[0043] The present embodiment provides a kind of processing method for the precipitation slag that is used for cyanide barren solution, comprises the steps:

[0044] (1) Put 100g of cyanide barren solution precipitation slag containing 28.9g of zinc element in the sodium hydrosulfide solution of pH=9 according to the liquid-solid ratio of 3:1, and react at room temperature for 60min, and then pass through the reacted solution. After solid-liquid separation, a new slag phase mainly composed of sphalerite (ZnS) can be obtained, and the new slag phase can be sold as a zinc concentrate product or directly used for zinc extraction, and then the Zn in the precipitated slag of the cyanide barren solution is completed. recycling of elements;

[0045] (2) After recovering the Zn element in step (1) with Cu(CN) 3 2- The ion solution is used as the electrolyte, and then the liquid is used as the electrolyte, and 200A / m is applied 2 The cathodic current density, at a temperature of 50 ...

Embodiment 3

[0048] The present embodiment provides a kind of processing method for the precipitation slag that is used for cyanide barren solution, comprises the steps:

[0049] (1) Put 100g of cyanide barren solution precipitation slag containing 30.1g of zinc element in the hydrogen sulfide solution of pH=12 according to the liquid-solid ratio of 5:1. After liquid separation, a new slag phase mainly composed of sphalerite (ZnS) can be obtained, and the new slag phase can be sold as a zinc concentrate product or directly used for zinc extraction, and then the Zn element in the precipitated slag of the cyanide barren solution is completed. recycling;

[0050] (2) After recovering the Zn element in step (1) with Cu(CN) 3 2- The ion solution is used as the electrolyte, and then the liquid is used as the electrolyte, and 300A / m is applied 2 At a temperature of 40°C, the electrolyte is electrolyzed for 4 hours by electrolysis, the metal copper is directly recovered, and recycled by adding ...

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

PUM

No PUM Login to View More

Abstract

The invention discloses a treatment method of precipitation residues in a cyanide barren solution. The treatment method comprises the following steps that (1) the precipitation residues in the cyanidebarren solution are placed in an alkaline sulfide solution and react for 20-60min at the normal temperature to obtain new residues with ZnS as the main element to recover Zn from the precipitation residues in the cyanide barren solution; and (2) a solution containing Cu(Cn)32-ions obtained after Zn recovery is directly used as an electrolyte, and then metallic copper is recovered by electrolyzingthe electrolyte. According to the treatment method, environmental-friendly wet recovery of the precipitation residues in the cyanide barren solution is realized, the precipitation residues are directly converted by means of the sulfide solution to realize efficient separation and recovery of valuable elements Zn and Cu in the precipitation residues, and thus, complete harmlessness is realized.

Description

technical field [0001] The invention relates to the technical field of resource utilization of metallurgical slag, in particular to a treatment method for precipitation slag in cyanidation barren solution. [0002] technical background [0003] As the largest gold producing country, cyanide leaching of gold concentrate is the most common gold extraction method in China. Due to the highly toxic nature of cyanide, the barren solution containing cyanide produced after gold extraction by cyanide has become the top priority of environmental protection in the gold industry. [0004] In recent years, domestic environmental protection pressure has been increasing day by day. Out of cost considerations, most gold smelting enterprises have adopted the acidification method. After simply treating heavy metal elements such as Cu in the cyanide-containing barren liquid, the liquid is neutralized and returned to the leaching process to continue recycling; continuous closed circuit Recyclin...

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

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B19/20C22B19/30C25C1/12C25C7/06C01G9/08
CPCC01G9/08C22B7/006C22B19/20C22B19/30C25C1/12C25C7/06Y02P10/20
Inventor 李斌川韩庆李名新王晓歌刘奎仁陈建设吕久吉
Owner NORTHEASTERN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com