Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Gold Extraction Technology of Carbonaceous Refractory Gold Concentrate Microwave Biological Pre-oxidation

A technology for refractory gold and gold concentrates, applied in the direction of improving process efficiency, etc., can solve the problems of limited degradation and ineffective leaching of gold, and achieve the effect of improving the leaching rate

Active Publication Date: 2021-03-09
有研资源环境技术研究院(北京)有限公司
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for carbonaceous refractory gold ores containing organic carbon, the existing biological pre-oxidation system has limited degradation of organic carbon. Due to the existence of "gold-robbing carbon" in the cyanidation leaching process, part of the gold often cannot be effectively decomposed. leaching

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
  • Gold Extraction Technology of Carbonaceous Refractory Gold Concentrate Microwave Biological Pre-oxidation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A carbonaceous refractory gold concentrate in Guizhou contains Au 16.78g / t, S 35.85%, As 1.47%, total carbon 2.42%, organic carbon 2.08%, gold leaching rate of direct cyanide carbon leaching of gold concentrate is 10.24%, After biological preoxidation, the leaching rate of cyanide carbon leaching gold was 80.18%. This refractory gold concentrate is processed as follows by utilizing the technique of the present invention:

[0032] (1) Gold concentrate grinding

[0033] A carbonaceous refractory gold concentrate in Guizhou was ground to make regrind gold concentrate with a grinding particle size of -0.037mm90%.

[0034] (2) Microwave pretreatment of gold concentrate

[0035] The reground gold concentrate was mixed with 12% CaO, and treated at 1KW, 600°C for 15 minutes, and the degradation rate of organic carbon was 73.25%.

[0036] (3) Biological pre-oxidation of gold concentrate

[0037] After microwave treatment, the gold concentrate was adjusted to a concentration ...

Embodiment 2

[0045]A carbonaceous refractory gold concentrate in Guizhou, containing 28.40g / t of Au, 21.36% of S, 1.93% of As, 3.18% of total carbon, 1.85% of organic carbon, and the direct cyanidation carbon leaching gold leaching rate of gold concentrate is 1.22% , the leaching rate of cyanide carbon leaching gold after biological pre-oxidation was 81.09%. This refractory gold concentrate is processed as follows by utilizing the technique of the present invention:

[0046] (1) Gold concentrate grinding

[0047] Grind a carbonaceous refractory gold concentrate in Guizhou to -0.037mm 95%.

[0048] (2) Microwave pretreatment of gold concentrate

[0049] The carbonaceous refractory gold concentrate after grinding was mixed with 15% NaOH, and treated at 1KW, 600°C for 20min, and the organic carbon degradation rate was 82.15%.

[0050] (3) Biological pre-oxidation of gold concentrate

[0051] After microwave treatment, the gold concentrate was adjusted to a concentration of 15%, and 15% (v...

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 relates to a microwave biological pre-oxidation gold extraction process of carbonaceous refractory gold concentrate, which belongs to the technical field of gold smelting. The technical method first uses microwaves to degrade organic carbon in carbonaceous refractory gold ores, oxidizes part of the wrapped sulfides, and then uses biological pre-oxidation to open the remaining gold-wrapped sulfides. The microwave pretreatment process can not only eliminate the gold-robbing effect of "gold-robbing carbon" in the cyanidation leaching stage, but also activate and wrap sulfide, shorten the biological pre-oxidation time, and achieve the purpose of efficient leaching of carbonaceous refractory gold ores.

Description

technical field [0001] The invention belongs to the technical field of gold smelting, and relates to a microwave biological preoxidation gold extraction process of carbonaceous refractory gold concentrate. Background technique [0002] At present, the pre-oxidation technologies of refractory gold ores mainly include three large-scale technologies such as biological pre-oxidation, roasting pre-oxidation, and pressurized pre-oxidation. Among them, the biological pre-oxidation technology has low cost and environmental friendliness. is receiving increasing attention. However, for carbonaceous refractory gold ores containing organic carbon, the existing biological pre-oxidation system has limited degradation of organic carbon. Due to the existence of "gold-robbing carbon" in the cyanidation leaching process, part of the gold often cannot be effectively decomposed. leach. Contents of the invention [0003] The purpose of the present invention is to provide a carbonaceous refra...

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 Patents(China)
IPC IPC(8): C22B11/00C22B11/02C22B3/18
CPCC22B3/18C22B11/02C22B11/04Y02P10/20
Inventor 陈勃伟温建康宋永胜武彪尚鹤陈勇蔡镠璐周成英屈伟
Owner 有研资源环境技术研究院(北京)有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap 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