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A method for comprehensive clean recovery of gold, carbon, sulfur and silicon in carbonaceous gold ore

A technology of silicon element and gold ore, which is applied in the treatment field of carbon-containing gold ore, can solve problems such as ineffective treatment, and achieve the effects of improving gold leaching efficiency, broad application prospects and high recovery rate

Inactive Publication Date: 2019-01-08
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Calcined sand after calcination is beneficial to gold leaching, but cannot effectively treat gold particles wrapped by silicon-containing minerals

Method used

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  • A method for comprehensive clean recovery of gold, carbon, sulfur and silicon in carbonaceous gold ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A carbon-bearing gold mine in Sichuan, the chemical multi-element analysis results of the carbon-gold mine are as follows (%):

[0029] TC

Au*

SiO 2

S

As

Mg

Al

P

K

Fe

Cu

Zn

18.2

30.32

57.57

6.02

0.07

0.03

5.6

0.98

1.1

3.85

0.08

0.53

[0030] *Unit: g / t

[0031] Grind the carbon-gold ore for 10 minutes, the carbon-gold ore-400 mesh accounts for 8wt%, mix the ground carbon-gold ore and sodium hydroxide in a mass ratio of 4:3 and add 8% of the total mass of deionized water Stir evenly; press the mixed sample into balls, and the weight of a single ball is about 50g.

[0032] The pressed balls are first dried in an oven, then transferred to a muffle furnace and roasted at a temperature of 750°C for 2 hours; after the roasted carbon gold ore is cooled, it is fully pulverized in a high-speed universal pulverizer; after pulverization, it is transferred to a high-pressure Deionized w...

Embodiment 2

[0034] A carbon-bearing gold mine in Guizhou, the chemical multi-element elemental analysis results of the carbon-gold mine are as follows (wt%):

[0035] TC

Au*

SiO 2

S

As

Fe

mn

Ca

Mg

Al

K

16.45

28.67

58.66

1.53

0.26

2.64

0.12

2.99

0.97

3.89

1.17

[0036] *Unit: g / t

[0037] Grind carbon-gold ore for 10 minutes, carbon-gold ore-400 mesh accounts for 10wt%, mix the ground carbon-gold ore and sodium hydroxide in a mass ratio of 3:2 and add 10% of the total mass of deionized water Stir evenly; press the mixed sample into balls, and the weight of a single ball is about 50g.

[0038] Dry the pressed balls in an oven first, then transfer them to a muffle furnace and roast them at 700°C for 2.5 hours; after the roasted carbon gold is cooled, it is fully pulverized in a high-speed universal pulverizer; after pulverization, it is transferred to an autoclave Deionized water was added to the mixtu...

Embodiment 3

[0040] A gold concentrate of a carbon-bearing gold mine in Yunnan, the chemical multi-element analysis results of the carbon-gold mine are as follows (wt%):

[0041] TC

Au*

SiO 2

S

Fe

Cu

As

Ca

Mg

19.56

31.89

39.19

18.81

11.12

0.103

2.01

2.39

3.26

[0042] *Unit: g / t

[0043] Grind the carbon-gold ore for 10 minutes, carbon-gold ore-400 mesh accounts for 20wt%, mix the ground carbon-gold ore and sodium hydroxide in a mass ratio of 5:3 and add 8% of the total mass of deionized water Stir evenly; press the mixed sample into balls, and the weight of a single ball is about 50g.

[0044]Dry the pressed balls in an oven first, then transfer them to a muffle furnace and roast them at a temperature of 650°C for 2 hours; after the roasted carbon gold is cooled, it is fully pulverized in a high-speed universal pulverizer; after pulverization, it is transferred to an autoclave Deionized water was added to the m...

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Abstract

The invention discloses a method for comprehensive cleaning and recovery of gold, carbon, sulfur and silicon elements in carbonaceous gold ore. The method includes: fully mixing sodium hydroxide with carbonaceous gold ore and performing pelletizing, and conducting high temperature roasting to decompose sulfide ore, oxidize carbon and fully expose the gold particles wrapped in the sulfide ore and adsorbed by carbon so as to improve the gold leaching rate, applying the generated carbon and sulfur oxides to preparation of non-cyanide leaching stabilizers; subjecting the roasting residue to high pressure and high temperature water leaching to produce sodium silicate so as to promote the exposure of gold particles and improve the subsequent gold leaching efficiency, and subjecting the filter residue to gold leaching by a non-cyanide reagent and a stabilizer. The method provided by the invention has the advantages of simple process, high recovery rate of gold, reasonable utilization of carbon, sulfur and silicon elements in raw ore, and can obtain the by-product sodium silicate, improves the comprehensive benefits, and the process is green and environment-friendly. The gold recovery rate can reach 90% or more, the silicon recovery rate can reach 99% or more, and the recovery rate of carbon and sulfur can reach 95% or more. The technology has wide application prospect and high resource utilization rate.

Description

technical field [0001] The invention relates to the field of processing carbon-containing gold ores, in particular to a method for comprehensively cleaning and recovering gold, carbon, sulfur and silicon elements in carbon-containing gold ores. Background technique [0002] With the increasing scale of gold production, easy-to-treat gold ore resources are gradually exhausted, and difficult-to-treat silicon- and carbon-containing (graphite) gold ores have gradually become the main resource. There are carbonaceous substances (graphite or other forms of carbonaceous substances) in the ore. If they are directly cyanided and leached, these carbonaceous substances have a very strong adsorption activity for gold cyanide, so that a part of the leached gold cyanide is absorbed by the carbonaceous substances in the ore. Adsorbed and lost with the tailings, the recovery rate is reduced, and this type of ore brings great difficulties to the gold extraction process. Research on the trea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B11/00C22B1/02C22B3/14
CPCC22B1/02C22B3/14C22B11/04Y02P10/20
Inventor 李浩然王昌杜竹玮孙铭
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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