Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for extracting gold from gold-bearing oxide ore

A technology for oxidizing ore and ore pulp, applied in the field of gold extraction, can solve the problems of high energy consumption, complicated equipment flow and poor economic benefits, etc.

Active Publication Date: 2017-05-10
YUNNAN GOLD MINING GRP
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For low-grade gold-bearing oxide ores, if conventional cyanidation is used to extract gold, the process and equipment will be complicated, the operation cycle will be long, and the energy consumption will be large; but if the pretreatment technology is used, the cost is too high, the energy consumption will be large, and the economic benefits will be bad; instead of The cyanide leaching method is still in the stage of laboratory research

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
  • Method for extracting gold from gold-bearing oxide ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Experimental raw materials:

[0053] The ores of gold-bearing oxide ores all come from a mine in Yunnan Province, which are low-grade gold-bearing oxide ores, with a gold content of 1.57g / t and a silver content of 37.2g / t.

[0054] Experimental steps:

[0055] (1) Finely grind the ore containing gold oxide ore to -325 mesh>85%;

[0056] (2) Add 8kg / t of lime to the finely ground ore as a protective base, and adjust the slurry at 2:1 according to the liquid-solid ratio to obtain the ore slurry;

[0057] (3) Put the ore pulp into the autoclave, add 2kg / t sodium cyanide, feed air, adjust the pressurized pressure to 0.6MPa, the stirring speed to 800r / min, and pre-cyanide for 1h;

[0058] (4) After the pre-cyanidation is completed, add columnar activated carbon with a particle size of +16 mesh 20g / L, and carbon soak for 8h;

[0059] (5) After the carbon leaching is finished, the gold-carrying carbon in the pulp is extracted through a 30-mesh sieve;

[0060] (6) After car...

Embodiment 2

[0062] Experimental raw materials:

[0063] The ores of the gold-bearing oxide ores all come from a mine in Yunnan, which are low-grade gold-bearing oxide ores, with a gold content of 2.51g / t and a silver content of 35.2g / t.

[0064] Experimental steps:

[0065] (1) The gold-bearing oxide ore is finely ground to -325 mesh>85%;

[0066] (2) Add 8kg / t of lime to the finely ground ore as a protective base, and adjust the slurry at a liquid-solid ratio of 3:1 to obtain the slurry;

[0067] (3) Put the ore pulp into the autoclave, add 3kg / t sodium cyanide, feed air, adjust the pressurized pressure to 0.8MPa, the stirring speed is 1000r / min, and cyanide in advance for 1h;

[0068] (4) After the pre-cyanidation is completed, add columnar activated carbon with a particle size of +16 mesh 30g / L, and carbon soak for 6h;

[0069] (5) After the carbon leaching is finished, the gold-carrying carbon in the pulp is extracted through a 30-mesh sieve;

[0070] (6) After carbon leaching tai...

Embodiment 3

[0072] Experimental raw materials:

[0073] The ores of the gold-bearing oxide ores all come from a mine in Yunnan, which are low-grade gold-bearing oxide ores, with a gold content of 3.21g / t and a silver content of 27.56g / t.

[0074] Experimental steps:

[0075] (1) The gold-bearing oxide ore is finely ground to -325 mesh>85%;

[0076] (2) Add 8kg / t of lime to the finely ground ore as a protective base, and adjust the slurry at a liquid-solid ratio of 4:1 to obtain ore slurry;

[0077] (3) Put the ore pulp into the autoclave, add 3kg / t sodium cyanide, feed air, adjust the pressurized pressure to 1.0MPa, the stirring speed to 1200r / min, and pre-cyanide for 1h;

[0078] (4) After the pre-cyanidation is completed, add columnar activated carbon with a particle size of 40 g / L at +16 mesh, and charcoal soak for 4 hours;

[0079] (5) After the carbon leaching is finished, the gold-carrying carbon in the pulp is extracted through a 30-mesh sieve;

[0080] (6) After carbon leachin...

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

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for extracting gold from gold-bearing oxide ore. The method comprises: (1) finely grinding the gold-containing oxidized ore to obtain ore powder; (2) adding water and lime to the ore powder for slurry treatment to obtain ore pulp; The autoclave performs pre-cyanation treatment on the pulp; (4) adding activated carbon to the pre-cyanidized pulp placed in the autoclave, performing cyanidation treatment and carbon leaching treatment, so that the activated carbon adsorbs the cyanidation treatment to produce (5) filtering the ore solution obtained in step (4), so as to separate the activated carbon for adsorbing complex alloy ions and the ore pulp after gold extraction; and (6) filtering the adsorbed complex alloy ions The activated carbon is desorbed to obtain gold. Using the method to extract gold, not only the gold leaching rate and the activated carbon adsorption rate are high, but also the gold extraction production process is simple, easy to operate, short production cycle and high production benefit.

Description

technical field [0001] The invention relates to the technical field of hydrometallurgy, in particular to a method for extracting gold from gold-bearing oxide ores. Background technique [0002] With the advancement of mining and dressing technology and equipment, the increase of the depth of mining deposits, and the continuous expansion of production scale, gold reserves are constantly decreasing. In order to fully and rationally mine and utilize gold resources, the research and development of gold extraction technology for gold-bearing resources such as ores and tailings that are difficult to mine, complex in nature, and low-grade has attracted more and more attention from domestic and foreign dressing and metallurgy researchers. And proposed three kinds of processing methods: 1) pre-oxidation treatment before cyanide gold leaching, such as roasting oxidation, pressurized oxidation, atmospheric pressure oxidation, bacterial oxidation, nitric acid catalytic oxidation, microw...

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): C22B11/08C22B11/00
Inventor 甘胤吴建存高起方刘志斌方锦李奇伟
Owner YUNNAN GOLD MINING GRP