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Method for extracting gold from refractory carbonaceous oxidized ore

A technology of oxidizing ore and leaching carbon, applied in the field of hydrometallurgy, it can solve problems such as stagnant ore, and achieve the effect of short process, low investment and easy operation.

Active Publication Date: 2015-02-18
CHINA NONFERROUS METAL (GUILIN) GEOLOGY & MINING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no report on the basic research on the adsorption mechanism of carbonaceous substances to dissolved gold in gold mines or the "robbing gold" properties of carbonaceous substances in my country, and the industrial development and utilization of carbonaceous substances to oxidize gold mines has not been carried out. Therefore, most of these Mineral resources are in the state of "dead mine"

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Stirring passivation, leaching

[0036] (1) The composition of carbonaceous gold oxide ore: 3.7 g / ton gold and 0.9% carbon. Direct cyanide leaching of gold (verify the role of carbonaceous matter in the mineral source, the same below): crush the mineral sample to -200 to 80% for cyanide leaching of gold, sodium cyanide concentration 2 g / l, solid-liquid Ratio 1:3.0, pH 10.5-11.5, leaching time 24 hours, gold leaching rate is only 4.3%

[0037] (2) Passivation agent passivation and cyanide gold leaching: add water to the crushed ore sample to make slurry, and then add the used oil grades of 10w, 20w, 15w / 20, 10w / 40 mixed oil emulsion solution to The solid-liquid ratio is 1:3.0, and the passivating agent concentration is 500 mg / L. Passivation of carbonaceous material was carried out at room temperature and stirring conditions for 3 days. After solid-liquid separation, the solid ore sample is cyanide leaching gold at room temperature, the solid-liquid ratio is 1:3.0, pH 10.5-...

Embodiment 2

[0039] Stirring passivation, leaching

[0040] (1) The composition of carbonaceous gold oxide ore: 3.7 g / ton gold and 0.9% carbon. Direct gold cyanide leaching (verify the role of carbonaceous matter in the mineral source for "gold robbing", the same below): crush the mineral sample to -200 to 80% for cyanide gold leaching, sodium cyanide concentration 2 g / l, solid-liquid Ratio 1:3.0, pH 10.5-11.5, leaching time 24 hours, gold leaching rate is only 4.3%

[0041] (2) Passivation agent passivation and cyanide gold leaching: add water to the crushed ore sample to make slurry, and then add the used oil grades of 10w, 20w, 15w / 20, 10w / 40 mixed oil emulsion solution to The solid-liquid ratio is 1:3.0, and the passivating agent concentration is 500 mg / L. Passivation of carbonaceous materials was carried out at room temperature and stirring conditions for 7 days. After solid-liquid separation, the solid ore sample is leached gold by cyanidation at room temperature. The solid-liquid rati...

Embodiment 3

[0043] Stirring passivation, leaching

[0044] (1) The composition of carbonaceous gold oxide ore: 3.7 g / ton gold and 0.9% carbon. Direct gold cyanide leaching (verify the role of carbonaceous matter in the mineral source for "gold robbing", the same below): crush the mineral sample to -200 to 80% for cyanide gold leaching, sodium cyanide concentration 2 g / l, solid-liquid Ratio 1:3.0, pH 10.5-11.5, leaching time 24 hours, gold leaching rate is only 4.3%

[0045] (2) Passivation agent passivation and cyanide gold leaching: the above-mentioned crushed ore sample is mixed with water to make a slurry, and the used oil grades are 5w, 5w / 10 and 20W / 40 (the weight ratio of the three oils is 1 :1:1) The oil emulsified aqueous solution to a solid-liquid ratio of 1:3.0 and a passivator concentration of 100 mg / L. Passivation of carbonaceous materials was carried out at room temperature and stirring conditions for 7 days. After solid-liquid separation, the solid sample is leached gold at ro...

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PUM

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Abstract

The invention discloses a method for extracting gold from refractory carbonaceous oxidized ore. The method comprises two steps: first, the gold absorbing activities of carbonaceous substances are weakened through used engine oil of motor vehicles or azo dyes, and then CIL cyanide gold leaching technology or a heap leaching technology is used for leaching gold. The method is short in flow, small in investment, easy to operate, economical and high in efficiency.

Description

Technical field [0001] The present invention belongs to the field of hydrometallurgy, and relates to a method for extracting gold from difficult-to-leaching carbonaceous oxide ore. Specifically, it uses organic solvents or dyes to passivate the “golden” activity of carbonaceous matter in mineral sources and / or adopt CIL (carbon slurry leaching) and heap leaching technology are combined to improve the recovery rate of gold leaching. Background technique [0002] Gold is the earliest metal discovered and used by mankind. It has high dispersion and low content. Its abundance in the crust is less than 0.004ppm. In addition, it has special physical and chemical properties such as chemical stability, gloss, color, conductivity and ductility. Gold has long been used as precious jewelry and financial reserves. In recent decades, gold has also been widely used in modern high-tech industries, such as electronics, communications, aerospace, chemical, medical and other fields. [0003] With...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B11/08
Inventor 李尽善吕智周卫宁
Owner CHINA NONFERROUS METAL (GUILIN) GEOLOGY & MINING CO LTD
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