Pre-treatment method for micro-disseminated type refractory primary gold ore

A technology of pretreatment and pretreatment time, applied in the direction of improvement of process efficiency, etc., can solve the problems of low concentration of ore pulp, limitation of strain adaptability, long treatment cycle and other problems of biological oxidation method, achieve short cycle, reduce pretreatment cost, The effect of increasing the leaching rate

Active Publication Date: 2015-09-16
GUIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The pulp concentration of the biological oxidation method is low, the treatment cycle is long, and there are various restrictions on the adaptability of the bacteria
Simple alkaline leaching pretreatment, the leaching rate is low, and the investment in hot-pressed alkaline leaching is too high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1 of the present invention: the method for the pretreatment of fine dissemination type refractory primary gold ore, at first primary gold ore is processed with ball mill, makes grinding fineness-0.074mm account for about 95%; Carry out pulping, make ore slurry The solid ratio is 3:1; add 10 kg / t of gold ore potassium persulfate and 2 kg / t of gold ore ferrous sulfate to the pulp in turn for oxidative pretreatment for 4 h; then add 20 kg of gold ore Sodium hydroxide per ton of gold ore, and adjust the liquid-solid ratio to 3:1, carry out alkaline leaching pretreatment for 10 h; finally add a leaching agent whose main component is sodium cyanate for leaching, and the dosage is 10 kg / t gold ore , and adjusted the liquid-solid ratio to 3:1, and the leaching time was 12 h; the leaching residue was filtered, washed several times and dried to prepare the sample, and the sample was prepared by high-temperature burning-aqua regia solution-polyurethane foam adsorption-th...

Embodiment 2

[0016] Embodiment 2 of the present invention: the method for the pretreatment of fine dissemination type refractory primary gold ore, at first primary gold ore is processed with ball mill, makes grinding fineness-0.074mm account for about 95%. ; Slurry adjustment is carried out so that the liquid-solid ratio of the slurry is 3:1; the potassium persulfate of 4kg / t gold ore and the ferrous sulfate of 2 kg / t gold ore are added successively to the slurry, and the oxidation pretreatment is carried out for 4 h; Then add 20 kg / t gold ore sodium hydroxide to the pulp, adjust the liquid-solid ratio to 3:1, and carry out alkali leaching pretreatment for 8 hours; finally add a leaching agent whose main component is sodium cyanate for leaching, the dosage It was 10 kg / t gold ore, and the liquid-solid ratio was adjusted to 3:1, and the leaching time was 4 h; the leaching residue was filtered, washed and dried for many times to prepare samples, and the sample was prepared by high-temperature...

Embodiment 3

[0017] Embodiment 3 of the present invention: the method for the pretreatment of fine dissemination type refractory primary gold ore, at first primary gold ore is processed with ball mill, makes grinding fineness-0.074 mm account for about 95%; Carry out pulping, make ore slurry The solid ratio is 3:1; add 4 kg / t of gold ore potassium persulfate and 2 kg / t of gold ore ferrous sulfate to the pulp in sequence for oxidative pretreatment for 2 h; then add 20 kg / t of gold ore to the pulp t sodium hydroxide of gold ore, and adjust the liquid-solid ratio to 3:1, carry out alkali leaching pretreatment for 8 h; finally add the leaching agent whose main component is sodium cyanate for leaching, the dosage is 10 kg / t gold ore, The liquid-solid ratio was adjusted to 3:1, and the leaching time was 4 h; the leaching residue was filtered, washed several times, and dried to prepare samples, and the samples were prepared by high-temperature burning-aqua regia dissolution-polyurethane foam adsor...

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Abstract

The invention discloses a pre-treatment method for micro-disseminated type refractory primary gold ore. According to the pre-treatment method for the micro-disseminated type refractory primary gold ore, mashed gold ore is performed with oxidation pre-treatment, alkaline leaching pre-treatment and leaching in sequence; the method can reduce the influence of the organic carbon in the gold ore on the subsequent gold leaching, the alkaline leaching process can enable quartz packaging gold to expose, and the gold leaching efficiency is improved. Compared with a traditional hot-pressing technology, the pre-treatment method for the micro-disseminated type refractory primary gold ore is capable of finishing the reaction under normal temperature and normal pressure conditions, and the pre-treatment cost is greatly lowered; compared with roasting oxidation pre-treatment, the pre-treatment method for the micro-disseminated type refractory primary gold ore has advantages of low energy consumption and environment friendliness; compared with a biological oxidation method, the period is short. The pre-treatment method for the micro-disseminated type refractory primary gold ore is easy to operate, low in cost and ideal in use effect.

Description

technical field [0001] The invention relates to the technical field of gold mining and dressing, in particular to a method for pretreatment of fine dissemination type refractory primary gold ore. Background technique [0002] The depletion of easy-to-separate ores makes more and more attention to difficult-to-separate ores. Since the 1980s, fine-grained disseminated gold deposits of different scales have been discovered successively in Guangxi, Guizhou, and Yunnan, forming the "Golden Triangle" of Yunnan, Guangxi, and Guizhou. In addition, similar gold deposits have also been found in Northwest Sichuan, Qinling, Central Hunan, Southwest Hubei, Northwest Jiangxi and Xinjiang. Gold in ores is mainly present in the surface, cracks and lattices of minerals such as quartz, sulfide, carbonate and silicate in the form of adsorbed gold and lattice gold. When the ore contains carbonaceous matrix and sulfide, it is a double refractory gold ore. [0003] Pretreatment is an essential...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B11/08C22B1/00C22B3/12
CPCY02P10/20
Inventor 唐云唐立靖王莹杨典奇
Owner GUIZHOU UNIV
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