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Method for leaching arsenic containing carbon gold ore through pyrolusite in high pressure and non-cyanidation manner

A pyrolusite and non-cyanation technology, which is applied in the field of pyrolusite high-pressure-non-cyanide leaching of arsenic-containing carbonaceous gold ores, can solve the problems of low resource utilization rate, high technical difficulty, long production cycle, etc., and achieve resource utilization. The effect of high efficiency, comprehensive resource utilization, and reduction of pharmaceutical costs

Inactive Publication Date: 2018-09-04
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the production cycle of this method is long, the strains are not easy to obtain, and it is impossible to treat gold mines with high carbon content
[0007] In summary, the current pretreatment methods for arsenic-containing carbonaceous gold ore have problems such as high technical difficulty, serious environmental pollution, high cost, high energy consumption, and low resource utilization.

Method used

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  • Method for leaching arsenic containing carbon gold ore through pyrolusite in high pressure and non-cyanidation manner

Examples

Experimental program
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Effect test

Embodiment 1

[0038] Such as figure 1 As shown, a method for high-pressure-non-cyanidation leaching of arsenic-containing carbonaceous gold ore from pyrolusite. The arsenic-containing carbonaceous gold ore minerals are taken from a high-arsenic and high-carbon refractory gold concentrate in Xinjiang, containing 10% carbon and sulfur 15%, 5% arsenic, gold grade 52g / t, pyrolusite grade 40%.

[0039] Take 10g of the above-mentioned gold concentrate, 30g of pyrolusite is ground to -200 by a ball mill, accounting for 80%, and the pyrolusite is acidified with 50ml of sulfuric acid with a concentration of 5%, and then mixed evenly with the gold concentrate and moved to a magnetic heater for one-stage leaching. The speed is 5:1, the speed is adjusted to 400rad / min, the leaching reaction temperature is 60°C, and the leaching reaction time is 4h. After the reaction is completed, use a vacuum filter to separate the solid from the liquid, and repeatedly wash the leaching residue 7 times with a sulfuric...

Embodiment 2

[0041] Such as figure 1 As shown, a method for leaching arsenic-containing carbonaceous gold ore from pyrolusite under high pressure-non-cyanide leaching. The arsenic-containing carbonaceous gold ore is obtained from a low-arsenic and low-carbon flotation gold concentrate in Yunnan. The ore contains 4% carbon, It contains 1% sulfur and 1% arsenic, the grade of gold is 32g / t, and the grade of pyrolusite used is 27%.

[0042] Take 10g of the above-mentioned gold concentrate, 40g of pyrolusite is ground to -200 by a ball mill respectively, accounting for 80%, and the pyrolusite is acidified with 80ml of sulfuric acid with a concentration of 5%, and then mixed evenly with the gold concentrate and moved to a magnetic heater for one-stage leaching. 10:1, adjust the rotation speed to 500rad / min, the leaching reaction temperature is 80°C, and the leaching reaction time is 2h. After the reaction is completed, use a vacuum filter to separate the solid from the liquid, and repeatedly wash ...

Embodiment 3

[0044] Such as figure 1 As shown, a method for leaching arsenic-containing carbonaceous gold ore from pyrolusite under high pressure-non-cyanide leaching. The arsenic-containing carbonaceous gold ore is obtained from a low-arsenic and high-carbon Carlin type gold concentrate in Guizhou, and the ore contains 13% carbon , containing 8% sulfur and 1.5% arsenic, the grade of gold is 49g / t, and the grade of pyrolusite used is 43%.

[0045] Take 10g of the above-mentioned gold concentrate, and 50g of pyrolusite are respectively ground to -200 by a ball mill, accounting for 80%. The pyrolusite is acidified with 80ml of sulfuric acid with a concentration of 10%, and then mixed with the gold concentrate and evenly moved to a magnetic heater for one-stage leaching. The liquid-solid ratio 5:1, adjust the speed to 400rad / min, the leaching reaction temperature is 70°C, and the leaching reaction time is 3h. After the reaction is completed, use a vacuum filter to separate the solid from the ...

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Abstract

The invention discloses a method for leaching arsenic containing carbon gold ore through pyrolusite in a high pressure and non-cyanidation manner. The method comprises the following steps that firstly, the arsenic containing carbon gold ore is mechanically activated; secondly, pyrolusite ore is taken and subjected to acidification through sulfuric acid to serve as a leaching agent, the leaching agent is added in the arsenic containing carbon gold ore treated in the first step, and first-section leaching is conducted; thirdly, after first-section leaching is conducted, solid-liquid separation is conducted, first-section leaching liquid and leaching slag are obtained, and the leaching slag is washed through weak-acid washing liquid; fourthly, cyanuric acid salt obtained after sulfuric acid acidification serves as a leaching agent, the leaching agent is added in the washed leaching slag obtained after acid acidification, and second-section leaching is conducted; fifthly, after second-section leaching, solid-liquid separation is conducted, and after washing is conducted through deionized water, second-section leaching liquid and tailings slag are obtained; and sixthly, the first-section leaching liquid and the second-section leaching liquid are subjected to separation and purification treatment. According to the method, effective and comprehensive utilization of carbon, sulfur andarsenic in the arsenic containing carbon gold ore can be achieved, the recycling rate of gold, iron, manganese, sulfur, arsenic and other valuable elements reaches 95% or above, and the resource utilization rate is high.

Description

technical field [0001] The invention belongs to the field of comprehensive utilization of mineral processing resources, and in particular relates to a high-pressure-non-cyanidation leaching method of arsenic-containing carbonaceous gold ore from pyrolusite. Background technique [0002] With the advancement of technology and economic development, the demand for gold in the market is increasing, and the easy-to-handle gold ore resources are increasingly exhausted, and the difficult-to-handle gold ore has become an important resource of gold. Gold in refractory gold ores is wrapped or impregnated in sulfide minerals in the form of fine particles or sub-obvious particles, which is difficult to be leached; carbonaceous substances, humus and other gold-robbing substances often exist in the ore, and gold complexes are first adsorbed in the leached gold Enter the slag phase, causing the loss of gold. In my country's proven gold reserves, 30% are refractory gold ores, some of which...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/08C22B11/00C22B47/00C22B30/04
CPCC22B3/08C22B11/04C22B30/04C22B47/00Y02P10/20
Inventor 李浩然王洪君杜竹玮康金星
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI