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Whole utilizing method of arsenious gold fine mine

A gold concentrate and gold ore technology, applied in chemical instruments and methods, improvement of process efficiency, ion exchange, etc., can solve problems such as gold robbery, high processing cost, environmental pollution, and reduced gold leaching rate

Inactive Publication Date: 2020-08-21
JIANGXI YIYUAN REGENERATION RESOURCE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] CN1121116A discloses a process for extracting precious metals from ores by means of cyanidation by microorganisms and a microbial cultivation device used therein, which mainly solves the shortcomings of existing processes such as high processing costs and easy environmental pollution
[0012] However, in the above-mentioned prior art, when arsenic adsorbent is used, especially carbon-containing adsorbent such as inorganic mineral adsorbent, the dissolved gold in the cyanide solution will be adsorbed away, resulting in a high leaching rate of gold in the solution. These phenomena are called "robbing money" phenomenon

Method used

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  • Whole utilizing method of arsenious gold fine mine
  • Whole utilizing method of arsenious gold fine mine
  • Whole utilizing method of arsenious gold fine mine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] The arsenic-containing polymetallic gold ore (from a gold mine in Northwest Gansu, the chemical composition analysis of the raw ore showed 2.12wt% gold and 1.51wt% arsenic) was mainly composed of sulfide-wrapped gold and semi-exposed gold, mainly composed of arsenic sulfide and It exists in the form of arsenopyrite. Add 200mL of medium solution in the pre-oxidation container, then add the arsenic-containing polymetallic gold ore to sterilize, inoculate 12ml acidophilic Thiobacillus ferrooxidans after sterilization, then add 12g / L of the formula (1) The adsorbent is shown, the pre-oxidation temperature is normal temperature (28-30°C), the rotation speed of the agitator is 80-100r / min, the liquid-solid ratio of biological oxidation is 5-25ml / g, and the solution potential of the bacterial pre-oxidation system is controlled to be 500-550mv. The time range for pre-oxidation is 5-9 days. After the bacterial pre-oxidation is completed, adjust the pulp concentration and pH val...

Embodiment 2

[0056] Repeat the example, the only difference from Example 1 is that the adsorbent is replaced by the adsorbent shown in formula (3). After detection and calculation, the leaching rate of arsenic is 88.6%, and the recovery rate of gold is 89.7%.

[0057] As can be seen from Examples 1 and 2, when the adsorbent shown in formula (3) is used, it can be more beneficial to the adsorption of arsenic, the adsorption mechanism may be more effective, and the fallen Fe 3+ Can promote the proliferation of bacteria.

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Abstract

The invention provides a whole utilizing method of an arsenious gold fine mine. The whole utilizing method comprises the following steps of (1) performing crushing, milling and acidification on a goldmine; (2) performing bacteria preoxidation on the gold mine subjected to crushing, milling and acidification, and adding an arsenic adsorbing agent to the bacteria preoxidation system; (3) performingthickening treatment to obtain an upper floating layer, clear liquid and an underflow; (4) performing neutralizing, cyanation and lixiviating on the underflow for recovery of gold; and (5) recoveringarsenic from the upper floating layer. Through the adoption of the whole utilizing method disclosed by the invention, arsenic in the arsenious gold fine mine can be subjected to selective adsorption,and besides, the behavior of low gold leaching efficiency due to gold adsorption and taking away can be avoided.

Description

technical field [0001] The invention belongs to the technical field of metal smelting, especially the technical field of hydrometallurgy, and more specifically relates to an overall utilization method of arsenic-containing gold concentrate, in particular to recovering gold from arsenic-containing gold concentrate, especially refractory gold ore containing sulfur and arsenic A method for recycling arsenic. Background technique [0002] Arsenic-containing gold ores such as arsenic-containing gold concentrates are generally recognized as difficult-to-treat types of gold ores, but they are also the gold ores with the largest processing capacity and the highest recoverable economic value. my country's arsenic-containing gold resources are mainly distributed in the southwest, northwest and northeast regions. The difficulty in the treatment of arsenic-containing gold ores is that gold minerals are closely symbiotic with arsenic-containing minerals (mainly arsenopyrite) and pyrite....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/18C22B3/04C22B3/22C22B11/08C22B30/04B01J20/26B01D15/08B01J20/30
CPCB01D15/08B01J20/264C22B3/04C22B3/18C22B3/22C22B11/08C22B30/04Y02P10/20
Inventor 张平王义凤丁西耀吕献华徐文辉
Owner JIANGXI YIYUAN REGENERATION RESOURCE CO LTD
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