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Process for recovering precious metal from sulphide ore based on thiosulfate leaching method

A technology of thiosulfate and precious metal thiosulfuric acid, which is applied in photography technology, photography auxiliary technology, process efficiency improvement, etc., can solve the problems of slow recovery speed, small adsorption capacity, high cost, etc., and achieve simple and efficient adsorbent The effect of desorption and simple operation

Active Publication Date: 2019-05-24
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process can improve the shortcomings of slow recovery, low efficiency, high cost, adsorbent reuse, small gold / silver adsorption, and low efficiency in other methods; on the basis of adsorption, it can also remove precious metal complex ions from the Desorption on the material to realize the reuse of the adsorbent material and reduce the cost in the recycling process

Method used

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  • Process for recovering precious metal from sulphide ore based on thiosulfate leaching method
  • Process for recovering precious metal from sulphide ore based on thiosulfate leaching method
  • Process for recovering precious metal from sulphide ore based on thiosulfate leaching method

Examples

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Comparison scheme
Effect test

Embodiment 1

[0047] A kind of sulfide ore recovery precious metal technology based on thiosulfate leaching method comprises the following steps:

[0048] Select a gold ore from a concentrator, grind it in a solution containing ammonium thiosulfate, ammonium sulfite, and ammonia water, send the ground pulp to the leaching equipment, add an appropriate amount of water to control the concentration of the pulp, and lower the temperature Controlled at 50°C, heated and stirred for leaching for 10h. After testing, the leaching rate of gold reaches 93%, and the gold content in the leaching solution is 1mg / L;

[0049]Obtain 1L of the obtained leaching solution, adjust the pH of the leaching solution to 12.00; put 0.03g of molybdenite in the leaching solution to absorb gold thiosulfate complex for 50 hours; put the gold-loaded molybdenite obtained by separation and removal of impurities into 14% NaOH solution , ultrasonicated for 60 min at room temperature to obtain gold-containing noble solution. ...

Embodiment 2

[0052] A kind of sulfide ore recovery precious metal technology based on thiosulfate leaching method comprises the following steps:

[0053] Select a gold ore from a concentrator, grind it in a solution containing ammonium thiosulfate, ammonium sulfite, and ammonia water, send the ground pulp to the leaching equipment, add an appropriate amount of water to control the concentration of the pulp, and lower the temperature Controlled at 50°C, heated and stirred for leaching for 10h. After testing, the leaching rate of gold reaches 93%, and the gold content in the leaching solution is 1mg / L;

[0054] Obtain 10L of the obtained leaching solution, adjust the pH of the leaching solution to 12.00; put 0.3g of chalcopyrite in the leaching solution to absorb gold thiosulfuric acid complex for 50h; put the gold-loaded chalcopyrite obtained by separating and removing impurities into 4% NaOH solution , ultrasonicated for 60 min at room temperature to obtain gold-containing noble solution....

Embodiment 3

[0057] A kind of sulfide ore recovery precious metal technology based on thiosulfate leaching method comprises the following steps:

[0058] Select a gold ore from a concentrator, grind it in a solution containing ammonium thiosulfate, ammonium sulfite, and ammonia water, send the ground pulp to the leaching equipment, add an appropriate amount of water to control the concentration of the pulp, and lower the temperature Controlled at 50°C, heated and stirred for leaching for 10h. After testing, the leaching rate of gold reaches 93%, and the gold content in the leaching solution is 1mg / L;

[0059] Obtain 1L of the obtained leaching solution, adjust the pH of the leaching solution to 10.00; put 0.03g of galena in the leaching solution to absorb the gold thiosulfuric acid complex for 50 hours; put the gold-loaded galena obtained by separation and removal of impurities into 14% NaOH In the solution, sonicate for 10 min at room temperature to obtain a precious solution containing ...

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Abstract

The invention discloses a process for recovering precious metal from sulphide ore based on a thiosulfate leaching method. The process comprises the following steps: ore containing the precious metal is selected and placed in a thiosulfate solution to be ground, and ore pulp after ore grinding is leached; leaching liquid is obtained, and the sulphide ore is placed into the leaching liquid to adsorbthiosulfuric acid complexes of the precious metal; a solution after adsorption is filtered and dewatered, and the sulphide ore loaded with the precious metal thiosulfuric acid complexes is obtained;the precious metal thiosulfuric acid complexes are desorbed from the sulphide ore, and precious liquid containing precious metal complex ions is obtained; and the obtained precious liquid is electrolyzed, and a precious metal simple substance is obtained. Through the sulphide ore, the adsorption quantity on Au / Ag can reach the situation that an adsorbent adsorbs tens of milligrams of Au / Ag per gram, and the adsorption quantity is much larger than that of an existing adsorbent; meanwhile, Au / Ag is desorbed from the adsorbent through a NaOH solution or a Na2S solution; and the method is easy tooperate, the adsorbent is simple and easy to obtain, the adsorption effect on Au / Ag is good, and meanwhile Au / Ag is efficiently desorbed.

Description

technical field [0001] The invention belongs to the technical field of hydrometallurgy, and in particular relates to a process for recovering precious metals from sulfide ores based on a thiosulfate leaching method. Background technique [0002] The process of extracting precious metals by thiosulfate has the characteristics of fast leaching rate, high leaching rate, and environmental friendliness. It is often used to extract precious metals from metal waste in urban mines and to treat precious metal ores containing copper, carbon, and other cyanides that are difficult to treat. It is considered It is a non-cyanidation method for extracting precious metals that has the most potential for industrial application. However, there is still a lack of suitable methods for the recovery of precious metals from thiosulfate solutions, which greatly limits the wide application of the thiosulfate method in industry. [0003] At present, the commonly used methods for recovering gold / silv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/04C22B3/24C22B11/00C25C1/20
CPCY02P10/20
Inventor 贾菲菲曾仕琳宋少先
Owner WUHAN UNIV OF TECH
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