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Method for adsorbing precious metal complex ions in thiosulfate leaching agent through sulphide ore

A technology of thiosulfate and thiosulfuric acid is applied in the direction of improving process efficiency, which can solve the problems of low efficiency and small amount of gold/silver adsorption, and achieve the effect of reducing recovery cost.

Active Publication Date: 2019-06-07
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method can not only improve the shortcomings of small gold / silver adsorption and low efficiency in other methods, but also reduce the cost in the recovery process

Method used

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  • Method for adsorbing precious metal complex ions in thiosulfate leaching agent through sulphide ore
  • Method for adsorbing precious metal complex ions in thiosulfate leaching agent through sulphide ore
  • Method for adsorbing precious metal complex ions in thiosulfate leaching agent through sulphide ore

Examples

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Effect test

Embodiment 1

[0032] Use gold standard solution and ammonium thiosulfate to prepare a gold thiosulfate complex solution with a gold concentration of 100mg / L, and adjust the pH of the solution to 12.00; then place 1.5g pyrite in 500mL gold thiosulfate complex Gold thiosulfuric acid complex ion was adsorbed in the solution for 50 hours; pyrite was separated by filtration, and the adsorption capacity of pyrite to gold was 17.965mg / g through graphite furnace atomic absorption spectrometry test and calculation.

Embodiment 2

[0034] Use gold standard solution and ammonium thiosulfate to prepare a gold thiosulfate complex solution with a gold concentration of 100mg / L, and adjust the pH of the solution to 12.00; then place 1.5g of chalcopyrite in 500mL gold thiosulfate complex Gold thiosulfuric acid complex ion was adsorbed in the solution for 50 hours; chalcopyrite was separated by filtration, and the adsorption capacity of chalcopyrite to gold reached 20.007mg / g through graphite furnace atomic absorption spectrometry test and calculation.

Embodiment 3

[0036] Prepare a gold thiosulfate complex solution with a gold concentration of 100mg / L with gold standard solution and ammonium thiosulfate, and adjust the pH of the solution to 10.00; then place 1.5g of galena in 500mL gold thiosulfate complex Gold thiosulfuric acid complex ions were adsorbed in the solution for 48 hours; the galena was separated by filtration, and the adsorption capacity of galena to gold reached 29.369 mg / g through the graphite furnace atomic absorption spectrometry test and calculation.

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Abstract

The invention discloses a method for adsorbing precious metal complex ions in a thiosulfate leaching agent through sulphide ore. The method comprises the steps that the sulphide ore is placed in precious metal thiosulfuric acid complex solution to carry out adsorbing; the adsorbed solution is subjected to filtering and water removal, and the sulphide ore carried with precious metal thiosulfuric acid complex is obtained. Through sulphide ore surface hydrophobicity and S active sites, Au(S2O3)2<3-> / Ag(S2O3)2<3-> is adsorbed, according to the adsorption amount of gold / silver, dozens of mg of Au / Ag can be adsorbed by per g of an adsorbent, and the adsorbing amount is far larger than the adsorbing amount of the existing Au(S2O3)2<3-> / Ag(S2O3)2<3-> adsorbent. The adsorbent is simple and easy toobtain, complex machining modification is not needed, and the recycling cost of Au / Ag in the thiosulfate leaching agent can be reduced.

Description

technical field [0001] The invention belongs to the technical field of hydrometallurgy, and in particular relates to a method for adsorbing noble metal complex ions in thiosulfate leachate by sulfide ore. Background technique [0002] Thiosulfate leaching of precious metals, such as gold / silver, has the characteristics of fast leaching rate, high leaching rate, and environmental friendliness. It is often used to extract gold / silver from metal waste in urban mines and to treat refractory cyanide such as copper and carbon. The gold / silver ore is considered to be the most potential industrially applied method for extracting gold / silver without cyanidation. 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 / silver complex ions from thiosulfate leaching gold / silver liqui...

Claims

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Application Information

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