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Method for recycling gold in thiosulfate system

A technology for recovering thiosulfate and thiosulfate, applied in the fields of hydrometallurgy and precious metal recovery, can solve the problems of secondary environmental pollution and complex modification process, and achieve high recovery rate, simple process and low cost. Effect

Inactive Publication Date: 2020-04-14
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method can effectively adsorb gold in the thiosulfate gold leaching solution, and does not use any cyanide-containing (CN - ) or heavy metals and other toxic and harmful substances; it overcomes the shortcomings of secondary environmental pollution and complex modification process in the current method of activated carbon modification; the method of the present invention is simple and easy to operate, efficient and feasible

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The method for recovering gold in the thiosulfate system adopts mercaptan as an additive and contains Au(S 2 o 3 ) 2 3- Add mercaptans to the solution, and then you can directly use unmodified commercial activated carbon to adsorb gold.

[0019] Include the following steps:

[0020] Step 1. Wash with deionized water to remove the ash content of 2.0g of activated carbon, filter, dry at 100°C for 48 hours, and dry the water;

[0021] Step 2, in 100mL, 10mg / L contains Au(S 2 o 3 ) 2 3- solution to adjust the pH value to 8, to Au(S 2 o 3 ) 2 3- Add 1g of activated carbon to the solution;

[0022] Step 3, add 0.1g additive (sodium 2-mercaptobenzothiazole, belongs to mercaptide in the solution of step 2, and the addition amount of additive is to contain Au(S 2 o 3 ) 2 3- 0.1% of the solution mass), start the gold adsorption process for 24h.

[0023] After the above-mentioned adsorption in step 3, the gold concentration in the solution is measured by atomic ab...

Embodiment 2

[0025] The method for recovering gold in the thiosulfate system adopts mercaptan as an additive and contains Au(S 2 o 3 ) 2 3- Add mercaptans to the solution, and then you can directly use unmodified commercial activated carbon to adsorb gold.

[0026] Include the following steps:

[0027] Step 1. Wash with deionized water to remove the ash content of 2.0g of activated carbon, filter, dry at 100°C for 48 hours, and dry the water;

[0028] Step 2, in 100mL, 10mg / L contains Au(S 2 o 3 ) 2 3- solution to adjust the pH value to 8, to Au(S 2 o 3 ) 2 3- Add 1g of activated carbon to the solution;

[0029] Step 3, in the solution of step 2, add 0.001g additive (1-phenyl-5-mercaptotetrazolium, belong to tetraazacyclic mercaptan, additive addition is to contain Au(S 2 o 3 ) 2 3- 0.001% of the solution mass), start the gold adsorption process for 24h.

[0030] After the above-mentioned adsorption in step 3, the gold concentration in the solution is measured by atomic ab...

Embodiment 3

[0032] The method for recovering gold in the thiosulfate system adopts mercaptan as an additive and contains Au(S 2 o 3 ) 2 3- Add mercaptans to the solution, and then you can directly use unmodified commercial activated carbon to adsorb gold.

[0033] Include the following steps:

[0034] Step 1. Wash with deionized water to remove the ash content of 2.0g of activated carbon, filter, dry at 100°C for 48 hours, and dry the water;

[0035] Step 2, in 100mL, 30mg / L contains Au(S 2 o 3 ) 2 3- solution to adjust the pH value to 8, to Au(S 2 o 3 ) 2 3- Add 1g of activated carbon to the solution;

[0036] Step 3, add 0.5g additive (0.4g 2-mercaptobenzoxazole, belongs to benzoxazole mercaptan, the addition amount of additive is containing Au(S) to the solution of step 2 2 o 3 ) 2 3- 0.5% of the solution mass), start the gold adsorption process for 24h.

[0037] After the above-mentioned adsorption in step 3, the gold concentration in the solution is measured by atomi...

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Abstract

The invention relates to a method for recycling gold in a thiosulfate system, and belongs to the technical field of hydrometallurgy and precious metal recycling. According to the method for recoveringgold in the thiosulfate system, mercaptan is adopted as an additive, mercaptan is added into a solution containing Au(S2O3)2<3->, and then unmodified commercial activated carbon can be directly usedfor adsorbing gold. The method is simple in process, low in cost and high in gold recovery rate; the gold in the thiosulfate gold leaching solution can be adsorbed without modifying the activated carbon, so that the time and the cost are saved; potential dangers and environmental pollution possibly existing in the modifier process are avoided.

Description

technical field [0001] The invention relates to a method for recovering gold in a thiosulfate system, belonging to the technical fields of hydrometallurgy and precious metal recovery. Background technique [0002] Thiosulfate gold leaching is considered to be the most promising non-toxic and non-toxic method for industrialization because of its non-toxicity, environmental protection, suitability for processing gold ores containing copper, arsenic, antimony, carbon, etc. Cyanide Gold Extraction Reagent. With the continuous mining of gold mines around the world, the composition of today's gold mines is becoming more and more complex, and the gold content is getting poorer, which makes the mainstream cyanide gold extraction method have to increase the amount of cyanide reagent. In addition, the requirements of relevant departments for the development and utilization of mineral resources have been increasing year by year, making the thiosulfate gold extraction method the first ...

Claims

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Application Information

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IPC IPC(8): C22B11/00C22B3/24
CPCC22B11/04C22B3/24Y02P10/20
Inventor 字富庭陈云龙陈树梁林玥李鑫容李娇胡显智
Owner KUNMING UNIV OF SCI & TECH
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