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Method for reducing gold in chlorination selenium-dipping solution with reducing agent

A technology of reducing agent and chlorinated liquid, which is applied in the field of hydrometallurgy, can solve the problems of difficult operation, low recovery rate of selenium and tellurium, high investment, etc., and achieve the effect of low production cost, good effect and low pollution

Inactive Publication Date: 2014-01-22
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Or use chlorinated leaching solution to carry out the extraction of chloroauric acid, and then electrowinning after re-extraction, the process equipment investment is high, difficult to operate, and the dissolution of selenium and tellurium in the extraction agent in the extraction leads to a reduction in the recovery rate of selenium and tellurium

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The reducing agent reduces the method for gold in the chlorinated selenium leaching solution, and its concrete steps are as follows: add FeSO in the chlorinated selenium leaching solution 4 , and reduce for 30 minutes at a temperature of 60°C. After the reaction is completed, filter to obtain precipitated residue and chlorinated solution.

[0019] Wherein the concentration of selenium ion is 20.0g / L, the concentration of tellurium ion is 0.50g / L, the concentration of gold ion is 0.30g / L in the chlorination selenium leach solution; 4 The addition amount is 5 times of the amount of theoretical reduction gold.

[0020] The preparation steps of above-mentioned chlorination selenium soaking liquid are as follows:

[0021] (1) First, add copper anode slime (copper anode slime includes the following mass percentage components: 13.42% copper, 8.55% selenium, 0.92% tellurium, 0.21% gold) according to the solid-liquid ratio of 1:6g / ml at a concentration of 110g / ml LH 2 SO 4 a...

Embodiment 2

[0025] The reducing agent reduces the method for gold in the chlorinated selenium leaching solution, and its concrete steps are as follows: add FeSO in the chlorinated selenium leaching solution 4 , and reduced for 90 minutes at a temperature of 80° C., and filtered after the reaction was completed to obtain precipitated slag and chlorinated liquid.

[0026] Wherein the concentration of selenium ion is 30.0g / L, the concentration of tellurium ion is 0.80g / L, the concentration of gold ion is 0.50g / L in the chlorinated selenium soaking solution; 4 The addition amount is 10 times of the amount of theoretical reduction gold.

[0027] The preparation steps of above-mentioned chlorination selenium soaking liquid are as follows:

[0028] (1) First, add copper anode slime (copper anode slime includes the following mass percentage components: 13.42% copper, 8.55% selenium, 0.92% tellurium, 0.21% gold) according to the solid-liquid ratio of 1:10g / ml at a concentration of 110g / ml LH 2 ...

Embodiment 3

[0032] The reducing agent reduces the method for gold in the chlorinated selenium leaching solution, and its concrete steps are as follows: add FeCl in the chlorinated selenium leaching solution 2 , reduced at a temperature of 70° C. for 60 minutes, and filtered after the reaction was completed to obtain precipitated residue and chlorinated solution.

[0033] Wherein the concentration of selenium ion is 25g / L, the concentration of tellurium ion is 0.7g / L, the concentration of gold ion is 0.45g / L in the selenium chlorination solution; 2 The addition amount is 8 times of the amount of theoretical reduction gold.

[0034] The preparation steps of above-mentioned chlorination selenium soaking liquid are as follows:

[0035] (1) First, add copper anode slime (copper anode slime includes the following mass percentage components: 13.42% copper, 8.55% selenium, 0.92% tellurium, 0.21% gold) according to the solid-liquid ratio of 1:8g / ml at a concentration of 110g / ml LH 2 SO 4 and F...

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PUM

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Abstract

The invention relates to a method for reducing gold in a chlorination selenium-dipping solution with a reducing agent, and belongs to the technical field of wet metallurgy. The method for reducing gold in chlorination selenium-dipping solution with the reducing agent comprises the steps of adding divalent ferric salt into the chlorination selenium-dipping solution, reducing for 30-90min at 60-80 DEG C, and filtering after reaction to obtain sediment residue and chloride liquid, wherein the concentration of selenium ion in the chlorination selenium-dipping solution is 20-30g / L, 0.5-0.8g / L for tellurium ion and 0.3-0.5g / L for gold ion. According to the method, gold in the chlorination selenium-dipping solution is reduced by using ferrous sulfate as the reducing agent so as to prevent selenium and tellurium from being reduced from the chlorination selenium-dipping solution. The method has the advantages of low pollution, low production cost and good effect.

Description

technical field [0001] The invention relates to a method for reducing gold in a chlorinated selenium leach solution with a reducing agent, and belongs to the technical field of hydrometallurgy. Background technique [0002] Copper anode slime contains a large amount of valuable metals such as copper, selenium, tellurium, gold, silver, etc. Comprehensive recovery of valuable metals from copper anode slime has become an important metallurgical topic. At present, the comprehensive recovery processes of copper anode slime mainly include: pyrometallurgy, hydrometallurgy and combined separation and metallurgy. [0003] A large-scale domestic copper factory adopts a combined dressing and smelting method to treat copper anode slime. The treatment process is: sulfuric acid leaching for decopper-chlorination leaching for deselenium, tellurium-flotation of silver concentrate-silver concentrate pyromelting-precious metal refining, etc. In the chlorination leaching deselenium process, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B11/00C22B3/44
CPCY02P10/20
Inventor 王华王冲章尚发张邦琪胡建杭代红坤魏永刚祁先进舒波杨世莹杨坤彬李磊
Owner KUNMING UNIV OF SCI & TECH