Method of extracting and enriching gold (I) from cyaniding gold containing leaching solution
A cyanide leaching, extraction and enrichment technology, applied in the field of smelting technology, can solve the problems of difficult back extraction, low extraction efficiency and the like
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Embodiment 1
[0022] The hydrochloric acid solution with a concentration of 0.05mol / L and N235 were mixed and contacted in an equal volume ratio for 5 minutes, and then contacted with an equal volume of sodium bicarbonate solution with a concentration of 0.02mol / L. After equilibrium, the organic phase obtained was a modified amine Extracting agent.
[0023] Measure 1 part of modified amine extractant, 1 part of TRPO and 8 parts of kerosene in the extraction tank according to the volume ratio and mix evenly, add 30 parts of gold (I) with an initial concentration of 10.00 mg / L alkaline cyanide leaching gold liquid (feed liquid), stirred or oscillated for 10 minutes to achieve extraction equilibrium, left to stand for phase separation, the extraction rate was 96.31%, and the raffinate continued to be reused; then back-extracted with 10 parts of 0.05mol / L sodium hydroxide solution , the stripping rate reaches 91.5%, and the organic phase after stripping continues to be reused. A good enrichmen...
Embodiment 2
[0025] The sulfuric acid solution with a concentration of 0.02mol / L was mixed and contacted with an equal volume of N235 for 5 minutes, and then with an equal volume of a sodium bicarbonate solution with a concentration of 0.01mol / L. Amine extractant.
[0026] Measure 2 parts of modified amine extractant, 1 part of TRPO and 7 parts of kerosene in the extraction tank according to the volume ratio and mix them evenly, add 50 parts of gold (I) with an initial concentration of 5.44 mg / L of alkaline cyanide gold leaching liquid (feed liquid), stirred or oscillated for 10 minutes to reach extraction balance, left to stand for phase separation, the extraction rate was 96.17%, and the raffinate continued to be reused; then, react with 10 parts of 0.05mol / L sodium hydroxide solution The stripping rate reaches 90.01%, and the organic phase after stripping continues to be reused. A good enrichment effect of extraction and stripping has been obtained. At a lower initial concentration of...
Embodiment 3
[0028] The concentration is that the nitric acid solution of 1.0mol / L and N235 are mixed and contacted for 5 minutes in an equal volume ratio, and then the organic phase obtained after contacting and balancing the sodium bicarbonate solution with an equal volume concentration of 0.1 mol / L is the modified sex amine extractant.
[0029] In the same organic phase composition and volume as in Example 1, add 20 parts of gold (I) with an initial concentration of 21.74 mg / L of gold immersion precious liquid, after reaching the extraction balance, let stand to separate the phases, and measure and calculate the extraction rate 97.37%; then use 10 parts of 0.05mol / L sodium hydroxide for back extraction, the back extraction rate is 90.7%. At a higher initial concentration, good extraction and enrichment effects were also achieved.
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