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《Metal Mine》 2004-02
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Test Research of Gold Extraction by Cyanidation-leaching from A Copper-containing Gold Concentrate

Zhou Shijie Wang Chenggong Zhang Shumin(Northeastern University) Lu Changdong(Huolong Mining Co., Ltd)  
As copper could have serious effect on gold cyanidation-leaching process,copper containing concentrates were often sent to smelter for pyrometallurgical treatment and in-situ gold production from them was impossible, which greatly influenced the mine benefit.Therefore,tests were made on a Liaoning copper-containing gold concentrate,aiming at improving the gold leaching rate.The test results showed that the gold teaching rate was only 43.11% when the conventional method was used,and it could be raised by 7.11 percentage points when the concentrate was dereagented.When the dereagented concentrate was leached with ammonia-cyanide mixed solution at the best ammonia-to-sodium cyanide ratio of 5.92∶8,the gold leaching rate could be greatly increased to over 90%.If carbon-in-pulp method was used with ammonia-cyanide mixed solution,the leaching rate could further improved to over 93%.
【CateGory Index】: TD953
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