Test Results and Development of a Technology of Gold-copper Ore Cyanidation
The paper presents the results of research on the development of gold recovery technology from oxidized gold-copper ore of one of deposits in Russian Federation. Gold and copper grades in the ore are 9.5 g/t and 0.4%, respectively. Various options of flowsheets, such as direct cyanidation,thiourea leaching, flotation and gravity concentration followed by subsequent cyanidation of concentration products, were tested. It was established that gravity-cyanidation technology with filtration leaching tails and the use of solutions in the recirculation is the optimal option for ore treatment.The proposed flowsheet provides gold recovery for 91.0% at NaCN consumption 2.5 kg/t according to the results of pilot testing.Ammonia-cyanide gold leaching was also examined. In comparison with cyanidation, gold leaching solution in system NaCN-NH4OH-(NH4)2CO3 allows NaCN consumption to be reduced three times from 4.5 kg to 1.5 kg per 1 ton of the ore and provides the same gold recovery.Based on the laboratory and pilot plant tests results of gravity-cyanidation technology of gold dissolution, process design criteria were developed.
Pyrite cinders Gold Silver Copper Zinc Water washing Extraction Cyanidation Cementation Recovery
Olga D. Khmelnitskaya Vasily M. Lodeischikov Zinaida A. Marinyuk Grigory I. Voiloshnikov
IRGIREDMET, Russia
国际会议
XXIV International Mineral Processing Congress(第24届国际矿物加工大会)
北京
英文
1704-1709
2008-09-24（万方平台首次上网日期，不代表论文的发表时间）