某氧化型金矿石氰化浸出试验

摘要

某氧化型金矿石金含量高达7.76 g/t,但浮选工艺回收效果极不理想.采用分段浸出工艺对磨矿细度、氰化钠用量、浸出时间等重要工艺技术条件进行了研究,还对影响金浸出的铜离子进行了预处理研究.结果表明,浸前氨水预处理有利于削弱铜对金浸出的负面影响,在试验确定的最佳工艺技术条件下,金浸出率达到了90.11％,达到了工业生产要求.%An oxidized gold ore contains gold up to 7. 76 g/t,but the gold recovery is highly undesirable by adopting the flotation process. Tests on the technical conditions of grinding fineness, sodium cyanide consumption, leaching time through segment leaching process are carried out,by which Cu ions that affects the gold leaching are pre-treated. The test results show that the ammonia pretreatment before leaching is conductive to weaken the negative impact of copper on gold leaching. Under the optimum conditions obtained from the above tests,gold leaching rate reaches 90. 11% .which can meet the requirements of industrial production.