由于金以微粒状态包裹在硫化矿物(通常为黄铁矿和砷黄铁矿)里,用常规氰化法不易浸出其中的金。直到最近,硫化物经焙烧或加压氧化,接着氰化浸出仍是提取包裹金的唯一方法,但是,焙烧和加压浸出作业费用大。并且焙烧过程(尤其是砷黄铁矿) Gold is difficult to leach out of gold by conventional cyanidation because gold is encapsulated in sulphide minerals, usually pyrite and arsenopyrite. Until recently, sulphides have been roasted or pressurized for oxidation, followed by cyanidation and leaching, the only method of extracting gold encapsulated gold. However, roasting and pressure leaching operations are expensive. And the roasting process (especially arsenopyrite)