具有一定含量的金矿石不能用简单的氰化法进行提金时,则被归类于难选金矿石.其难选的主要原因是因为金呈超微细颗粒包裹在硫化物矿物中,如黄铁矿和碑黄铁矿.从这些价值不高的硫化物中有效地回收金存在一定的困难.这不仅包括从硫化物基质中解离金,也包括从稀氰化液中使其连续溶解的问题. A certain amount of gold ore, which can not be extracted by simple cyanidation, is classified as refractory gold ore, and the main reason for its difficulty is that ultrafine gold particles are trapped in sulfide minerals such as pyrite And stellite.The difficulties in recovering gold efficiently from these less valuable sulfides include not only the dissociation of gold from the sulfide matrix but also the problem of continuous dissolution from dilute cyanide .