在传统氰化浸出之前进行的预处理过程包括焙烧，化学氧化和生物氧化。
The pre-treatment of them before conventional cyanide leaching includes roast, chemical oxidation and biological oxidation.
贵州板其原生金矿石属碎屑岩类微细浸染型难选冶矿石，在氰化浸出之前需进行预处理。
Primary gold ore from Bangi, Guizhou, belongs to a clastic-type, finely disseminated, refractory particles. It is difficult to extract gold from the ore by cyanide infusing.
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