The pre-treatment of them before conventional cyanide leaching includes roast, chemical oxidation and biological oxidation.
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。
2
It showed from experiments that the best approach to the treatment of fine grained disseminated gold ore was hot press oxidation of flotation concentrate of pyrite followed by cyanide leaching.
试验结果表明：对含金黄铁矿精矿进行压热氧化—氰化浸出，是处理该微细粒浸染型金矿石较有效的方法。
3
This paper makes use the original system of pretreating refractory ore by hot-press oxidation to extract gold by cyanide process.