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
Therefore, using microwave or ultrasonic treatment could obviously reduce the leaching time and improve leaching efficiency.
利用微波或超声波辅助处理，可以大幅度缩短浸提时间，提高浸提效率。
3
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.