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
Solution was given to treatment and reuse of cyanide-containing waste in the gas process.
针对造气含氰废水处理循环使用中存在的问题提出了解决方法。
3
The basic principle, choice and control of process condition of treatment of electroplating effluent containing cyanide by chlorine-alkali method are discussed.