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.
已确定二手烟的烟雾中含有超过7千种化学物质，其中至少250种是有害的，比如氰化氢、一氧化碳和氨。
Among the more than 7,000 chemicals that have been identified in secondhand tobacco smoke, at least 250 are known to be harmful, for example, hydrogen cyanide, carbon monoxide, and ammonia.
依据对氰化浸出矿浆的电化学分析，对氰化浸金进行了外加电场助浸试验。试验结果表明：外加电场有助于金在氰化矿浆中的浸出，能够提高金的浸出率。
Based on electrochemical analysis of cyanide leaching pulp, the experiment of applied electric field leaching aid for cyanide leaching of gold was made.
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