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。
The finish of the hand is achieved by electroplating involving several stages: leaching, degreasing, pre-nickelplating and nickelplating, along with numerous rinses.
指针的表面电镀需经过下列几道工序：过滤、去油脂、预镀镍、镀镍，之间还穿插了数次清洗。
In this paper the application and recent developments of heap leaching technology abroad are pre sented, and the main technological and economic performances of heap leaching operations are listed.
本文简要介绍国外堆浸技术的应用情况和最近的进展，详细列举了部分堆浸矿山的技术经济指标。
Taking copper sulphide mineral as study objects, the studies of chalcopyrite heating and pressure pre-oxidation leaching process were conducted in acid system adding chloride.
以硫化铜矿物为研究对象，在添加氯盐的酸性体系中，开展了黄铜矿加温、加压预氧化浸出过程研究。
The phase and morphology of exhausted catalyst before and after microwave radiation-pre- treatment and leaching are characterized by XRD and SEM techniques.
采用X射线衍射（XRD）和扫描电子显微镜（SEM）对微波辐射预处理前后和浸出前后的物相及废催化剂形貌进行了表征。
The effect of pre-treatment of the asbestos tailings on the acid leaching reaction of asbestos tailings was studied.
本文就石棉尾矿的预处理对石棉尾矿与酸反应效果的影响进行了研究。
However, when the technology of bacterial pre-oxidation and cyanide leaching for flotation concentrate of gold is used, the leaching rate of 92.73% is reached.
对浮选金精矿采用细菌预氧化—氰化浸出工艺，金浸出率可达到92.73%。
The process is acid adding pre-leaching at normal pressure, pressurized oxygen leaching to leach out base metals and filtering separation to obtain solid noble metal concentrate.
其特征在于 采用常压加酸预浸、再加压氧浸出，将羰化合成残渣中的贱金属浸出，过滤分 离得到固体贵金属精矿。
The process is acid adding pre-leaching at normal pressure, pressurized oxygen leaching to leach out base metals and filtering separation to obtain solid noble metal concentrate.
其特征在于 采用常压加酸预浸、再加压氧浸出，将羰化合成残渣中的贱金属浸出，过滤分 离得到固体贵金属精矿。
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