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前言许多湿法冶金过程利用氧化反应。通常采用的氧化剂有氧或空气、高铁离子、氯酸钠和二氧化锰;近年来还采用过氧化氢作为氧化剂。浸出含金属硫化物的物料(氨浸镍矿石或镍锍)时,可用加压下的氧作氧化剂,加压下的氧也可用来将亚铁离子氧化成高铁离子,后者氧化硫化物。在需氧细菌的作用下,可大大加速亚铁离子的氧化。在浸出铀矿石时,采用氯酸钠或二氧化锰(常用软锰矿)氧化含四价铀的矿物,但不是由氯酸钠或二氧化锰直接进行
Introduction Many hydrometallurgical processes utilize oxidation reactions. Oxidants commonly used in the aerobic or air, high-iron ions, sodium chlorate and manganese dioxide; hydrogen peroxide has also been used in recent years as an oxidant. When leaching a metal sulphide-bearing material (ammonia-leached nickel ore or nickel matte), oxygen under pressure may be used as an oxidizer, and oxygen under pressure may also be used to oxidize ferrous ions to ferric ions which oxidize the sulphide. The role of aerobic bacteria, can greatly accelerate the oxidation of ferrous ions. Uranium ore leaching, the use of sodium chlorate or manganese dioxide (commonly used pyrolusite) oxidation of tetravalent uranium-containing minerals, but not directly from the sodium chlorate or manganese dioxide