LOW ACIDITY, LOW SOLIDS PRESSURE OXIDATIVE LEACHING OF SULPHIDIC FEEDS
展开▼
机译:硫酸盐的低酸,低固体压氧化浸出
展开▼
页面导航
摘要
著录项
相似文献
摘要
Process for recovering one or both of copper and silver from a sulphidic feed containing iron, arsenic, copper and silver by pressure oxidizing an aqueous feed slurry of the sulphidic feed in a pressure vessel to form a liquid phase containing free sulphuric acid and aqueous copper sulphate, and to precipitate arsenic as solid iron arsenic compounds. The process includes operating the pressure vessel at a sufficiently low solids content to maintain a free acid level below 30 g/L in the liquid phase, and providing sufficient heat to maintain a temperature in the pressure vessel above 200 øC. Copper metal is recovered from the liquid phase and/or silver may be recovered from the solids by cyanide leaching without the need for a jarosite destruction step.
展开▼
机译:通过在压力容器中加压氧化硫化物进料的含水进料浆以形成含有游离硫酸和含水硫酸铜的液相,从含有铁,砷,铜和银的硫化进料中回收铜和银中的一种或两种的方法,并以固态铁砷化合物形式沉淀出砷。该方法包括以足够低的固体含量操作压力容器,以使液相中的游离酸水平保持在30 g / L以下;并提供足够的热量,以将压力容器中的温度保持在200°C以上。从液相中回收铜金属和/或可以通过氰化物浸出从固体中回收银,而无需黄钾铁矾破坏步骤。
展开▼