Hydrometallurgy of Base and Precious Metals

贱金属和贵金属的湿法冶金 该提案概述了在与贱金属和贵金属的回收和加工有关的一些重要领域继续研究和开发的计划。 研究了从甲烷磺酸中提取铅的工艺条件. MSA对铅具有非常高的溶解度（室温下为1033 g/L），是处理铅的理想介质。 将研究氧化矿和硫化矿的浸出、浸出液的净化和从MSA中电解回收纯铅。 研究了锰、铁氧化物矿石在氨-碳酸铵体系中的还原浸出。 将研究用于还原处理含氧化锰结核的Kennecott Cuprion工艺化学，以调查从陆地锰矿石（含铜、镍、钴和银）中回收贱金属和贵金属的情况。 工艺化学也将扩展到红土镍矿的处理，目标是将褐铁矿化转化为碳酸亚铁，随后释放镍和钴。 本文研究了高温高压条件下铁沉淀的形成，以期为矿物浸出制备富硫酸铁溶液提供依据。 这种方法已经在老挝的一家铜加工厂应用。 在这项工作中，更深入地了解的形成和碱性沉淀物的回收将进行，以期开发新的应用在金属提取和回收。 将研究从二次源中回收和分离钒。

Hydrometallurgy of Base and Precious Metals This proposal outlines a program to continue research and development in a number of important areas related to recovery and processing of base and precious metals. The extraction and processing of lead in methane sulphonic acid (MSA) will be investigated. MSA has a very high solubility for lead (1033 g/L at room temperature) and is an ideal media for processing of lead. The leaching of oxide and sulphide ores, the purification of leach solutions and the electrowinning recovery of pure lead from MSA will be investigated. The reductive leaching of manganese and iron oxides ores in the ammonia-ammonium carbonate system will be investigated. The Kennecott Cuprion process chemistry for reductive treatment of manganese oxide containing nodules will be studied to investigate recovery of base and precious metals from terrestrial sources of manganese ores (containing copper, nickel, cobalt and silver). The process chemistry will also be extended to the treatment of nickel laterite ores with the goal of converting limonite mineralization to ferrous carbonate with subsequent liberation of nickel and cobalt. The formation of iron precipitates under high temperature and pressure conditions will be studied with a view to preparation of ferric sulfate rich solutions for mineral leaching. This approach has been developed for application at a copper processing plant in Laos. In this work, a deeper understanding of the formation and releaching of the basic precipitate will be undertaken with a view to development of new applications in metal extraction and recovery. The recovery and separation of vanadium from secondary sources will be investigated.