Hydrometallurgy of Base and Precious Metals

贱金属和贵金属湿法冶金 该提案概述了继续在与贱金属和贵金属的回收和加工有关的一些重要领域进行研究和开发的计划。 研究了甲烷磺酸(MSA)中铅的提取和加工。MSA对铅有很高的溶解度(室温下为1033g/L)，是处理铅的理想介质。研究了氧化矿石和硫化矿石的浸出、浸出液的净化以及从MSA中电积回收纯铅。 对氨水-碳酸铵体系还原浸出锰铁矿进行了研究。为研究从陆地来源的锰矿(含铜、镍、钴和银)中回收贱金属和贵金属，将研究用于还原处理含锰结核的Kenneott Cuprion过程化学。过程化学还将扩展到处理红土镍矿，目标是将褐铁矿矿化转化为碳酸亚铁，随后释放镍和钴。 研究高温高压条件下铁沉淀的形成，以期制备富含铁的硫酸铁溶液用于矿物浸出。这种方法已被开发用于老挝的一家铜加工厂。在这项工作中，将对碱性沉淀物的形成和释放有更深入的了解，以期在金属提取和回收方面开发新的应用。 将研究从二次源中回收和分离钒的问题。

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.