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溶剂萃取法(SX)精炼铜产品的产量已占全球产量的20%以上。近年来该技术已变得越来普及。作为处理铜矿石和铜精矿的新的湿法冶金设计方案,在智利、美国等国家,该方案正在被评估或已经在过去的几年中付诸实施。萃取工厂具有低投入、低运营成本和操作简单、可生产高品质电解金属产品的特点,该类工厂设置在矿场附近,使得溶剂萃取工艺在中小规模生产中具有经济性、适应性和可行性,而这种规模不适于采用传统熔炼工艺。在某些情况下,选择得到高度纯盐类化合物可能比生产金属产品成本更低。由于商业上的成功,2003年以来年产15万t锌、专门处理原生和再生物料的纳米比亚Skorpion锌联合冶炼厂,目前正利用ZINCEX~(TM)溶剂萃取技术建设一个新的锌扩产项目。铜萃取和锌萃取是成熟和完善的商业技术。对于处理混合或多金属铜锌矿石和再生物料的新的采矿和冶金工程,现在正是考虑应用该技术的好时机。本论文提供了溶剂萃取技术在以下两个工业生产应用中的设计特点和技术优势:(1)氧化铜/锌多金属矿堆浸以回收高纯度阴极铜锌;(2)处理烟尘和铜熔炼炉的电收尘固体颗粒以回收铜锌并除去某些杂质,例如砷。在这两个项目中,该技术评估结果都是积极的,显示出依靠溶剂萃取技术回收这些金属具有明显的技术优势和潜在的经济效益。
Solvent extraction (SX) refined copper production accounts for more than 20% of global production. In recent years the technology has become more and more popular. As a new hydrometallurgical solution for copper and copper concentrates, the program is being evaluated or has been implemented in the past few years in countries such as Chile and the United States. Extraction plants are characterized by low input costs, low operating costs and ease of operation to produce high-quality electrolytic metal products. Such plants are located near the mine and make solvent extraction economically viable, adaptive and viable for small and medium-scale production , Which is not suitable for the traditional smelting process. In some cases, the choice of highly pure salt compounds may be cheaper than producing metal products. Due to commercial success, a joint zinc smelter in Skorpion, Namibia, which produces 150,000 t of zinc per year since 2003, is currently using ZINCEX ™ solvent extraction technology to build a new zinc expansion project. Copper extraction and zinc extraction are mature and well-established commercial technologies. It is now a good time to consider applying this technology to new mining and metallurgical projects that deal with mixed or polymetallic cupro-zinc ore and recycled materials. This paper presents the design features and technical advantages of solvent extraction technology in two industrial applications: (1) heap leaching copper oxide / zinc polymetallic ore to recover high purity copper and zinc cathodes; (2) treating soot and copper smelting The furnace’s electricity collects solid particles to recover the copper and zinc and remove some impurities, such as arsenic. In both projects, the results of this technical assessment are positive and show the obvious technical advantages and potential economic benefits of recovering these metals by solvent extraction.