铁捕集富集料中铂族金属的深度富集技术

铁捕集法从二次资源中回收铂族金属的工艺已经得到了工业化应用，捕集过程在电炉或等离子炉中进行。等离子炉熔炼富集物硅含量高，导致其结构致密、惰性、耐腐蚀，需要先除硅才能获得高的溶解率，除硅技术主要有碱融溶-浸出法、氧化分离法等；电炉熔炼富集物硬度极高、难以破碎，工艺上采用高压雾化-酸溶、碎化-酸溶、电解等工艺进行深度富集。本文综述了含铂族金属铁合金深度富集技术的研究现状，并对主要技术存在的优缺点进行了评述。随着各行业对铂族金属需求量的增加，对铂族金属回收率的要求将越来越高，因此，还需进一步完善铂族金属回收技术，提高铂族金属回收率。

Deep enrichment technology of platinum group metals in iron collector

The process of iron trapping has been used in industry to recover platinum group metals from secondary resources, and the trapping process is carried out in electric furnace or plasma furnace. The concentrates obtained from plasma melting have high concentrations of silicon, leading to the formation of dense, inert and corrosion- resistant iron alloy. It is necessary to remove silicon first to facilitate the following dissolution process. The main silicon removal technologies include alkali melt solution-leaching method and oxidation-separation method. The enrichment material produced from electric furnace smelting has high hardness and is difficult to be broken, and high pressure atomizatio -acid dissolution, fragmentation - acid dissolution, electrolysis or other processes are adopted for deep enrichment. In this paper, the research status of deep enrichment technology of platinum group metal-containing ferroalloy has been reviewed, focusing on the comparison in the advantages and disadvantages of the main technologies. With the increasing demand for platinum group metals in various industries, greater recovery rate will be required. Therefore, it is important to further improve the present recovery technology.