Abstract
Traditional industrial pure iron can no longer meet the requirements of many core industries, such as aerospace, electronic information, and military industries. Thus, high-purity iron has attracted considerable interest. Pyrometallurgy, hydrometallurgy, and electrometallurgy provide extensive research platforms for purifying and developing novel processes for producing high-purity iron. In this paper, we review latest research advances in high-purity iron purification methods and production processes and summarize the merits of each purification method. Moreover, we propose a production process that ensures the production of high-purity iron while reducing carbon emissions. In this process, iron ore is leached using a hydrometallurgical process, high-purity iron is obtained by electrolysis from clean energy sources, such as photovoltaics and wind power, and the purity of iron is increased to over 5N with a pyrometallurgy process.
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