Hydrometallurgical process for waste materials of the zinc and steel industries
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United States of America
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Jan 30, 2025
app pub date -
Nov 15, 2022
filing date -
Nov 15, 2022
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Abstract
The present invention relates to a process for recovering zinc and iron products from zinc-containing waste materials obtained from the zinc or steel industry, or both, by first treating the waste material(s) with strong acid, to convert any zinc ferrites into leachable compounds, and then leaching the acid-treated material, neutralizing the acid of the leach solution, recovering zinc from the neutralized ferrous iron-containing solution, recovering iron from the thus obtained solution, and circulating at least a fraction of the raffinate solution obtained from the iron recovery back to the leaching step.
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