Abstract
An initial test work was carried out to demonstrate that solution produced by autoclave acid leaching of Electric Arc Furnace Dust (EAFD) from the steel production could be processed through solvent extraction (SX) to recover zinc. Solvent extraction is a process for purification of the leach solution that extracts mainly zinc from other metallic impurities. To assess zinc extraction different counter-current extraction and strip configurations were tested. Extractant Di-2-ethylhexyl phosphoric acid (D2EHPA) and Shellsol D100 as a diluent were used in this investigation. The main operational parameters and the results obtained in the test work are presented in this paper. Well over 90% of the zinc was extracted from the pregnant leach solution using multi-stage SX circuit configuration and pH adjustment. Details of circuit configurations, phase disengagement times and crud generation are also shown.
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