FOERFARANDE FOER ATT MINSKA KONSUMTIONEN AV ZINK VID ELEKTROLYTISK RENING AV ZINK.

摘要

A neutral leach filtrate containing an oxidant selected from permanganate and manganate ions and mixtures thereof is treated with a reducing agent selected from ZnSO3, SO2 or mixtures thereof in amounts sufficient to substantially reduce all the manganese ions present (permanganate and/or manganate) to the divalent state and to provide a zinc sulfate solution having a predetermined pH. …Such a solution consumes appreciably less zinc in the known zinc dust purification or cementation step prior to zinc recovery by electrodeposition or like process.