RECOVERING METALS FROM PICKLE LIQUOR

摘要

A process for recovering zinc from pickle liquor is disclosed. The process comprises: (i) passing the liquor to an iron recovery stage in which iron present in the liquor is separated from the liquor; (ii) passing the iron-depleted liquor to an electrolysis stage in which zinc present in the liquor is electro-recovered; and (iii) passing the zinc-depleted liquor to a separate acid regeneration stage in which the pickle liquor is regenerated. This allows for recovery of ferric oxide and zinc, both saleable products. When the regenerated acid is recycled to the galvanizing process, the present process approaches zero waste.