What are the methods to extract zinc from flue gas cleaning residue of Iron and Steel Plant?

Selvi Permandy Kandasamy @Selvi-Kandasamy

09 September 2019 1 4K Report

Methods that are available for extraction of Zinc from Flue gas cleaning residues, especially of Iron and Steel Sector. What are the success ratio and purity of zinc that are extracted?

Selvi Permandy Kandasamy

Using Hydrometallurgical process i.e. a method involving aqueous media for recovery of metals from concentrates/residual materials. The process is a continuous process and involves preparation of mother liquor by mixing Ammonium Chloride and Calcium Chloride in Water. The flue gas cleaning residue is mixed with mother liquor at a pH below 5.8 and H2O2 is added in the leaching tank to dissolve the metallic constituents like zinc oxide in the flue gas cleaning residue.

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