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Plasma-driven Zinc Fuming from Industrial Process Residue

A very hot plasma gas is bubbled through a bath with molten fayalite slag to recover the zinc and lead of the slag via “deep fuming”, leading to a pure fayalite slag that can be further valorised as a building material. Plasma gas submerged in the liquid bath is studied to find the effect of plasma on the thermodynamics and kinetics of metal-fuming processes. The reaction rates and equilibria for the zinc-fuming reaction in a plasma reactor are investigated. This model is then validated in the world’s first large-scale operational plasma fumer. Process parameters are determined to achieve metal extraction at the lowest economic and ecological cost.

Date:31 Mar 2017  →  Today
Keywords:Metal Extraction, Fayalite Slag, Zinc, Plasma, Slag Fuming
Disciplines:Ceramic and glass materials, Materials science and engineering, Semiconductor materials, Other materials engineering
Project type:PhD project