Cleaning of waste smelter slags and recovery of valuable metals by pressure oxidative leaching

Huge quantities of slag, a waste solid product of pyrometallurgical operations by the metals industry are dumped continuously around the world, posing a potential environmental threat due to entrained values of base metals and sulfur. High temperature pressure oxidative acid leaching of nickel smelt...

Full description

Saved in:
Bibliographic Details
Published in:Journal of hazardous materials 2008-04, Vol.152 (2), p.607-615
Main Authors: Li, Yunjiao, Perederiy, Ilya, Papangelakis, Vladimiros G.
Format: Article
Language:English
Subjects:
Acid leaching
Applied sciences
Base metal
Base metal recovery
Chemical engineering
Cleaning
Conservation of Natural Resources
Dissolution
Economics
Exact sciences and technology
Hematite
Industrial Waste
Iron
Iron and steel making
Leaching
Lithium
Metallurgy
Metals - isolation & purification
Nickel
Other industrial wastes. Sewage sludge
Overpressure
Oxidation-Reduction
Oxygen consumption
Pollution
Pressure oxidative leaching
Reactors
Recovery
Refuse Disposal - methods
Slags
Smelter slag
Smelters
Sulfur
Waste solids
Wastes
Zinc
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Huge quantities of slag, a waste solid product of pyrometallurgical operations by the metals industry are dumped continuously around the world, posing a potential environmental threat due to entrained values of base metals and sulfur. High temperature pressure oxidative acid leaching of nickel smelter slags was investigated as a process to facilitate slag cleaning and selective dissolution of base metals for economic recovery. Five key parameters, namely temperature, acid addition, oxygen overpressure, solids loading and particle size, were examined on the process performance. Base metal recoveries, acid and oxygen consumptions were accurately measured, and ferrous/ferric iron concentrations were also determined. A highly selective leaching of valuable metals with extractions of >99% for nickel and cobalt, >97% for copper, >91% for zinc and
ISSN:0304-3894
1873-3336
DOI:10.1016/j.jhazmat.2007.07.052