2014-Sustainable Industrial Processing Summit
SIPS 2014 Volume 4: Recycling & Secondary Battery
| Editors: | Kongoli F |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2014 |
| Pages: | 498 pages |
| ISBN: | 978-1-987820-06-5 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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EXPERIENCES ON LEACHING OF SECONDARY RAW MATERIALS FOR HYDROMETALLURGICAL RECOVERY OF VALUABLE METALS
Olof Forsen1; Jari Aromaa1;1AALTO UNIVERSITY, Espoo, Finland;
Type of Paper: Regular
Id Paper: 42
Topic: 5
Abstract:
The available raw material types for metals production are primary high-grade ores, primary low-grade ores and secondary raw materials. The treatment of primary raw materials is often easier than the treatment of secondary materials as the latter ones can have metals in combinations never found in nature.
The basic phenomena in treating primary and secondary materials are the same. Thermodynamics and reaction kinetics are the same when applied to pure metals or compounds. The differences are in the complexity of the raw material that has strong influence on selectivity. Leaching of complex low-grade materials and secondary materials can result in higher chemical and energy consumption. The solution purification after leaching complex low-grade and secondary materials can also be technically more difficult than when operating with primary high-grade materials. This is due to a higher number of metals in the solution.
Experiences on treatment of stainless steel flue dusts, spent automotive catalysts and superconductor scrap will be discussed.