Thermal Pre-treatment Techniques for Extraction of Nickel and Cobalt from Western Australia Saprolite Ores
Laterite deposits, holding 70% of global nickel resources, are economically challenging to process but are gaining interest. Traditional methods like high-pressure acid leaching (HPAL) face difficulties with saprolite ores due to high magnesium silicates. This research explores alternative methods:...
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| Format: | Thesis |
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Curtin University
2024
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| Online Access: | http://hdl.handle.net/20.500.11937/96384 |
| _version_ | 1848766145149009920 |
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| author | Pulgarin Saenz, John Alexander |
| author_facet | Pulgarin Saenz, John Alexander |
| author_sort | Pulgarin Saenz, John Alexander |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Laterite deposits, holding 70% of global nickel resources, are economically challenging to process but are gaining interest. Traditional methods like high-pressure acid leaching (HPAL) face difficulties with saprolite ores due to high magnesium silicates. This research explores alternative methods: non-reductive roasting followed by ammonia glycine leaching and reductive roasting to concentrate nickel and cobalt into a ferronickel phase. High goethite samples showed improved leachability, while magnesium silicate-rich samples required high-temperature reductive roasting with controlled CO2 flow and sodium chloride addition for optimal ferronickel recovery. FactSage® simulations highlighted discrepancies between predicted and experimental results due to kinetics and mass transfer constraints. |
| first_indexed | 2025-11-14T11:46:29Z |
| format | Thesis |
| id | curtin-20.500.11937-96384 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T11:46:29Z |
| publishDate | 2024 |
| publisher | Curtin University |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-963842024-11-20T05:29:01Z Thermal Pre-treatment Techniques for Extraction of Nickel and Cobalt from Western Australia Saprolite Ores Pulgarin Saenz, John Alexander Laterite deposits, holding 70% of global nickel resources, are economically challenging to process but are gaining interest. Traditional methods like high-pressure acid leaching (HPAL) face difficulties with saprolite ores due to high magnesium silicates. This research explores alternative methods: non-reductive roasting followed by ammonia glycine leaching and reductive roasting to concentrate nickel and cobalt into a ferronickel phase. High goethite samples showed improved leachability, while magnesium silicate-rich samples required high-temperature reductive roasting with controlled CO2 flow and sodium chloride addition for optimal ferronickel recovery. FactSage® simulations highlighted discrepancies between predicted and experimental results due to kinetics and mass transfer constraints. 2024 Thesis http://hdl.handle.net/20.500.11937/96384 Curtin University fulltext |
| spellingShingle | Pulgarin Saenz, John Alexander Thermal Pre-treatment Techniques for Extraction of Nickel and Cobalt from Western Australia Saprolite Ores |
| title | Thermal Pre-treatment Techniques for Extraction of Nickel and Cobalt from Western Australia Saprolite Ores |
| title_full | Thermal Pre-treatment Techniques for Extraction of Nickel and Cobalt from Western Australia Saprolite Ores |
| title_fullStr | Thermal Pre-treatment Techniques for Extraction of Nickel and Cobalt from Western Australia Saprolite Ores |
| title_full_unstemmed | Thermal Pre-treatment Techniques for Extraction of Nickel and Cobalt from Western Australia Saprolite Ores |
| title_short | Thermal Pre-treatment Techniques for Extraction of Nickel and Cobalt from Western Australia Saprolite Ores |
| title_sort | thermal pre-treatment techniques for extraction of nickel and cobalt from western australia saprolite ores |
| url | http://hdl.handle.net/20.500.11937/96384 |