Towards understanding nickel converter matte solidification
Nickel converter mattes are complex metallurgical solutions of Ni, Cu, S, Fe and O along with low concentrations of many other elements including Co, Pb and PGEs. Studies on how such complex mixed solutions evolve upon cooling may contribute towards an improved understanding of matte solidification....
| Main Authors: | , , , , |
|---|---|
| Format: | Journal Article |
| Published: |
Elsevier
2013
|
| Subjects: | |
| Online Access: | http://hdl.handle.net/20.500.11937/8485 |
| _version_ | 1848745672261500928 |
|---|---|
| author | Thyse, E Akdogan, G. Taskinen, P. Viljoen, K Eksteen, Jacques |
| author_facet | Thyse, E Akdogan, G. Taskinen, P. Viljoen, K Eksteen, Jacques |
| author_sort | Thyse, E |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Nickel converter mattes are complex metallurgical solutions of Ni, Cu, S, Fe and O along with low concentrations of many other elements including Co, Pb and PGEs. Studies on how such complex mixed solutions evolve upon cooling may contribute towards an improved understanding of matte solidification. Liquidus and primary phase equilibria were calculated for Cu–Ni–S ternaries including fixed iron and cobalt concentrations. True liquid matte starting compositions and calculated assays were subsequently superimposed on relevant Cu–Ni–S_FeCo ternary systems. Multiphase cooling equilibria were also calculated for variable Cu–Ni–S–Fe–Co–O matte systems. In addition, actual industrial mattes were analysed using automated mineralogy, electron probe microanalysis and field emission scanning electron microscopy.The effect of the end composition of the ternary systems at fixed iron and cobalt concentrations on the liquidus temperature range has been quantified. The liquidus temperature range is lowered when the fixed iron and cobalt concentration decreases. The solidification pathway of oxygen-free liquid matte has been estimated. Moreover, it has been shown that variations in the starting composition of oxygen-free matte alter the path of solidification towards the eutectic. The examination of multiphase cooling equilibria for variable Cu–Ni–S–Fe–Co–O liquid phase systems provided a quantitative understanding of solidification processes to within ±2.5 °C. The analysed nickel and copper-sulphide phase structures have shown to exhibit chemical non-equilibrium within high and low iron matte. It can be concluded that the present study has provided a coherent insight into nickel converter matte solidification processes. |
| first_indexed | 2025-11-14T06:21:05Z |
| format | Journal Article |
| id | curtin-20.500.11937-8485 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T06:21:05Z |
| publishDate | 2013 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-84852017-09-13T14:35:06Z Towards understanding nickel converter matte solidification Thyse, E Akdogan, G. Taskinen, P. Viljoen, K Eksteen, Jacques Precious metal ores Sulphide ores Pyrometallurgy Nickel converter mattes are complex metallurgical solutions of Ni, Cu, S, Fe and O along with low concentrations of many other elements including Co, Pb and PGEs. Studies on how such complex mixed solutions evolve upon cooling may contribute towards an improved understanding of matte solidification. Liquidus and primary phase equilibria were calculated for Cu–Ni–S ternaries including fixed iron and cobalt concentrations. True liquid matte starting compositions and calculated assays were subsequently superimposed on relevant Cu–Ni–S_FeCo ternary systems. Multiphase cooling equilibria were also calculated for variable Cu–Ni–S–Fe–Co–O matte systems. In addition, actual industrial mattes were analysed using automated mineralogy, electron probe microanalysis and field emission scanning electron microscopy.The effect of the end composition of the ternary systems at fixed iron and cobalt concentrations on the liquidus temperature range has been quantified. The liquidus temperature range is lowered when the fixed iron and cobalt concentration decreases. The solidification pathway of oxygen-free liquid matte has been estimated. Moreover, it has been shown that variations in the starting composition of oxygen-free matte alter the path of solidification towards the eutectic. The examination of multiphase cooling equilibria for variable Cu–Ni–S–Fe–Co–O liquid phase systems provided a quantitative understanding of solidification processes to within ±2.5 °C. The analysed nickel and copper-sulphide phase structures have shown to exhibit chemical non-equilibrium within high and low iron matte. It can be concluded that the present study has provided a coherent insight into nickel converter matte solidification processes. 2013 Journal Article http://hdl.handle.net/20.500.11937/8485 10.1016/j.mineng.2013.03.023 Elsevier restricted |
| spellingShingle | Precious metal ores Sulphide ores Pyrometallurgy Thyse, E Akdogan, G. Taskinen, P. Viljoen, K Eksteen, Jacques Towards understanding nickel converter matte solidification |
| title | Towards understanding nickel converter matte solidification |
| title_full | Towards understanding nickel converter matte solidification |
| title_fullStr | Towards understanding nickel converter matte solidification |
| title_full_unstemmed | Towards understanding nickel converter matte solidification |
| title_short | Towards understanding nickel converter matte solidification |
| title_sort | towards understanding nickel converter matte solidification |
| topic | Precious metal ores Sulphide ores Pyrometallurgy |
| url | http://hdl.handle.net/20.500.11937/8485 |