A Thermodynamic Study of the Reduction of a Limonitic Laterite Ore by Methane
| Autor: | W. Anthony, C. A. Pickles |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Technology
Materials science chemistry.chemical_element Chemicals: Manufacture use etc reduction 02 engineering and technology TP1-1185 engineering.material Methane 020501 mining & metallurgy Reduction (complexity) modelling chemistry.chemical_compound nickel thermodynamics limonitic Laterite General Materials Science Physical and Theoretical Chemistry nickeliferous methane Chemical technology Metallurgy TP200-248 Condensed Matter Physics Nickel 0205 materials engineering chemistry Mechanics of Materials laterite engineering |
| Zdroj: | High Temperature Materials and Processes, Vol 37, Iss 9-10, Pp 909-919 (2018) |
| ISSN: | 2191-0324 0334-6455 |
| Popis: | The recovery of nickel from the oxidic nickeliferous laterite ores is receiving increasing attention due to the difficulty of recovering this metal from the sulphide ore deposits. One possible solution is to selectively reduce the nickel oxide in the ore, which could then be upgraded by, for example, magnetic concentration. In this article, a thermodynamic study was performed on the reduction of a limonitic laterite ore by methane. Methane was selected as the reducing agent as it has a lower environmental impact than carbon due to the reduced carbon dioxide emissions. The effects of temperatures and methane additions on the nickel recovery and nickel grade were investigated. High recoveries of over 95 % were predicted, but the grades were limited to about 2.5 % due to the formation of magnetite. The thermodynamic simulations for reduction by methane were in agreement with the experimental results in the literature for other reducing agents, reflecting the fact that the nickel oxide in the limonitic ore is relatively unstable. Thus, high recoveries could be achieved irrespective of the reducing agent involved. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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