About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Characterization of Minerals, Metals and Materials 2022
|
Presentation Title |
Characterization of Slag and Growth of Ferronickel Grains during Smelting of Nickel Laterite Ore |
Author(s) |
Donglai Ma, Jianbo Zhao, Hanghang Zhou, Zhixiong You |
On-Site Speaker (Planned) |
Donglai Ma |
Abstract Scope |
The aggregation of ferronickel particles and separation of metal fraction from slag fraction are pivotal during the pyrometallurgical smelting nickel laterite ore. Thus, many measures were adopted to regulate the properties of slag and metal fractions. In this study, Na2S, Na2CO3 and FeO were used to regulate the properties of a basic slag (64 wt.% SiO2–9 wt.% Al2O3–3 wt.% CaO–24 wt.% MgO). The liquid phase content, melting temperature as well as viscosity of different slag compositions were determined from the view of thermodynamics. Then, the aggregation behaviors of ferronickel particles in the presence of different additives were investigated. The experimental results indicated that the average diameter of ferronickel particles increased from <10 μm to larger than 35 μm when 3.3% Na2S was added, comparing to an average diameter less than 30 μm by adding the other two additives. The effect of Na2S was proved to be the most efficient. |
Proceedings Inclusion? |
Planned: |
Keywords |
Iron and Steel, Pyrometallurgy, Extraction and Processing |