Relationship Between Thermodynamic Modeling and Experimental Process for Optimization Ferro-Nickel Smelting

被引:0
|
作者
Urtnasan, Erdenebold [1 ,2 ]
Heo, Seong-Bong [3 ]
Yu, Joo-Won [4 ]
Jung, Chang-Ho [4 ]
Wang, Jei-Pil [4 ]
机构
[1] Pukyong Natl Univ, Ind Sci Technol Res Ctr, Busan 48513, South Korea
[2] Mongolian Univ Sci & Technol, Darkhan Sch Technol, Darkhan City 45051, Mongolia
[3] Hayang Univ, Dept Civil & Environm Engn, Seoul 04763, South Korea
[4] Pukyong Natl Univ, Sch Engn, Dept Met Engn, Busan 48513, South Korea
关键词
ferro-nickel; nickel laterite ore; olivine phase; M/S ratio; slag basicity; thermodynamic modeling; NICKEL LATERITE; SELECTIVE REDUCTION; ORE; SAPROLITE; IRON;
D O I
10.3390/min15020101
中图分类号
P3 [地球物理学]; P59 [地球化学];
学科分类号
0708 ; 070902 ;
摘要
Saprolite ores in nickel laterite deposits are pyrometallurgically processed to produce Fe-Ni alloy and Ni matte. The key to achieving the highest recovery degrees from nickel ore in electric arc furnaces and producing top-quality ferro-nickel alloys lies in maintaining optimal carbon consumption and carefully controlling the composition of the slag. This research work focused on finding the optimal smelting procedure for extracting ferro-nickel from calcined nickel ore. Comparing experimental data to the results of thermodynamic modeling using Factsage 8.2 software was a key part of the study. The nickel smelting process, which involved a carbon consumption of 4 wt.%, resulted in ferro-nickel with an Fe/Ni ratio of 4.89 and slag with a nickel content of just 0.017%. The structure and properties of nickel slag in the MgO-SiO2-FeO system were investigated by observing the changes in the MgO/SiO2 ratio. This study found a significant nickel recovery degree of 95.6% within the optimal M/S ratio range of 0.65 to 0.7. When the M/S ratio exceeds 0.7, iron-rich magnesium silicates (MgxFeySiO2+n) are generated within the slag. These compounds are released downwards due to their higher specific weight, restricting the movement of small metal particles and contributing to increased metal loss through the slag. Optimized slags could revolutionize smelting, increasing metal recovery while minimizing environmental impact.
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页数:24
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