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| Difference of sintering performance of different types of limonitic nickel laterite |
| Yu-xiao Xue1, Jian Pan1, De-qing Zhu1, Xin Wang1, Bo-hua Li1, Wei Liu1 |
| 1 School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, Hunan, China |
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Abstract To achieve the more extensive utilization of limonitic nickel laterite, the difference of sintering performance of different types of limonitic nickel laterite including high-gangue and low-gangue nickel ores was investigated by sinter pot tests and relevant mechanism analyses such as thermodynamic analysis and the chemistry and mineralogy of product sinter. With the type of limonitic nickel laterite transformed from high-gangue to low-gangue nickel ore, tumble index and productivity are improved from 45.87% and 0.97 t m-2 h-1 to 50.16% and 1.05 t m-2 h-1, respectively, and solid fuel rate is reduced from 140.52 to 131.13 kg/t, indicating that the low-gangue nickel ore possesses relatively better sintering performance. This is mainly due to the fact that the much lower contents of MgO and Al2O3 improve the formation ability and fluidity of liquid phase, which eventually contributes to the formation of relatively tighter sinter microstructure with the lower sinter porosity, more silico-ferrite of calcium and alumina amount and better bonding of hercynite by liquid phases. In addition, the metallurgical performance and nickel content of product sinter would not be reduced as different types of limonitic nickel laterite are blended for sintering. On this basis, it is entirely feasible to more widely utilize limonitic nickel laterite and simultaneously obtain much better-quality Ni-containing product sinter via effective sintering strengthening technologies.
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Received: 19 October 2021
Published: 25 January 2023
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| Cite this article: |
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Yu-xiao Xue,Jian Pan,De-qing Zhu, et al. Difference of sintering performance of different types of limonitic nickel laterite[J]. Journal of Iron and Steel Research International, 2023, 30(1): 21-30.
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2023, Vol. 30 
