摘要 为实现褐铁矿型红土镍矿的更大规模利用，本文通过烧结杯实验与热力学、烧结矿化学成分及矿物学特征等机理分析，研究了不同种类褐铁矿型红土镍矿烧结性能的差异。当褐铁矿型红土镍矿由高脉石型转变为低脉石型时，烧结矿转鼓强度和利用系数分别由45.87%和0.97 t m−2 h−1增至50.16%和1.05 t m−2 h−1，固体燃耗由140.52 kg/t降至131.3 kg/t，低脉石型褐铁矿型红土镍矿烧结性能更优。这主要是因为其MgO和Al2O3含量相对更低，烧结过程中有利于液相生成能力与流动性的改善，最终使得烧结矿微观结构相对更加紧密，孔隙率相对更低，复合铁酸钙生成量相对更多，铁尖晶石与液相间的粘结效果相对更好。此外，当这两种不同种类褐铁矿型红土镍矿配矿烧结时，烧结矿冶金性能和镍含量并不会恶化与减少。基于此，通过相关的烧结强化技术，实现褐铁矿红土镍矿更为广泛的利用，同时制备出质量更好的含镍烧结矿是完全可行的。
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.
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.
2023, Vol. 30 
