Effect of CaF2 on the aggregation and growth of ferronickel particles in the self-reduction of Nickel laterite ore

IF 1.1 4区材料科学 Q3 METALLURGY & METALLURGICAL ENGINEERING

Metallurgical Research & Technology Pub Date : 2021-01-01 DOI:10.1051/metal/2021050

G. Hang, Z. Xue, Yingjiang Wu, Bo Zhang

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引用次数: 3

Abstract

Increasing attention is being paid to the self-reduction and magnetic separation of nickel laterite ore because of economic and efficiency advantages. The aggregation and growth of ferronickel particles during the reduction process is an important factor for subsequent magnetic separation. In this study, the effect of CaF2 on ferronickel particle aggregation and growth during the self-reduction of nickel laterite ore was investigated by visual data analysis of ferronickel particles. The recovery and grade of Ni and Fe from the self-reduction, fine grinding, and magnetic separation of nickel laterite ore under the strengthening action of CaF2 were measured. Increasing CaF2 addition yielded a significant increase in the average particle size of ferronickel particles and an increased recovery of a higher grade of Ni. A ferronickel concentrate with 7.1 wt% Ni and 68.5 wt% Fe was obtained at a Ni recovery of 84.14% in the presence of 8 wt% CaF2. CaF2 accelerates the aggregation and growth of ferronickel particles, which promotes the separation of the ferronickel alloy from the gangue in the magnetic separation process.

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CaF2对红土镍矿自还原过程中镍铁颗粒聚集生长的影响

红土镍矿的自还原磁选因其经济和效率的优势而日益受到人们的重视。铁镍颗粒在还原过程中的聚集和生长是后续磁分离的重要因素。通过对镍铁颗粒的可视化数据分析，研究了CaF2对红土镍矿自还原过程中镍铁颗粒聚集和生长的影响。对红土镍矿在CaF2强化作用下的自还原、细磨、磁选过程中Ni、Fe的回收率和品位进行了测定。增加CaF2的添加量可以显著提高镍铁颗粒的平均粒径，并提高较高品位镍的回收率。在8 wt% CaF2存在下，获得了镍含量为7.1 wt%、铁含量为68.5 wt%、镍回收率为84.14%的镍铁精矿。CaF2加速了铁镍颗粒的聚集和生长，促进了铁镍合金在磁选过程中与脉石的分离。

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来源期刊

Metallurgical Research & Technology METALLURGY & METALLURGICAL ENGINEERING-

CiteScore

1.70

自引率

9.10%

发文量

审稿时长

4.4 months

期刊介绍： Metallurgical Research and Technology (MRT) is a peer-reviewed bi-monthly journal publishing original high-quality research papers in areas ranging from process metallurgy to metal product properties and applications of ferrous and non-ferrous metals and alloys, including light-metals. It covers also the materials involved in the metal processing as ores, refractories and slags. The journal is listed in the citation index Web of Science and has an Impact Factor. It is highly concerned by the technological innovation as a support of the metallurgical industry at a time when it has to tackle severe challenges like energy, raw materials, sustainability, environment... Strengthening and enhancing the dialogue between science and industry is at the heart of the scope of MRT. This is why it welcomes manuscripts focusing on industrial practice, as well as basic metallurgical knowledge or review articles.