Preparation of Ferronickel from Nickel Laterite Ore via Semi-molten Reduction Followed by Magnetic Separation

2018 ◽  
pp. 913-920 ◽  
Author(s):  
Xueming Lv ◽  
Lunwei Wang ◽  
Zhixiong You ◽  
Jie Dang ◽  
Xuewei Lv ◽  
...  
Keyword(s):  
Magnetic Separation ◽  
Nickel Laterite ◽  
Nickel Laterite Ore ◽  
Laterite Ore

Experimental Study on Reduction-Magnetic Separation Process of Low-grade Nickel Laterite Ore

Ni-Co 2013 ◽  
2013 ◽  
pp. 221-229
Author(s):  
Chen Fa-tao ◽  
Zhang Bo ◽  
Li Wen-cai ◽  
Wang Qiang ◽  
Hong Xin
Keyword(s):  
Experimental Study ◽  
Magnetic Separation ◽  
Separation Process ◽  
Low Grade ◽  
Nickel Laterite ◽  
Nickel Laterite Ore ◽  
Laterite Ore

Experimental Study on Reduction-Magnetic Separation Process of Low-Grade Nickel Laterite Ore

Ni-Co 2013 ◽  
2013 ◽  
pp. 221-229
Author(s):  
Chen Fa-tao ◽  
Zhang Bo ◽  
Li Wen-cai ◽  
Wang Qiang ◽  
Hong Xin
Keyword(s):  
Experimental Study ◽  
Magnetic Separation ◽  
Separation Process ◽  
Low Grade ◽  
Nickel Laterite ◽  
Nickel Laterite Ore ◽  
Laterite Ore

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

2021 ◽  
Vol 118 (4) ◽  
pp. 407
Author(s):  
Guihua Hang ◽  
Zhengliang Xue ◽  
Ying Jiang Wu ◽  
Bo Zhang
Keyword(s):  
Magnetic Separation ◽  
Average Particle Size ◽  
Reduction Process ◽  
Separation Process ◽  
The Self ◽  
Particle Aggregation ◽  
Average Particle ◽  
Nickel Laterite ◽  
Nickel Laterite Ore ◽  
Laterite Ore

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.

scholarly journals Production of Ferronickel Concentrate from Low-Grade Nickel Laterite Ore by Non-Melting Reduction Magnetic Separation Process

Metals ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 1340
Author(s):  
Guorui Qu ◽  
Shiwei Zhou ◽  
Huiyao Wang ◽  
Bo Li ◽  
Yonggang Wei
Keyword(s):  
Magnetic Separation ◽  
Separation Process ◽  
Phase Changes ◽  
Low Grade ◽  
Nickel Laterite ◽  
Nickel Laterite Ore ◽  
Roasting Temperature ◽  
Grinding Time ◽  
Optimal Reduction ◽  
Laterite Ore

The production of ferronickel concentrate from low-grade nickel laterite ore containing 1.31% nickel (Ni) was studied by the non-melting reduction magnetic separation process. The sodium chloride was used as additive and coal as a reductant. The effects of roasting temperature, roasting duration, reductant dosage, additive dosage, and grinding time on the grade and recovery were investigated. The optimal reduction conditions are a roasting temperature of 1250 °C, roasting duration of 80 min, reductant dosage of 10%, additive dosage of 5%, and a grinding time of 12 min. The grades of nickel and iron are improved from 2.13% and 51.12% to 8.15% and 64.28%, and the recovery of nickel is improved from 75.40% to 97.76%. The research results show that the additive in favor of the phase changes from lizardite phase to forsterite phase. The additive promotes agglomeration and separation of nickel and iron.

Ferronickel enrichment by fine particle reduction and magnetic separation from nickel laterite ore

2014 ◽  
Vol 21 (10) ◽  
pp. 955-961 ◽  
Author(s):  
Xiao-hui Tang ◽  
Run-zao Liu ◽  
Li Yao ◽  
Zhi-jun Ji ◽  
Yan-ting Zhang ◽  
...  
Keyword(s):  
Magnetic Separation ◽  
Fine Particle ◽  
Nickel Laterite ◽  
Nickel Laterite Ore ◽  
Laterite Ore

scholarly journals Mechanism of Calcium Sulphate on the Aggregation and Growth of Ferronickel Particles in the self-Reduction of Saprolitic Nickel Laterite Ore

Metals ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 423
Author(s):  
Guihua Hang ◽  
Zhengliang Xue ◽  
Jinghui Wang ◽  
Yingjiang Wu
Keyword(s):  
Magnetic Separation ◽  
Calcium Oxide ◽  
Reduction Process ◽  
Calcium Sulphate ◽  
The Self ◽  
Nickel Laterite ◽  
Fine Grinding ◽  
Nickel Laterite Ore ◽  
Mineral Structure ◽  
Laterite Ore

Saprolitic nickel laterite is characterized by relatively low iron and nickel contents. Iron and nickel oxides are reduced to form fine ferronickel particles that disperse and embed in silicates in the reduction process, limiting the application of magnetic separation to extract ferronickel. Additives are applied to promote the aggregation and growth of ferronickel particles, then the large ferronickel particles will be separated by fine grinding and recovered via magnetic separation. Calcium sulphate is considered to be capable of increasing the size of ferronickel particles considerably. Due to the decomposition of calcium sulphate in the reduction process, the mechanism of calcium sulphate on the aggregation and growth of ferronickel particles should be conducted studied in-depth. The current work explores the effects of calcium sulphate, elemental sulphur, and calcium oxide on the formation of ferronickel particles in a saprolitic nickel laterite ore. The results showed that the formation of an Fe-FeS eutectic and the mineral structure transformation contributed by calcium oxide were all conducive to the mass transfer of ferronickel particles in gangue, ferronickel particles aggregated and grew up at the boundary between the hole and the gangue. The self-reduction, fine grinding, and magnetic separation of nickel laterite ore in the presence of three types of additive were examined. Nickel laterite ore with 7.88 wt% coal, 12 wt% calcium sulphate reduced at 1200 °C for 30 min, a ferronickel concentrate of Ni 8.08 wt%, and Fe 79.98 wt% was obtained at a nickel and iron recovery of 92.6% and 79.9%, respectively.

Biocatalytic and chemical leaching of a low-grade nickel laterite ore

2018 ◽  
Vol 115 (3) ◽  
pp. 305 ◽  
Author(s):  
Hasan Ciftci ◽  
Suleyman Atik ◽  
Fatma Gurbuz
Keyword(s):  
Sucrose Concentration ◽  
Low Grade ◽  
Optimum Conditions ◽  
Nickel Laterite ◽  
Chemical Leaching ◽  
Solid Ratio ◽  
Metals Recovery ◽  
Nickel Laterite Ore ◽  
The Difference ◽  
Laterite Ore

Nickel and cobalt recovery from a low-grade nickel laterite ore, supplied from Çaldağ deposit (Manisa, Turkey) were investigated by bio and chemical leaching processes. The fungus, Aspergillus niger was used for biocatalytic leaching experiments. The effects of parameters (solid ratio and sucrose concentration) on the biocatalytic leaching of the ore were initially tested in flasks to obtain the optimum conditions for the A. niger. Then chemical leaching was applied as a comparison to bioleaching, using organic acids (citric, oxalic, acetic and gluconic acids) as well as a mixture of acids. According the results, the maximum dissolution yield of nickel, cobalt and iron were detected respectively as 95.3%, 74.3% and 50.0% by biocatalytic processes which containing 25% (w/v) sucrose and 1% (w/v) solids. The increase in the solid ratio adversely influenced the biocatalytic activity of A. niger. Finally, further tests in reactors (v = 1 and 10 L) were performed using the optimum conditions from the flask tests. The difference in metals recovery between biocatalytic and chemical leaching was significantly important. Bioleaching produced higher Ni and Co extractions (34.3–75.6%) than chemical process.

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