Effective and economical treatment of low-grade nickel laterite by a duplex process of direct reduction-magnetic separation & rotary kiln-electric furnace and its industrial application

2021 ◽  
Author(s):  
Hongyu Tian ◽  
Zhengqi Guo ◽  
Ruoning Zhan ◽  
Jian Pan ◽  
Deqing Zhu ◽  
...  
Keyword(s):  
Magnetic Separation ◽  
Electric Furnace ◽  
Rotary Kiln ◽  
Industrial Application ◽  
Direct Reduction ◽  
Low Grade ◽  
Nickel Laterite ◽  
Duplex Process

Direct Reduction Experiment on Low-Grade Limonite at JiangXi

2013 ◽  
Vol 734-737 ◽  
pp. 1029-1032 ◽  
Author(s):  
Jiang An Chen ◽  
Jun Liu
Keyword(s):  
Magnetic Separation ◽  
Direct Reduction ◽  
Influence Factors ◽  
Low Grade ◽  
Iron Concentrate ◽  
Reduction Experiment ◽  
Mesh Screen ◽  
Concentrate Grade ◽  
Roasting Time ◽  
Separation Conditions

Considered the properties of limonite ore at Jiangxi, the raw ore pressing ball - direct reduction - magnetic separation flowsheet have been adopted. the pressing ball conditions, the influence factors and the grinding magnetic separation conditions experiments were carried out. The results shown that: When the dosage of coal was 20%, water was 10%, CMC was 0.5%, pressing ball under the pressure of 190 kN, the calcination temperature was 1100 °C, the roasting time is 50 min, roasted ore were magnetic separated after grinded to 85% through 200 mesh screen. the iron concentrate grade of 92.48% and recovery rate of 93.45% were achieved finally.

Pilot scale test of producing nickel concentrate from low-grade saprolitic laterite by direct reduction-magnetic separation

2014 ◽  
Vol 21 (5) ◽  
pp. 1771-1777 ◽  
Author(s):  
Guo-lin Zheng ◽  
De-qing Zhu ◽  
Jian Pan ◽  
Qi-hou Li ◽  
Yue-ming An ◽  
...  
Keyword(s):  
Magnetic Separation ◽  
Direct Reduction ◽  
Pilot Scale ◽  
Low Grade ◽  
Nickel Concentrate ◽  
Scale Test ◽  
Pilot Scale Test

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.

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