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| Study on the reduction of silicon magnesium laterite nickel ore by methane under the action of sodium sulfide |
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Received:March 21, 2023
Revised:April 03, 2023
Accepted:April 13, 2023
Published Online:June 25, 2023
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| DOI： |
| KeyWord:Laterite nickel ore; Sodium sulfide; Reduction roasting; Ferronickel |
| Author | Institution |
| liufei |
Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology;State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology |
| libo |
Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology;State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology |
| weiyonggang |
Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology;State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology |
| wangxun |
Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology;State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology |
| zhoushiwei |
Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology;State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology |
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| Abstract: |
| Nickel is an important strategic metal. With the increasing scarcity of high-quality nickel sulfide ore, the resource-rich laterite nickel ore has become an important raw material for nickel extraction. Taking laterite nickel ore as the research object, methane as the reducing agent and sodium sulfide as the additive, the effects of reduction temperature, reduction time, methane concentration and additive dosage on the metallization rate of nickel and iron were studied, and the aggregation of nickel and iron in the reduction products was studied by scanning electron microscopy and energy dispersive spectroscopy (SEM-EDS). The results show that under the conditions of reduction temperature 900 ℃, methane concentration 20%, reduction time 60 min and sodium sulfide addition 10%, the metallization rate of nickel in the reduction product is 89.05, and the metallization rate of iron is 5.01%. The addition of sodium sulfide promotes the aggregation and growth of ferronickel particles, which is conducive to the separation of ferronickel particles and impurities.At the same time, the FeS generated inhibits the deep reduction of iron and realizes the selective reduction of nickel. |
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