Two-stage reduction for the preparation of ferronickel alloy from nickel laterite ore with low Co and high MgO contents

Yong-qiang Chen, Hong-liang Zhao, Cheng-yan Wang

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Yong-qiang Chen, Hong-liang Zhao, and Cheng-yan Wang, Two-stage reduction for the preparation of ferronickel alloy from nickel laterite ore with low Co and high MgO contents, Int. J. Miner. Metall. Mater., 24(2017), No. 5, pp.512-522. https://dx.doi.org/10.1007/s12613-017-1432-3
Yong-qiang Chen, Hong-liang Zhao, and Cheng-yan Wang, Two-stage reduction for the preparation of ferronickel alloy from nickel laterite ore with low Co and high MgO contents, Int. J. Miner. Metall. Mater., 24(2017), No. 5, pp.512-522. https://dx.doi.org/10.1007/s12613-017-1432-3
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研究论文 Open Access

Two-stage reduction for the preparation of ferronickel alloy from nickel laterite ore with low Co and high MgO contents

  • School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China

  • Key Lab of Rare & Precious Metals Green Recycling and Extraction, Beijing 100083, China

基金项目: 

This work was financially supported by the National Natural Science Foundation of China (Nos. U1302274 and 51274044).

    通信作者:

    Cheng-yan Wang E-mail: chywang@yeah.net

中文摘要

The preparation of ferronickel alloy from the nickel laterite ore with low Co and high MgO contents was studied by using a pre-reduction-smelting method. The effects of reduction time, calcination temperature, quantity of reductant and calcium oxide (CaO), and pellet diameter on the reduction ratio of Fe and on the pellet strength were investigated. The results show that, for a roasting temperature >800℃, a roasting time >30 min, 1.5wt% added anthracite coal, 5wt% added CaO, and a pellet size of~10 mm, the reduction ratio of Fe exceeds 70% and the compressive strength of the pellets exceeds 10 kg per pellet. Reduction smelting experiments were performed by varying the smelting time, temperature, quantity of reductant and CaO, and reduction ratio of Fe in the pellets. Optimal conditions for the reduction smelting process are as follows:smelting time, 30-45 min; smelting temperature, 1550℃; quantity of reductant, 4wt%-5wt%; and quantity of CaO, 5wt%; leading to an Fe reduction ratio of 75% in the pellets. In addition, the mineral composition of the raw ore and that during the reduction process were investigated by process mineralogy.

 

Research Article Open Access

Two-stage reduction for the preparation of ferronickel alloy from nickel laterite ore with low Co and high MgO contents

Author Affilications

    • School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China

    • Key Lab of Rare & Precious Metals Green Recycling and Extraction, Beijing 100083, China

  • Funds: 

    This work was financially supported by the National Natural Science Foundation of China (Nos. U1302274 and 51274044).

  • Received: 05 December 2016; Revised: 11 January 2017; Accepted: 12 January 2017;
The preparation of ferronickel alloy from the nickel laterite ore with low Co and high MgO contents was studied by using a pre-reduction-smelting method. The effects of reduction time, calcination temperature, quantity of reductant and calcium oxide (CaO), and pellet diameter on the reduction ratio of Fe and on the pellet strength were investigated. The results show that, for a roasting temperature >800℃, a roasting time >30 min, 1.5wt% added anthracite coal, 5wt% added CaO, and a pellet size of~10 mm, the reduction ratio of Fe exceeds 70% and the compressive strength of the pellets exceeds 10 kg per pellet. Reduction smelting experiments were performed by varying the smelting time, temperature, quantity of reductant and CaO, and reduction ratio of Fe in the pellets. Optimal conditions for the reduction smelting process are as follows:smelting time, 30-45 min; smelting temperature, 1550℃; quantity of reductant, 4wt%-5wt%; and quantity of CaO, 5wt%; leading to an Fe reduction ratio of 75% in the pellets. In addition, the mineral composition of the raw ore and that during the reduction process were investigated by process mineralogy.

 

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Jiancheng Yu, Baozhong Ma, Longfei Shi, et al. Collaborative extraction of valuable components from saprolitic laterite ore through two-stage nitric acid leaching. Journal of Industrial and Engineering Chemistry, 2024, 138: 311. 必应学术
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Y Sari, A Manaf, W Astuti, et al. Recovery of ferronickel by green selective reduction of nickel laterite. IOP Conference Series: Earth and Environmental Science, 2024, 1388(1): 012026. 必应学术
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