Multi-index analysis of the melting process of laterite metallized pellet

Yun Wang; Rong Zhu; Kai-lu Tu; Guang-sheng Wei; Shao-yan Hu; Hong Li

doi:10.1007/s12613-018-1696-2

Volume 25 Issue 12

Dec. 2018

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文章导航 > 矿物冶金与材料学报（英文） > 2018 > 25(12): 1423-1430

Yun Wang, Rong Zhu, Kai-lu Tu, Guang-sheng Wei, Shao-yan Hu, and Hong Li, Multi-index analysis of the melting process of laterite metallized pellet, Int. J. Miner. Metall. Mater., 25(2018), No. 12, pp. 1423-1430. https://doi.org/10.1007/s12613-018-1696-2

Cite this article as:

Yun Wang, Rong Zhu, Kai-lu Tu, Guang-sheng Wei, Shao-yan Hu, and Hong Li, Multi-index analysis of the melting process of laterite metallized pellet, Int. J. Miner. Metall. Mater., 25(2018), No. 12, pp. 1423-1430. https://doi.org/10.1007/s12613-018-1696-2

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研究论文

Multi-index analysis of the melting process of laterite metallized pellet

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

通讯作者:
Rong Zhu E-mail: zhurongwy123@163.com

中文摘要

Herein, a multi-index analysis of the nickel content of an alloy, output rate of the alloy, nickel recovery rate, and iron recovery rate during the melting of laterite metallized pellets was performed. The thermodynamic reduction behavior of oxides such as NiO, FeO, Fe₃O₄, and Cr₂O₃ was studied using the FactSage software, which revealed that SiO₂ is not conducive to the reduction of iron oxides, whereas the addition of basic oxides such as CaO and MgO is beneficial for the reduction of iron oxides. On the basis of a comprehensive analysis to achieve greater nickel recovery and lower iron recovery rates, the optimum experimental parameters in the orthogonal experiment were A3B1C3 (t=30 min, C/O=0.4, R=1.2); the indicators w_Ni, φ_alloy, η_Ni, and η_Fe had values of 15.0wt%, 12.1%, 44.9%, and 96.4%, respectively. In single-factor experiments, increasing basicity (R) substantially improved the separation effect in the low-basicity range 0.5 ≤ R ≤ 0.8 but not in the high-basicity range 0.8 ≤ R ≤ 1.2. Similar results were obtained for the effect of the C/O ratio. Moreover, the recovery rate of nickel increased with increasing recovery rate of iron.

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Research Article

Multi-index analysis of the melting process of laterite metallized pellet

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Abstract

Abstract

Herein, a multi-index analysis of the nickel content of an alloy, output rate of the alloy, nickel recovery rate, and iron recovery rate during the melting of laterite metallized pellets was performed. The thermodynamic reduction behavior of oxides such as NiO, FeO, Fe₃O₄, and Cr₂O₃ was studied using the FactSage software, which revealed that SiO₂ is not conducive to the reduction of iron oxides, whereas the addition of basic oxides such as CaO and MgO is beneficial for the reduction of iron oxides. On the basis of a comprehensive analysis to achieve greater nickel recovery and lower iron recovery rates, the optimum experimental parameters in the orthogonal experiment were A3B1C3 (t=30 min, C/O=0.4, R=1.2); the indicators w_Ni, φ_alloy, η_Ni, and η_Fe had values of 15.0wt%, 12.1%, 44.9%, and 96.4%, respectively. In single-factor experiments, increasing basicity (R) substantially improved the separation effect in the low-basicity range 0.5 ≤ R ≤ 0.8 but not in the high-basicity range 0.8 ≤ R ≤ 1.2. Similar results were obtained for the effect of the C/O ratio. Moreover, the recovery rate of nickel increased with increasing recovery rate of iron.
- melting and separation;
- laterite metallized pellet;
- multi-index analysis;
- basicity;
- carbon-to-oxygen ratio

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Multi-index analysis of the melting process of laterite metallized pellet

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Multi-index analysis of the melting process of laterite metallized pellet

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