Behaviour of Silicon in Nickel Laterite by Carbothermic Reduction in Vacuum

被引:0
作者
Shi, Lei [1 ,3 ]
Qu, Tao [1 ,2 ]
Liu, Dachun [1 ,2 ]
Tian, Yang [1 ,2 ]
Yang, Bin [1 ,2 ]
Dai, Yongnian [1 ,2 ]
机构
[1] Kunming Univ Sci & Technol, Natl Engn Lab Vacuum Met, Kunming 650093, Peoples R China
[2] State Key Lab Complex Nonferrous Met Resources Cl, Kunming 650093, Peoples R China
[3] Kunming Univ Sci & Technol, Fac Met & Energy Engn, Kunming 650093, Peoples R China
来源
8TH INTERNATIONAL SYMPOSIUM ON HIGH-TEMPERATURE METALLURGICAL PROCESSING | 2017年
基金
美国国家科学基金会;
关键词
Nickel laterite; Vacuum metallurgy; Carbothermal reduction; Silicon behaviour; ORE;
D O I
10.1007/978-3-319-51340-9_51
中图分类号
TF [冶金工业];
学科分类号
0806 ;
摘要
The carbonthermal reduction of high Mg-Si nickel laterite was studied under vacuum. The effects of adding calcium oxide and the reducing agent on the reduction of silicon in residue were studied at pressures of 10-200 Pa and different temperatures, with varying proportions of carbon and CaO. The analysis of the residue was performed using X-ray diffraction and chemical composition analysis. The results show the following: At 1350 degrees C with a C/O ratio of 1.5:1, the recovery of Si reached a maximum 71.09%. Under these conditions, Si exists mainly in the forms of Fe3Si, Fe2Si, FeSi and SiC. The recovery of Si was above 80% when the temperature was 1450 degrees C, the C/O ratio 1:1, and 15% addition of CaO. When CaO addition was 22.61%, all of the solid phase was Ca2SiO4.
引用
收藏
页码:517 / 527
页数:11
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