|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||8th International Symposium on High Temperature Metallurgical Processing
||E-17: Behaviour of Silicon in Nickel Laterite by Carbothermic Reduction in Vacuum
||Lei Shi, Tao Qu, Dachun Liu, Yang Tian, Bin Yang, Yongnian Dai, Jian Wu
|On-Site Speaker (Planned)
The carbon thermal 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 system pressures of 10~200 Pa and different temperatures, the proportions of carbon and CaO were varied. The analysis of the residue was performed using X-ray diffraction and chemical composition analysis. The results show the following: at 1350 ℃ 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 ℃, the C/O ratio was 1:1, and the addition of CaO was more than 15%. When CaO was 22.61%, all of the solid phase was Ca2SiO4.
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