Open AccessSILICOTHERMIC REDUCTION OF THANHHOA DOLOMITE: THERMODYNAMIC AND EXPERIMENTAL
Author(s) -
Binh Ngoc Duong,
Quyen Vu,
Trang tin tổng hợp nhất Công nghiệp dịch vụ,
Cuong Doan,
Tran Duc Huy
Publication year - 2021
Publication title -
acta metallurgica slovaca
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.277
H-Index - 13
eISSN - 1338-1156
pISSN - 1335-1532
DOI - 10.36547/ams.27.3.948
Subject(s) - ferrosilicon , dolomite , magnesium , metallurgy , reduction (mathematics) , materials science , thermodynamics , process (computing) , chemistry , alloy , physics , mathematics , geometry , computer science , operating system
Thermodynamic and experimental studies was carried out on the process of Thanhhoa dolomite reduction to produce magnesium. Thermodynamically studied on the effect of pressure and temperature on reduction was carried out together with verification experiment. Results show that at appropriate temperature and vacuum pressure, Thanhhoa dolomite can be reduced using ferrosilicon as the reductant. The higher level of vacuum, the lower temperature required for reduction. Thermodynamic calculation pointed out that at a vacuum pressure of 600 Pa, the reduction temperature could be as low as 1140 °C. Experiment results indicated that at although reduction could be done at 1150 °C, the process efficiency was low, generally below 20%. Process efficiency enhanced as temperature increase and reaches the highest value of 85,8% at 1250 °C (25 wt.% ferrosilicon). The amount of ferrosilicon used also has influenced the process efficiency. After three hours of reduction, the obtained magnesium was very high in purity, 99.3%.