TY - JOUR AU - Duong, Ngoc Binh AU - Vu, Quyen AU - Vu, Trang AU - Doan, Cuong AU - Tran, Huy PY - 2021/09/13 Y2 - 2024/03/29 TI - SILICOTHERMIC REDUCTION OF THANHHOA DOLOMITE: THERMODYNAMIC AND EXPERIMENTAL JF - Acta Metallurgica Slovaca JA - Acta Metall Slovaca VL - 27 IS - 3 SE - Research papers DO - 10.36547/ams.27.3.948 UR - https://journals.scicell.org/index.php/AMS/article/view/948 SP - 109-113 AB - <p>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%.</p> ER -