材料与冶金学报2026，Vol.25Issue(2)：137-143,7.DOI:10.14186/j.cnki.1671-6620.2026.02.005
菱镁石制氧化镁碳热还原等温动力学
Isothermal kinetics of carbothermal reduction of magnesium oxide from magnesite
摘要
Abstract
In order to promote the industrialization of magnesium preparation by carbothermal method,the isothermal reduction method was used to explore the isothermal carbothermal reaction mechanism of magnesium oxide prepared from magnesite.The effects of temperature and dough-making pressure on the reduction rate of magnesium oxide were systematically investigated,and the isothermal kinetic parameters and apparent activation energy of the carbothermal reaction were further calculated.The results show that 96.17％reduction could be realized by the briquetting reaction for 60 min at 1 773 K and 10 MPa dough-making pressure.In the temperature range of 1 623～1 773 K,the kinetics can be divided into two stages,namely 0～20 min and 30～60 min.Both phases are controlled by three-dimensional diffusion with apparent activation energies of 206.98 kJ/mol and 238.08 kJ/mol,respectively.关键词
氧化镁/碳热还原/反应动力学Key words
magnesium oxide/carbothermal reduction/reaction kinetics分类
矿业与冶金引用本文复制引用
孟庆龙,张宇,李金娜,庞云,庄艳歆,邢鹏飞..菱镁石制氧化镁碳热还原等温动力学[J].材料与冶金学报,2026,25(2):137-143,7.基金项目
国家自然科学基金面上项目(21978045). （21978045）
