我国镁冶金工业自1998 年以来，连续13 年原镁产量和出口居世界第一，占世界原 镁产量的80%以上，98%的原镁生产采用皮江法，但传统皮江法炼镁存在热利用效率低、 单罐装料量低、还原罐产能低、能耗高、成本高、污染严重等共性技术难题。因此，迫 切需要研发新的炼镁技术，攻克上述技术难题，降低炼镁成本，使我国从炼镁大国转变 为炼镁强国。 论文对多热源内热式电热法真空炼镁技术的热力学、动力学进行了理论分析，建立 了动力学数学模型，确定了反应表观活化能。 论文分析了多热源内热式电热法炼镁方法的传热规律，采用大型工程模拟软件 ANSYS 对不同功率及不同冶炼时间条件下冶炼炉内温度场的分布进行了分析。开展了 镁冷凝过程的热力学和动力学研究，对炉内结构与冷凝器温度场分布之间的关系进行了 模拟分析。实验表明，当冷凝器下部的辐射板与发热体平面夹角为30°，冷凝器上部的 辐射板与炉顶夹角为90°，发热体上部辐射板与炉顶的夹角为90°，抽气量为0.7m3/s 时最有利于镁的冷凝。 设计制造了多热源内热式电热法冶炼金属镁中试试验炉。新型中试炉具有以下特 点：（1）改传统镁冶炼的外部加热为内部加热；（2）改传统的卧罐式还原为立炉式还原； （3）用电加热替代传统的煤或气加热；（4）可实现自动进卸料，提高了热利用效率和 生产效率。实验研究表明，中试炉内温度可以达到1300℃以上，压力在反应阶段可以保持在6Pa 以下，镁晶体可以顺利的结晶到冷凝器内。 实验确定了中试炉的生产工艺参数，在功率50kw，反应温度1200~1300℃，真空度 10Pa 以内保温4h 便可达到最佳效果。在此实验条件下，料镁比可以达到5.88，镁还原 率88%以上，吨镁能耗8820 kW·h，得到结晶状态较好的呈树枝状生长在冷凝面上的固 态冷凝镁，冷凝物中金属镁的纯度最高可以达到99%以上，达到国内最先进水平。

Since 1998, the production and output of the crude magnesium from the domestic magnesium metallurgy industry have stood the top one in the world for thirteen years, which possesses 80% of the global production.While 98% of the production of the crude magnesium is still obtained by Pidgeon process,but it has defect of popular technical problem:low heat utilization efficiency,high energy consumption and cost, pollution environment. Consequently, the development and researeh of new internally heated magnesium extraetion teehnology.Conquer the above technical problems,can reduee operating cost advance engineering level and materialize the dream of a magnesium production power. This thesis has analysis the thermodynamics and kinetics theory of Inner-multi- thermal -source Electric Heating Magnesium Smelting Furnace. The kinetic mathematic model was proposed,and identify the apparent activation energy of the technology. This thesis has analysis the fundamental research included thermodynamics and heat transfer research on new process. Simulation temperature distribution rule in the difference of the power and the difference of the time by ANSYS soft,and Analysis the thermodynamics and kinetics theory of magnesium.Simulation condenser tempertature distribution rule in the difference of the Furnace structure.The tests show, when the radiant panel in the lower part of condenser and heating element of 300 plane angle, the radiant panel in the top part ofcondenser and roof of 900 plane angle, the radiant panel in the top part of heating element and roof of 900 plane angle,and exhaust volume of 0.7m3/s, most conducive to the crystallization of magnesium. Designing & manufacturing Inner-multi- thermal -source Electric Heating Magnesium Smelting Furnace.The new vacuum metallurgical furnace are shown as follow: (1)Shiftexternal heating to inside heating; (2)Shift The horizontal retort to shaft furnace; (3)Shift Coal heating or gas heating to electrical heating;(4)Can automatic feeding and discharging,increase utilization ratio of heat and productive. The experiment indicates the following conclusions. The temperature of the reactor can reach to 1300℃ and the pressure of the reaction can keep below 6Pa. The comparative perfect parameters of the reaction in the large size reactor are determined. The best technology parameters are determined, the outside temperature can reach to 1200～1300℃,the vacuum less than 10Pa,the holding time is 4 hours ,the proportion is 5.8, more than 88% reduction rate of magnesium it would draw 8820 kW·h/t Mg of energy consumption ,Mg Show dendritic crystallization and crystalline state better is in the experiments,the purity of Mg above 99%. Achieve the most advanced domestic level.