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论文类型：期刊论文

发表时间：2012-04-01

发表刊物：PLASMA SCIENCE & TECHNOLOGY

收录刊物：SCIE、EI、Scopus

卷号：14

期号：4

页面范围：321-326

ISSN号：1009-0630

关键字：numerical simulation; DC electric arc furnace; arc plasma; temperature field; flow field

摘要：A three dimensional steady-state magnetohydrodynamic model is developed for the arc plasma in a DC submerged electric arc furnace for the production of fused MgO. The arc is generated in a small semi-enclosed space formed by the graphite electrode, the molten bath and unmelted raw materials. The model is first used to solve a similar problem in a steel making furnace, and the calculated results are found to be in good agreement with the published measurements. The behavior of arcs with different arc lengths is also studied in the furnace for MgO production. From the distribution of the arc pressure on the bath surface it is shown that the arc plasma impingement is large enough to cause a crater-like depression on the surface of the MgO bath. The circulation of the high temperature air under the electrode may enhance the arc efficiency, especially for a shorter arc.