3D Numerical Analysis of the Arc Plasma Behavior in a Submerged DC Electric Arc Furnace for the Production of Fused MgO

被引：14
|
作者：
Wang Zhen [1 ]
Wang Ninghui [1 ]
Li Tie [1 ]
Cao Yong [1 ]
机构：
[1] Dalian Univ Technol, Sch Elect Engn, Dalian 116024, Peoples R China
来源：
PLASMA SCIENCE & TECHNOLOGY | 2012年 / 14卷 / 04期
基金：
国家高技术研究发展计划(863计划);
关键词：
numerical simulation; DC electric arc furnace; arc plasma; temperature field; flow field; HEAT-TRANSFER; FLUID-FLOW; BATH;
D O I：
10.1088/1009-0630/14/4/10
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
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.
引用
收藏
页码：321 / 326
页数：6
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