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

WANG Zhen (王振); WANG Ninghui (王宁会); LI Tie (李铁); CAO Yong (曹勇)

doi:10.1088/1009-0630/14/4/10

Plasma Science and Technology > 2012 > 14(4): 321-326. > DOI: 10.1088/1009-0630/14/4/10

WANG Zhen (王振), WANG Ninghui (王宁会), LI Tie (李铁), CAO Yong (曹勇). 3D Numerical Analysis of the Arc Plasma Behavior in a Submerged DC Electric Arc Furnace for the Production of Fused MgO[J]. Plasma Science and Technology, 2012, 14(4): 321-326. DOI: 10.1088/1009-0630/14/4/10

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

Funds: supported by the National High Technology Research and Development Program of China (No. 2008AA03A325)

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Received Date: January 12, 2011

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Abstract

Abstract

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.
- numerical simulation,
- DC electric arc furnace,
- arc plasma,
- temperature field,
- flow field

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