<div>
<p>The
electric arc furnace (EAF) is one of the most widely-used steelmaking process
recycling the scrap as the raw material. Electric arc furnace steelmaking is a material-dependent
and energy-consuming process. The electricity is utilized as the main heat
source to melt the scrap by the electric arc discharging from the graphite
electrodes. Since the plasma arc weld has the very
similar heat transfer mechanism and melting phenomenon comparing with the scrap
melting in EAF process, the model development for the free-burning arc, the
arc-metal heat transfer, and the metal melting will refer to the research of
plasma arc weld field and start with a relatively small scale. In this study, a
comprehensive computational dynamics (CFD) model was developed to predict the
heat transfer from the electric arc to the metal anode, which is composed of
the DC electric arc model, solidification and melting model, and the arc-metal
heat transfer model. The validation of the CFD models has been conducted
utilizing the experimental data and simulation results in other literature. The
commercial software, ANSYS FLUENT<sup>®</sup>, was employed with the
User-Defined Function scripts and the User-Defined Scalar to model the magnetic
field, comprehensive flow field, and high temperature field. Furthermore, the
parametric studies for the process of the anode melted by the plasma arc were
performed to investigate the effects of the arc current and the initial anode
temperature on the anode melting. The results reveal that the value of the arc
current has a positive correlation with the arc temperature and velocity but has
negative correlation with the penetration time of the anode. Meanwhile, with
the increase of anode initial temperature, the metal penetrate time will
decrease.</p>
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| Identifer | oai:union.ndltd.org:purdue.edu/oai:figshare.com:article/11356460 |
| Date | 12 December 2019 |
| Creators | Yu Wang (8114765) |
| Source Sets | Purdue University |
| Detected Language | English |
| Type | Text, Thesis |
| Rights | CC BY 4.0 |
| Relation | https://figshare.com/articles/NUMERICAL_MODELING_OF_THE_METAL_MELTING_UTILIZING_A_DC_ELECTRIC_ARC_PLASMA_FOR_ELECTRIC_ARC_FURNACE/11356460 |
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