| 2020 №03 (04) |
DOI of Article 10.37434/sem2020.03.05 |
2020 №03 (06) |
"Suchasna Elektrometallurgiya" (Electrometallurgy Today), 2020, #3, 35-42 pages
Physical and technical prerequisites for development of metallurgical plasmatrons
V.V. Stepanenko, I.V. Sheiko, D.M. Zhirov, T.I. Dubova, V.V. Barabash
E.O. Paton Electric Welding Institute of the NAS of Ukraine. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: office@paton.kiev.ua
Abstract
The paper considers the physical and technological aspects of creating arc plasmatrons designed to operate in metallurgical smelting units and furnaces. Based on analysis of literature sources, a classification of metallurgical plasmatrons by the principle of plasma gas heating to plasma state is proposed. According to this classification, all the metallurgical plasmatrons are divided into four groups: arc, induction, electron and fuel. It is shown how in each group gas is heated to a plasma state, and the influence of technological factors (gas flow rate and composition, operating current, etc.) on plasma temperature and its technological properties is described. The features of burning of alternating current plasma arcs are considered. The requirements that must be observed, when designing metallurgical plasmatrons, are formulated. Ref. 16, Tabl. 1, Fig. 9.
Keywords: electric arc; plasma arc; plasmatron, plasma temperature; working current, volt-ampere characteristic, temperature gradient, plasma gas Надійшла до редакції 16.03.2020
Received
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