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Steel making
ArticleName Increase of lining resistance of electric arc furnaces by improving the slag procedure with use of magnesium-containing materials
ArticleAuthor E. A. Shevchenko, A. N. Shapovalov, E. V. Bratkovskiy
ArticleAuthorData

Novotroitsk affiliate of the National University of Science and Technology (Novotroitsk, Russia):

E. A. Shevchenko, Cand. Eng., Associate Prof., Chair of metallurgical technologies and equipment, e-mail: ShevchenkoE.A@yandex.ru
A. N. Shapovalov, Cand. Eng., Associate Prof., Head of the Chair of metallurgical technologies and equipment
E. V. Bratkovskiy, Cand. Eng., Associate Prof., Chair of metallurgical technologies and equipment

Abstract

Steel production in electric arc furnaces is one of the most effective and promising methods of metal manufacture with preset chemical composition at present time. Increase of lining resistance by usage of the new high-quality refractories reduces the wear rate of the lining, however, it also requires large investments and does not allow to solve the problem of efficient lining operation in an electric arc furnace without proper selection of the rational parameters for the slag procedure. Therefore, the problem of selection of slag-forming materials is practically significant and very relevant. The paper contains the research materials carried out in the electric steelmaking shop of JSC «Ural Steel». The aim of the study was how to increase the resistance and service life of the lining in the electric arc furnaces via development of scientifically substantiated recommendations for improvement of the slag procedure during electric steel making. Experimental results of operation of the electric arc furnace No. 2 in the electric steelmaking shop of JSC "Ural Steel" have been analyzed during the pilot-industrial tests of magnesial slag-forming materials having fineness 10–50 mm with low (10–15%) and high (85–90%) MgO content. In the course of the conducted study, experimental data on the effect of magnesium-containing additives on lining resistance of the electric arc furnace were obtained. Recommendations for optimization of the slag forming procedure by selection of slag-forming materials were developed. Such materials can prolong the service life of lining and reduce the cost of steel production.
This work was financially supported by the Ministry of Education and Science of the Russian Federation for the project № 11.2054.2017/4.6 within the framework of the state task for 2017-2019.

keywords Electric arc furnaces, steel making, furnace lining, lining resistance, slag procedure, slag-forming materials, magnesium-containing additives, skull
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