Tishchenko A. Melting of semi-product in electric arc furnaces with usage of metallized product which is reduced in roof's chamber

The object of investigation - the process of melting of semiproduct in a EAF with usage of iron-oxide materials. The aim of work - investigation and development of new technological variant of electric-arc melting of semiproduct. Research methods - mathematical and physical modeling of reduction process of iron-oxide pellets and their melting in liquid bath; the methods of mathematical statistics and means of computer facilities for processing experimental data were used. Apparatus - gas chromatograph ЛХМ-8МД, heating furnace KS-400/10, flux-melting furnace У-560. Theoretical results: the technology of melting of semiproduct in electrical arc furnaces with usage of metallized raw, which is reduced in the roof's chamber, was developed. Practical results: 1. The new technological process of electric arc melting was developed. 2. The construction of reduction roof's chamber of EAF was developed. 3. The construction is designed and produced the trial-industrial electric arc furnace EAF-0.2. The new approach lies in: 1. The conceptions according process of melting of semiproduct in EAF were obtained. 2. For the first time was obtained dependence between degree of metallization of oxide-coal pellets from angle of opening of gas dynamic distributor in roof's chamber and plate's rotation speed. 3. For the conditions of EAF with roof's chamber was obtained dependence between parameters of melting rate of reduced pellets, specific rate of their charging in the liquid bath and from the mass of metallic melt in the furnace. The degree of implementation: were realized the trial-industrial investigations of the technology of carbon laden semiproduct melting in the EAF-0.2. The results of work are included in the perspective plan of reconstruction of electro-melting workshop of the plant "Energomashspecstal" (Kramatorsk city).The field is metallurgical production.