Work number - P 3 FILED
Presented E.O.Paton Electric Welding Institute of the National Academy of Sciences of Ukraine.
Authors:
1. GONCHAROV Igor - Doctor of Technical Sciences, senior researcher, head of the "Materials for welding and electrometallurgy" department of the E.O.Paton Electric Welding Institute of the National Academy of Sciences of Ukraine;
2. RYMAR Serhiy – Doctor of Technical Sciences, leading researcher of the Department of Gas Discharge Physics and Electrothermia of the E.O.Paton Electric Welding Institute of the National Academy of Sciences of Ukraine;
3. NEYLO Inna - leading engineer of the "Materials for welding and electrometallurgy" department of the E.O.Paton Electric Welding Institute of the National Academy of Sciences of Ukraine ;
4. PANOV Yevgen - Doctor of Technical Sciences, professor, dean of the engineering and chemical faculty of the National Technical University of Ukraine "Ihor Sikorsky Kyiv Polytechnic Institute";
5. KIYKO Serhiy - Doctor of Technical Sciences, Chairman of the Board of the Private Joint-Stock Company "Electrometallurgical Plant "Dniprospetsstal" named after A.M. Kuzmin";
6. LOGOZYNSKIY Ihor - director of technology and quality of the private joint-stock company "Electrometallurgical Plant "Dniprospetsstal" named after A.M. Kuzmin";
7. FEDKOV Oleksiy - head of steel production of the private joint-stock company "Electrometallurgical Plant "Dniprospetsstal" named after A.M. Kuzmin";
8. LEVIN Boris (posthumously).
Since the beginning of the war, the importance of metallurgical products, which are widely used in the production of modern equipment and weapons for the Armed Forces, has increased many times. The work of the authors is aimed at reducing energy and resource consumption, improving working conditions in metallurgy and the environmental condition in industrial regions, and is therefore important for the post-war recovery of Ukraine.
The authors created composite (cored) graphitized electrodes for industrial electric arc steel melting furnaces, which have no analogues in the practice of world electrometallurgy. The introduction of compounds of elements of Group I and Group II of the Periodic Table with a low electron work function into the composition of core contributes to the ionization of gases in the column of the electric arc. The arc of the cored electrode is distinguished by high electrical and spatial stability, has a lower temperature and lower specific indicators of electric current and power compared to the arc of a monolithic electrode.
The results of work on the use of cored electrodes were implemented on 12-ton direct current furnaces (PJSC "Feroks") and 6- and 50-ton alternating current furnaces (PJSC "Dniprospetsstal"). More than 2,000 tons of 14 different grades of steel (carbon, low-alloyed, high-strength, alloyed tool, and others) were melted at the DSV-50 furnaces.
The consumption of active electricity for steel melting are reduced by 12.0-30.0%, graphite electrodes by 16.1-31.4%, losses in fumes of alloying elements are reduced by 6.0-17.4%, noise level and emissions of dust and gases by 8.0-12.0%, etc. The economic effect from using cored electrodes at PJSC "Dniprospetsstal" amounted to UAH 562 per ton of steel.
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