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Aleksandrov A.G.,RAS Trapeznikov Institute of Control Sciences | Livatkin P.A.,RAS Trapeznikov Institute of Control Sciences | Polozhentsev K.A.,OAO Metallurgicheskii Zavod Elektrostal
Steel in Translation | Year: 2015

Experiments are conducted on voltage control in a DVS-3.2-G1 vacuum arc furnace at OAO Metallurgicheskii Zavod Elektrostal. Using coefficients obtained in the course of the experiment, voltage control is simulated for the vacuum arc furnace. The results of simulating the furnace voltage with droplet closure are presented for the fifth hour of the process. The model control resembles the practical results. Comparison with other research indicates that this model may be used in the design of a control system for a vacuum arc furnace. © 2015, Allerton Press, Inc. Source


Aleksandrov A.G.,RAS Trapeznikov Institute of Control Sciences | Livatkin P.A.,RAS Trapeznikov Institute of Control Sciences | Polozhentsev K.A.,OAO Metallurgicheskii Zavod Elektrostal
Steel in Translation | Year: 2015

A model is proposed for the voltage control in a vacuum arc furnace, so as to reduce power costs and wastage and to improve ingot quality. The goal of control is basically to maintain the difference between the specified and actual voltage within permissible limits. The model is based on equations for the furnace voltage, the electrode gap, the displacement of the electrode and the attached rod, the behavior of the dc motor, and the droplet weight. Droplet formation is analyzed. The stepwise growth in droplet formation is described by a system of equations. © 2015, Allerton Press, Inc. Source


Shil'nikov E.V.,OAO Metallurgicheskii Zavod Elektrostal | Alpatov A.V.,Moscow Institute of Steel And Alloys | Paderin S.N.,OAO Metallurgicheskii Zavod Elektrostal
Steel in Translation | Year: 2013

The actual activity of oxygen in liquid metal is determined by means of sensors during the ladle treatment of 08X18H10T high-alloy steel. The activity of the components of the metallic and oxide solutions is calculated by means of models of a pseudosubregular solution for the liquid metal and a pseudoregular solution for the oxide slag. The corresponding energy parameters were determined in previous research. A formula is derived for the activity of oxygen in equilibrium with the components of Fe-Cr-Ni-Mn-Si-C-Al-Ti liquid steel, eight-component FeO-MnO-CaO-MgO-SiO2-CrO1.5-AlO1.5-TiO2 slag, and the gas phase. It is found that the metal-slag-gas system at the end of reduction is considerably closer to equilibrium than at the end of oxidation. The development of the reduction process is studied in terms of the difference in chemical potentials of the actual and equilibrium oxygen. © 2013 Allerton Press, Inc. Source


Sisev A.A.,OAO Metallurgicheskii Zavod Elektrostal | Paderin S.N.,OAO Metallurgicheskii Zavod Elektrostal
Russian Metallurgy (Metally) | Year: 2015

Electrochemical measurements in liquid metals and oxygen activity calculations from the results of these measurements are carried out in melting alloyed steels for control of the technological processes of oxidative refining and the deoxidation of a liquid metal. There are no literature data on electrochemical measurements in a liquid metal for melting complex alloys deeply deoxidized by aluminum, titanium, magnesium, calcium, lanthanum, and cerium in vacuum induction furnaces. The problems of the theoretical substantiation of the possibilities of modern Cr–Cr2O3|ZrO2(MgO) oxygen sensors to monitor the oxygen activity in deeply deoxidized multicomponent metallic solutions and the conduction of emf measurements by these sensors in a metal in vacuo become challenging. These problems are discussed in the present article. © 2015, Pleiades Publishing, Ltd. Source


Il'inskii A.I.,OAO Metallurgicheskii Zavod Elektrostal | Livatkin P.A.,OAO Metallurgicheskii Zavod Elektrostal | Polozhentsev K.A.,OAO Metallurgicheskii Zavod Elektrostal
Steel in Translation | Year: 2015

At OAO Metallurgicheskii Zavod Elektrostal, a new automated control system for vacuum-arc remelting has been introduced at vacuum-arc furnace 8. The quality of the ingots obtained after vacuum-arc remelting with the new and old control systems in smelting shop 6 is compared, for EI435 alloy. In vacuumarc remelting, the quality of ingots from furnace 8 exceeds that for ingots from furnace 10. After treatment of the ingots in a 6300 press in forging and pressing shop 2 and in the 250/350 mill in rolling shop 3, metal savings of up to 83 kg per metric ton are noted for the products based on ingots from furnace 8. © 2015, Allerton Press, Inc. Source

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