EKTA Scientific and Technical Company (Moscow, Russia):

V. S. Malinovskiy, e-mail: info@stf-ecta.ru

Different publications represent a comparison of direct current arc furnaces made abroad with electric arc furnaces. It is fairly evidenced that advantages are insignificant, and we are fully agree with that. However any comparison was never made with such a furnace type as General-Purpose Direct Current Arc Furnaces of New Generation (GPDCAF-NG) that originated and made by our company. This is despite the fact that such furnaces are in industrial operation for a long time and the results of their operation are well known at least in Russia. GPDCAF-NG can not be compared with direct current arc furnaces (including those made abroad) due to the fact that they are fundamentally different in part of furnace body structure, melting methods, and production possibilities. GPDCAF-NG provides high and industrial operation proven parameters that are achieved thanks to a special system of patented engineering solutions including such a part as the use of direct current arc. This is a simple solution to change alternating current arc system to direct current one to manufacture melting furnaces of minimum costs; however by this way our parameters are impossible to be realized. Therefore, the furnaces with minimized cost thanks to simple engineering solutions can not be a fair base for competition. We are not aware about any furnaces made by other manufacturers and achieved our level of performance. It seems necessary to give as much information as possible about new production possibilities provided by GPDCAF-NG to specialists in the area of iron, steel and aluminum based alloys production processes and corresponding equipment in the case that such information will sharply improve performance characteristics and production process output. In addition, this is necessary to compare them with conventional production methods and equipment. Russian machine building industry modernization currently poses an urgent problem to upgrade active foundries and create new ones. Melting facilities of most foundries have become obsolete and require to be upgrading and replacing. The correct selection of new equipment and technology makes the products competitive at present time and will make it competitive in future. In this way, we have not to take into account only well advertised and widely spread products made by well known companies, but we need to provide their fair evaluation in comparison with other products newly developed (i.e by domestic manufacturers). It is often impossible to correct any mistakes in choice of metallurgical equipment due to its high cost and accompanying work charges that negatively influence on the future of foundries and makes them disable to be domestically and abroad competitive. Certified name of furnaces in the range from GPDCAF-NG -0,5 to GPDCAF-100 illustrates their general purpose type because the whole above mentioned product range is melted in the same furnace body structure and no replacement is required. 0,5–100 is a capacity of furnaces in tons. For foundries which are supplied with our 0,5–30 t capacity furnaces, we are ready for supply furnaces with capacity of up to 100 tons. GPDCAF- NG can be supplied as a separate set or by upgrading active alternating current arc furnaces.

1. Afonaskin A. V., Andreev I. D., Malinovsky V. S. et al. Rezultaty pervogo etapa osvoeniya dugovogo plavilnogo agregata postoyannogo toka novogo pokoleniya na OAO “Kurgabnashzavod” (The results of the first stage of DC arc new generation melting system mastering at JSC “Kurganmashzavod). Liteinoe proizvodstvo = Foundry. 2000. No. 11.
2. Volodin A. M., Bogdanovsky A. S., Malinovsky V. S. Rezultaty raboty pechi postoyannogo toka DPPTU-20 na AOOT “Tyazhpressmash” (The results of DC furnace capacity 20 ton operation at “Tyazhpressmash”). Liteinoe proizvodstvo = Foundry. 2004. No.11.
3. Malinovsky V. S. Pech postoyannogo toka (DC furnace). Russian Federation Patent No.1464639.
4. Zakomarkin M.K., Lipovetsky M. M., Malinovsky V. S. Pech postoyannogo toka moshchnostyu 25 t na PO “Izhstal” (DC arc furnace 25 ton capacity at PO “Izhsteel”). Stal = Steel, 1991. No. 4.
5. Afonaskin A. V., Andreev I. D. A report at the conference “DC arc furnaces”. Ryazan. “Tyazhpressmash”. 2004
6. Ovsov N. S., Malinovsky V. S, Yarnykh L. V. Pervyi etap osvoeniya agregata dugovykh pechey postoyannogo roka novogo pokoleniya dlya plavki chugunnoy struzhki (The first stage of mastering DC arc new generation furnace for iron turnings melting).
7. Malinovsky V. S. Razvitie i issledovanie dugovoy plavki alyuminievykh splavov (Development and investigation of arc melting of aluminum alloys). The Report of All-Union Science & Research Institute of Electrothermal Equipment. 1986.
8. Malinovsky V. S, Brezhnev L. V., Gaevsky S. A., Krukov A. S. Opyt promyshlennoy ekspluatatsii dugovykh pechey postoynnogo toka dlya plavki aluminievykh splavov (Experience of production operation of DCAF for aluminum alloys melting). Liteinoe proizvodstvo = Foundry. 2001. No. 5.
9. Smolyarenko V. V., Muller F. Elektrostaleplavilnoe proizvodstvo v nachale XXI veka (Electrical steel melting production at the beginning of 21^st century). Sral = Steel, 20014. No. 11.
10. Malinovsky V. S. Podovyi elektrod elektropechi (Bottom electrode of electrical furnace). Russian Federation Patent No.2112187.
11. Malinovsky V. S. Sposob elektroplavki i dugovaya pech dlya ego osushchestvleniya (Electrical melting method and arc furnace to perform it). Russian Federation Patent No. 2104450.
12. Malinovsky V. S., Malinovsky V. D., Meshkov M. A., Yarnykh L.V. Plavka alyuminievykh splavov v dugovykh pechakh postoyannogo toka. Status i perspektiva novoy tekhnologii (Melting of aluminum alloys in DC arc furnaces. The status and perspectives for new technology). Metallurgiya mashinostroeniya = Machine-building metallurgy, 2004. No. 4.
13. Malinovsky V. S. Dugovaya pech postoyannogo toka (DC arc furnace). Russian Federation Patent No. 2045826.
14. Malinovsky V. S. Sposob plavki metalla v dugovoy pechi postoyannogo toka (Metal melting method in DC arc furnace). Russian Federation Patent No. 21090773.