State Scientific Center of RF All-Russian Design and Research Institute of Metallurgical Machine-Building named after A. I. Tselikov (Moscow, Russia):

Ya. L. Kats, Cand. Eng., Deputy Head of Department
M. V. Krasnyanskiy, Scientific Fellow, e-mail: krasnianskiy@vniimetmash.ru

Energy- and resource saving drying and heating procedure of carbon-periclase lining of casting ladles using electric heaters has been designed. At the first stage, heating to 200 °C and consequent holding during 3 hours at this temperature have been conducted in order to remove physical and crystallized water. Then lining has been heated to 600 °C with consequent calcination during 4 hours for finishing the coking process in the complete refractory volume; it occurs in oxidizing atmosphere, formed by air injection in the ladle. The last stage ios presented by forced heating of lining at maximal capacity to working temperature in the neutral atmosphere, formed by injection of inert gas (nitrogen or argon) in the ladle. Methods of mathematical simulation and its experimental verification shows that the proposed method will reduce the cost of drying and heating, decrease duration preparation of a new ladle for its use by 1.5–2 times as well as improve the lining life by 10-15 %. It is also shown that electric lining heating in the inert atmosphere allows to decrease carbon burning from refractories and to rise their resistance. Usage of electric heaters for drying and high-temperature heating of periclase-carbon ladle lining also allows to lower harmful emissions in the atmosphere.

1. Belkovskiy A. G., Krasnyanskiy M. V., Kats Ya. L. Povyshenie effektivnosti proizvodstva stali na elektrometallurgicheskikh zavodakh maloy proizvoditelnosti (Increasing of steel production efficiency at low-capacity electrometallurgical plants). Chernaya metallurgiya. Byulleten nauchno-tekhnicheskoy i ekonomicheskoy informatsii = Ferrous metallurgy. Bulletin of scientific-technical and economic information. 2015. No. 2. pp. 40–49.
2. Karbidokremnievye nagrevatelnye elementy Kanthal Globar©SD (Silicon-carbide heating elements Kanthal Globar©SD). Available at: http://www2.kanthal.com/C12570A7004E2D46/062CC3B-124D69A8EC1256988002A3D76/DDE6A857C-0FA1F78C12570C20051578C/$file/10-B-2-9%20globar%20SD%20RU.pdf?OpenElement (accessed: February 05, 2012)
3. Bershitskiy I. M., Tararyshkin A. V. Energosberegayushchie i ekologicheski bezopasnye ustanovki dlya elektricheskoy sushki i podogreva futerovki kovshey (Energy-saving and environmentally-friendly plants for electric drying and heating of ladle lining). Stal = Steel. 2010. No. 2. pp. 24–25.
4. Krasnyanskiy M. V., Kats Ya. L., Bershitskiy I. M. Effektivnost elektronagreva stalerazlivochnykh kovshey (Efficiency of electroheat of steel-pouring ladles). Metallurg = Metallurgist. 2012. No. 5. pp. 48–53.
5. Jochen Allenstein. Ogneupornye materialy. Struktura, svoystva, ispytaniya: spravochnik (Taschenbuch. Feuerfeste Werkstoffe. Aufbau. Eigenschaften. Prüfung). Gerald Routschka, Hartmut Wuthnow (Hrsg.). Übersetzt von Deutsche. Moskau : Intermet Engineering, 2010. 392 p.
6. Khoroshavin L. B., Perepelitsyn V. A., Kononov V. A. Magnezialnye ogneupory : spravochnik (Magnesia refractories : reference book). Moscow : Intermet Engineering, 2001. 576 p.
7. Matveev M. V., Temlyantsev M. V. Obezuglerozhivanie periklazouglerodistykh ogneuporov pri teplovoy obrabotke futerovok stalerazlivochnykh kovshey (Decarburization of periclase-carbonaceous refractories during the thermal treatment of steel-pouring ladle linings). Metallurg = Metallurgist. 2010. No. 8. pp. 60–62.
8. Matveev M. V. Povyshenie stoykosti periklazouglerodistykh futerovok stalerazlivochnykh kovshey na osnove primeneniya resursosberegayushchikh tekhnologiy razogreva : avtoreferat dissertatsii ... kandidata tekhnicheskikh nauk (Increasing of durability of periclase-carbonaceous linings of steel-pouring ladles on the basis of application of resource-saving heating technologies : thesis of inauguration of Dissertation … of Candidate of Engineering Sciences). Novokuznetsk, 2013. 22 p.
9. Temlyantsev M. V., Matveev M. V., Temlyantseva E. N. Issledovanie vliyaniya razlichnykh faktorov na obezuglerozhivanie periklazouglerodistykh kovshovykh ogneuporov (Research on influence of various factors on decarburization of periclase-carbonaceous ladle refractories). Izvestiya vuzov. Chernaya metallurgiya = Proceedings of Universities. Ferrous metallurgy. 2011. No. 10. pp. 32–36.
10. V. Krasnyanskiy, Ya. L. Kats, I. M. Bershitskiy. Sposob sushki i podogreva uglerodsoderzhashchey futerovki stalerazlivochnykh kovshey (Method of drying and heating of carbon-containing lining of steel-pouring ladles). Application: 2014116659 RF : IPC7 B 22 D 41/02 / M. Applier: JSC «VNIIMETMASh». Applied: April 25, 2014.
11. Krasnyanskiy M. V., Kats Ya. L Razrabotka energo- i resursosberegayushchego rezhima ekspluatatsii stalerazlivochnykh kovshey metodami matematicheskogo modelirovaniya (Development of energy- and resource-saving exploitation mode of steel-pouring ladles by mathematical modeling). VI mezhdunarodnaya konferentsiya «Metallurgiya-Intekheko-2013» (The VI International conference “Metallurgy-Inteсheсo-2013”). Moscow, 2013. pp. 35–38.
12. Krasnyanskiy M. V., Kats Ya. L., Bershitskiy I. M. Optimizatsiya temperaturnogo rezhima vnepechnoy obrabotki stali metodami matematicheskogo modelirovaniya (Optimization of temperature mode of secondary metallurgy by mathematical modeling). XII Mezhdunarodnyy kongress staleplavilshchikov (XII International congress of steelmakers). Moscow, 2013. pp. 161–164.
13. Krasnyanskiy M. V., Kats Ya. L. Opredelenie integralnogo koeffitsienta teplovogo izlucheniya periklazouglerodistoy futerovki (Definition of integral coefficient of thermal radiation of periclase-carbonaceous lining). Metallurg = Metallurgist. 2014. No. 5. pp. 57–59.
14. Determination of the Integral Emissivity of a Periclase-Carbon Lining. Metallurgist. 2014. Vol. 58, No. 5-6. pp. 388–391.
15. Spirin V. A., Chernavin S. B. et al. Tekhnologiya sushki i nagreva futerovki stalerazlivochnykh kovshey s obezvrezhivaniem otkhodyashchikh gazov (Technology of drying and heating of steel-pouring ladle lining with waste gas deactivation). Chernaya metallurgiya. Byulleten nauchno-tekhnicheskoy i ekonomicheskoy informatsii = Ferrous metallurgy. Bulletin of scientific-technical and economic information. 2013. No. 7. pp. 57–61.