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Development of Metallurgy in Russia and CIS
ArticleName Energy- and resource-saving procedure for drying and heating of carbon-bearing ladle lining using electric heaters
ArticleAuthor Ya. L. Kats, M. V. Krasnyanskiy
ArticleAuthorData

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

Abstract

 

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.

 

keywords Steel pouring ladle, heating, drying, lining, temperature, gas-air burners, refractories, electric heaters, carbon, periclase, oxidation rate
References

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