Guniting the roof of open-hearth furnaces at the Zaporozhstal' plant

Conclusions Laboratory analyses and industrial-scale tests resulted in the development of the technological parameters for guniting the lining of the main roof of 500-ton open-hearth furnaces operated at an accelerated melting cycle.The microstructure of chromite and chrome — magnesite coatings containing low-melting additives was analyzed and the chemical composition and structure of coatings which had served in the roof of an open-hearth furnace were determined.The work carried out at the Zaporozhstal' Steel Plant confirmed the effectiveness and advantages of guniting the roof of large-tonnage open-hearth furnaces.Translated from Ogneupory, No. 5, pp. 28–35, May, 1976.