Improving the equipment and technology for drying and warming up linings of steel-teeming ladles

Abstract

The replacement of the acid linings of steel-teeming ladles using domestic refractories by imported linings, the more rigorous requirements on preparation of the ladles, and the increase in the cost of power determined the need to reconstruct the drying and warming up stands in the ladle section of the electric steel-melting shop of the Moldovan ISW. The implementation of high-intensity melting in powerful DSP-10016 arc furnaces, the introduction of steel treatment outside a furnace into the flow sheet, and the blowing of inert gases through the ladles considerably worsened the service conditions for the ladle walls and bottom. The use of chamotte piece refractories and also of silica fused compounds based on quartzite did not ensure the required stability of the ladle lining under these conditions and required the reoutfitting of the entire ladle fleet of the shop with linings meeting the new requirements. According to the design solution, the drying and warming up of the 130-ton steel-teeming ladles has been performed on four stands (Fig. 1) that include bed 1 for vertical installation of the ladle, steel lid 2 with openings for organized removal of combustion products into an aspiration system and with type GNP burner 3 built in along the center with a length of 4.6 m and a capacity of 300 m3/h, a cantilever sle-