An analysis of the reasons for the increased wear of the walls of the soaking pits of the 1150 slabbing mill of Il'ich plant

Conclusions It has been established that the increased wear of the silica refractory parts (concrete blocks and brick) in the soaking pit walls of the 1150 slabbing mill is caused by chemical interaction of the iron-manganese slag containing the aggressive intermetallic phase Fe_xAl_y with the silica lining with the formation of low-viscosity molten material.The type of steel has a significant influence on the wear of the lining. The most aggressive are killed and semikilled steels, which in contrast to rimmed steels are deoxidized with aluminum.The structure of refractories has a definite influence. The more dense dinas parts, which possess a strong tridymite bond of the crystals in the finely dispersed portion, are more wear resistant than the silica concrete blocks not containing tridymite.Testing of refractory concrete parts of magnesia spinellide or forsterite compositions in the walls (or only in the support zone) of soaking pits with liquid slag removal is recommended.Translated from Ogneupory, No. 3, pp. 42–46, March, 1986.