TECHNOGENIC MINERAL FORMATION IN REFRACTORY MATERIALS IN THE OPEN-HEARTH PROCESS

A study has been made in a series of researches by authors of the present article of features of the change in phase and chemical composition of magnesia refractory mixes, used in the hearths of open-hearth furnaces and subject to chemical corrosion during their reaction with metallurgical melts. During performance of this work the hearth wear mechanism was studied during service using for ramming magnesia powder grade PPM-85 (GOST 24862) of domestic production (OAO Kombinat Magnezit). Previously magnesia dolomite mixes grade Ankerhearth [1] and Jehearth grade [2], obtained from overseas enterprises, were studied for this purpose.