REFRACTORY BLOCK AND FURNACE Russian patent published in 1997 - IPC

FIELD: furnace units. SUBSTANCE: furnace has a side wall and a lower wall with refractory lining. To install auxiliary equipment, for example, electrode, refractory blocks are inserted into lower wall of the furnace. To install each refractory block, an opening with great diameter in outer surface of furnace and opening with smaller diameter in the lining are drilled. Refractory block has stepped structure to be tightly inserted into drilled opening. Central through opening in refractory block encloses a mobile plug, which can be displaced by the aid of auxiliary appliance. EFFECT: diversified functional capabilities of furnace. 6 cl, 4 dwg