METHOD FOR PROTECTION OF REFRACTORY LINING OF METALLURGICAL VESSEL Russian patent published in 1998 - IPC

FIELD: metallurgy; may be used in processes of melting the raw materials and formation of melt consisting of metal and slag. SUBSTANCE: reaction agents for melt supplied to bath of molten metal through inlet are located below and above bath surface, and gaseous reaction agents and/or gases acting inertly in bath of molten metal are supplied into melt below the bath surface. Gases liberated from melt are burnt with the help of oxidizing agents in gas space. All surface of refractory lining in gas space of metallurgical reaction vessel is wetted (continuously and fully) by partial amounts of melt in the form of drops, splashes, fluid parts rising or thrown abruptly in the form of spouts and/or waves or sharp motions of melt. Mass of melt fractions which strikes refractory surface and wets the lining is regulated. Process of wetting the surface of refractory lining is controlled with the help of velocities of flow of gaseous reaction agents and/or gases acting inertly in the melt supplied through lower lances. Velocities Qv (H cu.m/min) of flows of gaseous reaction agents through lower lances are controlled depending on the level of molten metal hb (m) and maximum height of reaction vessel for wetting all refractory surface in gas space hr (m) of reaction vessel by the following relation (hr[Qv/hb]2/3) ≤ 2.3. Inner diameter d of each lower lance surface equals at least 50 kg/sq.m. EFFECT: higher efficiency. 11 cl