AL2O3 AND AL2O3-SIC-C REFRACTORY BASED ZONAL LINING FOR HOT METAL LADLE ADAPTED TO REDUCE WEAR AND MOUTH, JAM

摘要

The present invention relates to zonal refractory lining for hot metal ladles adapted to minimize wear and mouth jam. The zonal refractory lining is adapted to ensure a balanced wear throughout the ladle lining, using materials having different physico-chemical properties to take care of metal impact, erosion/corrosion and abrasion resistance. Importantly, the lining reduced heat loss, easy dismantling in case of metal penetration through working lining, less mouth jam and easy de-skulling, favoring improved campaign life, increased ladle availability, at lowered production cost. The ladle lining comprised castables and refractory bricks involving Alumina- Silicon carbide-Carbon (Al2O3-SiC-C bricks) in slag /mouth zone as well as use of 70% alumina low cement castable in top 200- 250 mm and spout. Consequently, the ladle life is increased to about 817 to 925 heats, compared to conventional 575-600 heats favoring wide industrial application of such ladles/linings in steel plants for transferring/carrying hot metal from blast furnace to mixers of Steel Making Shop.