Papers by Keyword: Nozzle Blockage

Abstract: When teeming rare earth treated steels the nozzle blockage occurred so frequently that seriously interferes the application of RE in steels. In this study we tried to investigate the relationship between the wettablility of 16MnRE steel and nozzle materials. The results showed that the weakest wettability of steel liquid was observed on fused silica among the six nozzle materials. Next came zircon and high-alumina nozzle. It has no obvious difference between the 16MnRE steels when final deoxidized containing and not containing Al addition. The wettability of 10Ti steel was weaker than 16MnRE steels on zircon nozzle. The clay nozzle was corroded by the precipitate from steel liquid.

Abstract: In recent years, the horizontal continuous casting has been increasingly applied in a variety of aluminum products such as busbars, T-bars, foundry ingots, small diameter extrusion billets and forging feedstock, due to its high productivity and relatively low cost. By introducing the continuous process for long cast periods, feeding blockage as a unique process-related complex problem has emerged, which causes casting defects, a short cast duration and even an unexpected interruption of the cast. A literature review of the feeding blockage phenomena during continuous casting in the steel and aluminum industries is presented. The causes and mechanisms of feeding blockage in the aluminum horizontal continuous casting are proposed and discussed. Typical examples of feeding blockage from the industrial scale production with results of metallographic examination are illustrated.