Refractory in Ladle Flow Control and Purging System

Abstract

Continuous strive towards new technology introduced reliable flow control systems that enable safe and prolong tapping liquid steel from ladle to tundish with consistent and high casting rate. Thus, synchronization of operational parameters, appropriate refractory and analysis of probable failure are essential and encountered. Erosion of bore and corrosion of sliding surface of the slide plates, radial cracking of plates and metal leakage are the most critical issues as addressed with mention of optimize refractory quality of plates and nozzles to prolong casting time. In order to homogenous the molten steel gas purging is an important aspect and thus different types of purging plugs, their design, refractory quality and the effect of casting sequences had also been discussed. Thermal stressed failure and premature wear may reduce the operational safety and promote shop floor safety hazards are also highlighted.