EUROPEAN STEEL TECHNOLOGY AND APPLICATION DAYS 2017 - ESTAD 2017

Strip biting is considered the most critical moment for hot rolling. Rolling could be done only if it is succeeded; otherwise the strip cannot be threaded into the mill stand and cobble will be happened due to material accumulation. The possibility of having such problem will be increased while using RGL (Roll Gap Lubrication) during the strip head biting. Based on an empirical experience, this paper presents a taxonomy for biting cobbles during hot rolling in addition to a scientific study for determining its possible causes. In order to have a successful biting and reduce the biting cobbles, a new approach in calculating mill setup values is proposed with an empirical evaluation after applying it in Level 2 Automation system of EZDK company in Egypt.