Continuous Casting Protecting Slag Effect On Billet Quality And Application

Continuous casting crystallizer protection slag is artificial,mainly in the silicate compound as main ingredient,and accompanied by a functional form various chemical fluxes and carbon skeleton composed of materials.With the rapid development of the iron and steel industry,iron and steel market requirements for billet quality continues to rise,at the same time,the continuous casting technology is demanded more and more strictly.But, for now, between the physical and chemical properties,mold slag’s direct continuous casting and the casting quality links have is the key factor that influences the development of continuous casting technology.Therefore,to maximize the protection of various functions of continuous casting slag,improve the surface quality of billet,ensure all the steel in the production process in the production of smooth,these are the problems should be concerned about the current metallurgical workers,which requires technical workers in the actual production process,a careful analysis of every link of production,realize the combination of theory and practice,so as to solve the technical problems related to the target.Aiming Hebei Iron and Steel Group and Chengde Steel Branch vanadium steel rolling factory Billet continuous casting process, the slab surface is easy to produce longitudinal cracks, leading to serious problems bonding breakout, the original protective slag improved to adaptation site production process. Experimental determination of the melting point of slag samples, melting rate, viscosity and crystallization temperature, analyze the relationship between powder properties and composition, and then the process parameters according to the site, to be improved on the basis of the original powder, make a fresh powder formulations.By casting field test showed that the powder improved significantly improves the surface quality of slab,billet qualification rate reached effectively improve,with favorable results.