Исследование причин отсортировки листового проката по дефектам кислородно-конвертерного цеха

It was found that there is an increase of defective steel on first melts in series of casting and on melts with new tundish during casting on continues casting machine №6 of JSC «Magnitogorsk iron and steel works». During this research different technological parameters of oxygen-converter shop which could influence on increasing of defective production on first melts in series of casting and on melts with new tundish were analyzed. The work of slotplugs in steel ladle, effectiveness of argons work in mixing steel in ladle and quality of purifying steel from nonmetal impurities during melting and treatment of steel in ladle were also analyzed. The content of oxygen in steel before continues casting and content of oxygen in slabs was also analyzed (on first melts in series of casting and on melts with new tundish and also on other melts (not the first in series)). The influence of refractories of tundish on increasing of defective steel was also analyzed. The analyze didn’t show the technological parameters, which were the main reason of increasing of defective steel on the first melts in series according to the other melts (not the first in series). We can just conjecture that increasing of defective production is linked with higher temperature of steel in the end of treatment of steel in ladle.