Larionov O. Development and introduction the resource-saving technology of production pipe-plate steels of high quality

Designed and realized by numeric method the mathematical model of heat state the oxygen converter lining with due regard for cycles, working, slagging, temperatur dependence of refractory heat-physical properties. Dynamic picture of temperature distribution, heat accumulation by lining at a heat period, during blowing and between heats were received, including under "locking" the throat during long idle time. Calculations are confirmed by experiments. Designed and introduced new exothermic slag mixtures, which allow under their use reduce sulphur content in ready steel in times in comparison with ordinary solid slag-forming mixtures and reduce consumption of cast iron, as well as aluminum. Technology of steel modification by cored-wire filled with aluminum and calcium was introduced. It is shown, that the best assimilation of Al and Ca in ready metal is reached under their relation 60:40. Technology of chemical heating is introduced, that has allowed to shorten an amount of incomplete pour heats from 3,2 to 1,34 %, reduce the losses of metal at discharges, shorten technological idle time and enlarge into two times serialness of continuously cast heats. As the result of complex measures, high-effective resource-saving technology was developed and introduced. It includes deep desulphurization by new slag-forming mixtures, modification of steel by developed powdery mixtures, homogenization of chemical composition and temperature of metal by inert gas blowing, correcting a contents of alloying elements, injection of different powdery materials. All that allows to get metal with low contents of carbon and sulphure, and as well to realize heating of metal at the expense of alumino-thermic and silicon-thermic reactions.