STUDYING THE POSSIBILITY OF USING COHERENT TYPE NOZZLES FOR BOF BLOWING AT THE GAS DYNAMIC SIMULATION STAND

Introduction. The BOF technology is the leading one in production of structural steel due to its undeniable advantages.Problem Statement. In conditions most Ukrainian converter shops, when blowing parameters change significantly during campaign (temperature lining, dimensions workspace, quality scrap metal, temperature and composition iron), bath blown at a constant flow rate with conventional Laval nozzles, sometimes it impossible ensure stable purging process high post-combustion CO up CO2. Therefore, main problems oxygen conversion improvement designs devices, particular, nozzles.Purpose. purpose this research study possibility using nozzles coherent type for top converter.Material Methods. research, we have used samples coherent-design laboratory having different central part-to-periphery ratio under fixed equal general jet output (percentage annular gap total area nozzle, %: 75, 65, 50, 45, 35, 25). They been studied by calculating momentum, through weighing taking shadow shots gas velocity reaches 2 M. results compared those cylindrical nozzle.Results. When supplied M, coherent-type fraction outer part 65—75% contribute formation 1.5—1.6 times wider jets as multinode structure. It helps increase momentum 45—55%.Conclusions. design nozzle an share 75% can be recommended second tier or level lance surface contact. efficiency from waste gases expected increasing reaction additional jets.