Increase of duration and reliability of lance tips with tangential location of nozzles

Abstract

Numeric modeling of cooling water stream in lance tips with tangentially located nozzles whole, one piece chiseled, cast and weld structure are completed. It is shown that for a uniform tips nozzles tangential arrangement does not significantly complicate the design, and improves the oxygen tip cooling. Water channels, at the same time, also rationally make tangentially. For tips with separate nozzles, placing recent by double angle to the axis of the lance leads to additional overlapping sectional area for cooling water passage and structure of its flow deterioration in the tips. Depending on the size of the trunk and tip design features water pressure losses therein may be increased to two times or more. To improve the water flow organization and maintain the set pressure losses and the water flowing between nozzles proportion in the tips with tangential nozzles, optimization water separator needed. The holes therein for flowing water behind the nozzles efficiently performing with a crescent or oval shape with an angular shift to the second angle nozzle inclination. Welded lance tip with double angle nozzles are designed, wherein through outer and inner surfaces nozzle optimum shape improves its and tip generally manufacture adaptability, increasing connections nozzles with plates strength and ratability, provides at the same time: relatively low water pressure losses in the tip and a high enough proportion of its flow through center tip area, and reduces the probability of separated flows in the nozzles outlet pipe at variable oxygen flow through the lance