Research on jet characteristics of double Mach number oxygen lance nozzles for 120 t converter
A double Mach number nozzle oxygen lance was designed to address the issues of short lifespan,splashing,sticking,burning,and long blowing time during the converter blowing process.Based on traditional oxygen lance nozzles,a central hole was added.Numerical simulation was applied to establish mathematical models and analyze the characteristics of supersonic jets at different Mach numbers.The findings say that among the three schemes in this design,the scheme with Mach number of 1.98 for the central hole and 2.08 for the peripheral hole can achieve a better blowing effect;the double Mach number oxygen lance has a significant advantage in terms of effective impact area compared to traditional oxygen lances,and the central hole can offset the negative pressure zone under the lance caused by the traditional peripheral five-hole arrangement,thereby reducing the incidence of nozzle sticking.Therefore,the double Mach number oxygen lance can improve the nozzle life and increase the stability of blowing.
converter steelmakingdouble Mach number oxygen lancejet characteristicsnumerical simulation
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