Based on the operating conditions of oxygen lance utilized for a 50 t converter in Tangsteel,gas jet flow fields of three types of oxygen lances were simulated by FLUENT software.The influence of lance configuration a...Based on the operating conditions of oxygen lance utilized for a 50 t converter in Tangsteel,gas jet flow fields of three types of oxygen lances were simulated by FLUENT software.The influence of lance configuration and lance level on penetrating area was studied through cold model experiment.The results showed that the gas flow velocities of four-hole,variable angle four-hole and five-hole oxygen lances declined rapidly with an increase in gas jet length within 1 m,1 m and 0.8 m,respectively.Besides,the multi gas streams sprayed from these three lances should be syncretized at 1.6 m,1.7 m and 1.4 m,respectively.At the highest lance level,the effective penetrating area of these three lances could be 0.255 m2,0.385 m2 and 0.0907 m2,respectively.It was suggested that the effective penetrating area of variable angle four-hole oxygen lance was the biggest,while that of five-hole oxygen lance was the least.The validity of numerical simulation results was proved through cold model experiment.The lance level was suggested to be controlled in the range of 1-1.6 m,1-1.7 m and 0.8-1.4 m for the four-hole,variable angle four-hole and five-hole oxygen lances,respectively.展开更多
为达到大型复吹转炉低成本、高效化生产的目标,河钢宣钢二钢轧厂针对品种比提高后工艺和设备上暴露出来的问题进行了技术改造。通过取消地磅称重、优化底吹模式、调整氧枪喷头参数、重设出钢口形状等措施,使铁水入炉温度提高约10~15℃,...为达到大型复吹转炉低成本、高效化生产的目标,河钢宣钢二钢轧厂针对品种比提高后工艺和设备上暴露出来的问题进行了技术改造。通过取消地磅称重、优化底吹模式、调整氧枪喷头参数、重设出钢口形状等措施,使铁水入炉温度提高约10~15℃,供氧流量提高约2 500 m 3/h,出钢时间缩短至4.5 min,改善了冶金反应的动力学条件,在强化冶炼的基础上,降低了生产成本。展开更多
文摘Based on the operating conditions of oxygen lance utilized for a 50 t converter in Tangsteel,gas jet flow fields of three types of oxygen lances were simulated by FLUENT software.The influence of lance configuration and lance level on penetrating area was studied through cold model experiment.The results showed that the gas flow velocities of four-hole,variable angle four-hole and five-hole oxygen lances declined rapidly with an increase in gas jet length within 1 m,1 m and 0.8 m,respectively.Besides,the multi gas streams sprayed from these three lances should be syncretized at 1.6 m,1.7 m and 1.4 m,respectively.At the highest lance level,the effective penetrating area of these three lances could be 0.255 m2,0.385 m2 and 0.0907 m2,respectively.It was suggested that the effective penetrating area of variable angle four-hole oxygen lance was the biggest,while that of five-hole oxygen lance was the least.The validity of numerical simulation results was proved through cold model experiment.The lance level was suggested to be controlled in the range of 1-1.6 m,1-1.7 m and 0.8-1.4 m for the four-hole,variable angle four-hole and five-hole oxygen lances,respectively.
文摘为达到大型复吹转炉低成本、高效化生产的目标,河钢宣钢二钢轧厂针对品种比提高后工艺和设备上暴露出来的问题进行了技术改造。通过取消地磅称重、优化底吹模式、调整氧枪喷头参数、重设出钢口形状等措施,使铁水入炉温度提高约10~15℃,供氧流量提高约2 500 m 3/h,出钢时间缩短至4.5 min,改善了冶金反应的动力学条件,在强化冶炼的基础上,降低了生产成本。