摘要
为了探究自摆动喷枪喷吹石灰石脱磷的可行性,建立了自摆动喷枪喷吹石灰石粉脱磷的冷态模型,用水模拟铁水,PMMA粉模拟石灰石粉,真空泵油模拟炉渣,压缩空气模拟氧气,研究了喷头马赫数、喷孔夹角、枪位、供料速度和石灰石粉粒度对熔池内传输动力学条件的影响。结果表明,拉瓦尔喷头可以用于石灰石粉喷吹,但是马赫数不宜太大,最佳马赫数为1.8;熔池内传输的动力学条件随喷孔夹角的增大逐渐改善,但喷孔夹角过大会导致穿透比急剧减小和喷溅程度急剧恶化,最佳喷孔夹角为25°;试验喷枪最佳操作参数为,枪位200 mm,供料速度1.8 kg/min,石灰石粉粒度0.164 mm。
In order to explore the feasibility of dephosphorization by the free swing lance injecting limestone powder,a cold model of the free swing lance injecting limestone powder to dephosphorization system was established to investigate the effect of the Mach number of nozzle,the nozzle’s angle,the lance height,the feeding speed and the particle size of injection system on the transmission dynamics condition in the melt bath. The water,the polymethylmethacry late particle,the vacuum-pump oil and the compressed air were used to simulate the hot metal,the limestone powder,the slag and the oxygen respectively. The results showed that the Laval nozzle could be used to inject limestone powder,but the Mach number of the nozzle should not be too large. The optimal Mach number was 1.8. The transmission dynamics condition in the melt bath became better with the increasing of the nozzle’s angle,but the particle penetration ratio would increase and the splash would decrease sharply if the nozzle’s angle was too large. The optimum parameters of the nozzle’s angle,the lance height,the feeding speed and the particle size were 25°,200 mm,1.8 kg/min and 0.164 mm respectively.
作者
张波
吴巍
吴伟
王天明
罗林根
王雨晗
ZHANG Bo;WU Wei;WU Wei;WANG Tian-ming;LUO Lin-gen;WANG Yu-han(Metallurgical Technology Research Department,Central Iron and Steel Research Institute,Beijing 100081,China;Administration Office,China Iron and Steel Research Institute Group,Beijing 100081,China;Resource Application and Alloy Materials Business Department,New Metallurgy Hi-Tech Co.,Ltd.,Beijing 100081,China)
出处
《钢铁》
CAS
CSCD
北大核心
2019年第1期28-32,共5页
Iron and Steel
基金
国家重点研发计划资助项目(2017YFB0304000
2017YFB0304003)
北京市自然科学基金面上资助项目(2172057)
国家自然科学基金资助项目(51704080)
关键词
自摆动喷枪
脱磷
混匀时间
颗粒穿透比
喷溅
freely swing lance
dephosphorization
mixing time
particle penetration ratio
splash
