WANG Ming-lin
,
L Ying-hua
,
YANG Wen-yuan
,
LI Shu-gui
,
XU Xiao-wei
钢铁研究学报(英文版)
Based on the on-site investigation and the principle of compressible flow, the working oxygen pressure should be matched to the Mach-number at the nozzle in designing nozzle and oxygen supply schedule so that the higher penetration depth and the more blending energy can be obtained for reducing energy loss by shock wave in the ultrasonic oxygen jet in the normal BOF steelmaking. For some special BOF blowing technologies, such as steelmaking with high phosphorus hot metal, post combustion oxygen lance, hot metal pretreatment, etc, the difference between working oxygen pressure and designed diffusion pressure which is related to Mach-number is necessary, so that the velocity of the oxygen jet will be decreased because of shock wave for expected metallurgical results.
关键词:
oxygen pressure
,
Mach-number
,
steelmaking
,
penetration depth
王琳松，杨茂麟，郑家良，高长益，任正德
钢铁
水钢采用低比例的钒钛矿高炉炼铁，获得含有钒钛等微量元素的铁水，其性质既不同于一般铁水，也不同于高钒钛铁水，为了弄清这些微量元素对转炉炼钢工艺的影响，分析了钒钛钢渣的物相、熔化性，用高频感应炉模拟转炉吹炼过程并结合生产试验得知：1）普通铁水的碳焰温度为1370～1400℃，水钢铁水的碳焰温度为1400～1430℃，比普通铁水高约30℃；2）在较小的供氧速度下，铁水中的钛、硅、锰可与碳分阶段氧化；3）含有TiO2炉渣的发泡能力、储泡能力强于不含TiO2的炉渣，炉渣中的CO反应性气泡使炉渣的发泡更加严重；4）在转炉吹炼前中期，炉渣中过高的FeO、较低的碱度，炉渣中大量的C-FeO反应，以及含有TiO2炉渣的储泡性质，是喷溅的主要原因。
关键词:
转炉
,
steelmaking
,
hot metal
,
V-Ti
,
foaming behavior
,
slopping
