LI Chong-wei
,
CHENG Guo-guang
,
WANG Xin-hua
,
ZHU Guo-sen
,
CUI Ai-min
钢铁研究学报(英文版)
A mathematical model in present study has been established to investigate the effect of Rheinstahl Heraeus (RH) blow argon mode on the decarburization rate in ultra-low carbon steel refining based on the RH equipment of Shougang Qian′an Iron and Steel Co Ltd (SQISCO). The calculated results show that the increase of argon flowrate promotes the carbon elimination from argon gas bubble surface, molten steel free surface in vacuum as well as splash droplet surface, while reduces that from the interior of liquid steel. It has been found the critical turning point of flowrate ascension is at the 5th minute and the optimum blow argon flowrate in later stage is 2100 L/min in accordance with the 2 stages argon blow mode, which have been confirmed in the commercial production in SQISCO.
关键词:
RH
,
vacuum
,
mathematical model
,
argon flowrate
,
decarburization
滕召杰，程树森，杜鹏宇
钢铁
颗粒在高炉内的运动包括溜槽内运动及空区运动。炉料在空区的运动过程由溜槽末端的速度决定。因此，正确描述颗粒在溜槽内的运动对高炉精准布料十分重要。描述溜槽内颗粒运动的数学模型已有不少，但已有的数学模型是描述颗粒在溜槽内沿直线运动的一维模型。通过对实际高炉布料过程料流轨迹的监测发现，颗粒在溜槽内的运动并非一维运动，而是三维运动。笔者通过对颗粒在溜槽内的受力分析，建立颗粒运动的三维数学模型，准确计算炉料颗粒的落点，分析空区的料流宽度，分析溜槽长度，溜槽转速以及溜槽倾动距对颗粒三维运动的影响。计算结果与实测数据相吻合。
关键词:
无钟炉顶
,
mathematical model
,
burden flow width
