涟钢210t转炉厂RH精炼过程温度变化研究

基于RH精炼处理的基本原理,结合涟钢RH-MFB实际生产和经验数据,重点对涟钢RH-MFB精炼过程温度的变化规律、温度变化的影响因素进行分析。结果表明,在精炼开始阶段的0～10 min钢包内钢液温降趋势明显,吹氧炉次在开始的10 min温降速度为1.7℃/min,未吹氧炉次为2.0℃/min。在极限真空循环处理前,吹氧炉次与未吹氧炉次的温降均随初始碳含量及进站温度的升高而增大;对于吹氧炉次,1 Nm3氧参加碳氧反应释放出的热量能使得210 t钢水温度上升大约0.18℃,溶解1 Nm3氧放出的热量能使210 t钢液温度上升0.06℃。实际生产过程的大部分炉次基本与计算值一致,吹氧加铝升温时温度变化计算值与实际值基本相当,除个别炉次相差较大外,其他炉次相差均在4℃以内。

Research on Temperature Variety during RH Refining in RH-MFB of Liangang

Based on inner principle, the regularity of temperature change during RH- MFB refining and the factors that influence the temperature are specially analyzed combined with practical production and experiential data of RH- MFB in Liansteel. The result shows that the temperature drop of molten steel is obvious trend during 0 - 10 rain of the beginning stage of refining. The temperature falling velocity of oxygen blowing heats and non oxygen blowing heats in the 10 min are 1.7 ℃/min and 2.0 ℃/min respectively. The temperature falling increased with initial carbon content and inlet temperature. As for oxygen blowing heats, heat, released by C- O reaction and dissolution of 1 Nm^3 oxygen, enables the temperature of 210 t molten steel raising 0.18 ℃ and 0.06 ℃ respectively. The values of most practical heats are approximately identical to the calculative values. The value of temperature variety is basically identical with the calculated values. With few exceptions, the gap between practical and calculative values is within 4 ℃.