中间包钢水连续测温技术分析与应用

Analysis and application of continuous temperature measurement technology for liquid steel in tundish

为了研究中间包钢水温度变化规律,提高中间包温度合格率,准确指导钢水精炼温度调整操作,依托太钢连铸中间包钢水连续测温系统,通过对比分析传统手动测温与连续测温的优劣,研究了不同工艺路线下典型钢种中间包钢水温度变化规律。结果表明,中间包钢水连续测温系统具有稳定性好、响应速度快等优点,测温准确率达92%;对碳钢而言,仅过LF工艺的Q235钢种炉均温降速率为0.17℃/min,过"LF+RH"工艺的Q345钢种炉均温降速率仅0.05℃/min;对过"AOD+LF"工艺的不锈钢而言,304和316镍不锈钢炉均温降速率均为0.15℃/min,430铬不锈钢温降速率为0.09℃/min。中间包钢水连续测温技术对稳定连铸生产和提升连铸坯质量具有重要意义。

In order to study the temperature change law of molten steel in tundish,improve the qualified rate of tundish temperature,and accurately guide the temperature adjustment operation of molten steel refining,relying on the continuous temperature measurement system of molten steel in continuous casting tundish of TISCO,the temperature change law of typical steel tundish under different process routes was studied by comparing and analyzing the advantages and disadvantages of traditional manual temperature measurement and continuous temperature measurement.The results show that the continuous temperature measurement system of liquid steel in tundish has the advantages of good stability and fast response,and the accuracy rate of temperature measurement is 92%;for carbon steel,the average temperature drop rate of Q235 steel grade passing through LF process is 0.17℃/min,and that of Q355 steel grade passing through"LF+RH"process is only 0.05℃/min.For stainless steel passing trough"AOD+LF"process,the average temperature drop rate of 304 and 316 Ni-Stainless steel is 0.15℃/min,and that of 430 Cr-Stainless steel is 0.09℃/min.Continuous temperature measurement technology of liquid steel in tundish is of great significance to stabilize continuous casting production and improve slab quality.