钢包精炼炉(LF)钢液流动的数学物理模拟与优化

应用相似原理和流体力学理论,利用电导率法和PHOENICS平台对钢包精炼炉(上、下口直径分别为2 310 mm和1 984 mm,内腔高2 620 mm,透气砖直径104 mm)钢液流动状态进行了水模拟和数学模拟,由实验和计算结果得出,离钢包底中心520 mm的2^#底吹位置比离中心354 mm的1^#位置获得的流场和均匀时间更合理,在≤300 L/min时,随吹气量增大,混匀时间减少,但>300 L/min时,继续增大吹气量,混匀时间不再变化。40 t BOF-LF-CC生产结果表明,采用优化工艺后,钢中全氧量降低2×10^-6,达到15.2×10^-6,钢中夹杂物也显著减少。

Math-Phys Simulation and Optimization of Molten Flow in Ladle Furnace

 Using similitude principle and hydrokinetics theory, the water simulation and mathematic simulation of molten steel flow condition in ladle furnace (upper and bottom diameter- 2 310 mm and 1 984 mm, height of ladle furnace- 2 620 mm, porous block diameter- 104 mm) have been carried out by conductivity testing and Phoenics software. The test and results showed that the molten steel flow pattern and mixing time at 2 ^# blowing location (520 mm from ladle bottom center) was more idea than that at 1 ^# blowing location (354 mm from ladle bottom center) ； and as argon flow rate no more than 300 L/min, with increasing blowing rate the mixing time decreased, as aigon flow rate more than 300 L/min, with further increasing blowing rate the mixing time no longer change. The results of 40 t BOF-LF-CC production showed that with using optimum process the total oxygen content in steel decreased by 2x 10^-6 , to 15.2 X 10^-6 , and the amount of inclusion in steel decreased obviously.