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。
Abstract
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.