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混匀是衡量钢包底吹氩精炼冶金效果的重要指标,优化底吹氩工艺来促进混匀是钢包精炼研究的核心内容。首次提出采用双孔对称交替底吹气的方式来增强搅拌、促进混匀,采用几何相似比为1∶4的水模型,模拟现场吹气量为300L/min,对150t钢包交替吹气位置0.1R~0.5R、交替吹气时间0~15s进行研究。结果表明,随着交替吹气时间的增加,混匀时间先增加后减少;随着底吹气孔与钢包中心距离的增大,混匀时间先减少后增加;底吹气孔与钢包中心的距离为0.3R时,混匀时间最短;交替时间为15s时,混匀时间最短,比不交替吹气缩短5.5%。
Mixing is an important index to measure the metallurgical effect of argon blowing at the bottom of ladle. Optimizing the bottom blowing argon process to promote mixing is the core of ladle refining research. It is proposed for the first time to use two-hole symmetrical alternating bottom blown gas to enhance the mixing and promote the mixing. The water ratio of 1: 4 is used to simulate the inflow of 300L / min and the alternating blowing position of 150t ladle is 0.1R ~ 0.5R, alternating blowing time 0 ~ 15s for research. The results show that the mixing time increases firstly and then decreases with the increase of alternating blowing time. With the distance between the bottom blowing hole and the ladle center increasing, the mixing time first decreases and then increases. The distance between the bottom blowing hole and the ladle center is 0.3R, the mixing time is the shortest; when the alternation time is 15s, the mixing time is the shortest, which is 5.5% shorter than the non-alternating blowing.