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以120t精炼钢包为原型,利用相似原理建立了钢包的物理模拟系统,模拟钢包底吹氩工艺.通过测定不同的底吹条件对钢包混匀时间的影响,确定120t钢包底部透气砖位置和底吹工艺.研究发现,采用5#,6#位置的单透气砖或1#5#,2#6#位置的双透气砖进行钢包底吹氩,均有利于缩短钢包的混匀时间.底吹气量小于0.30Nm3/h时,最佳位置的6#单透气砖的混匀时间比最佳位置的2#6#双透气砖的短,而底吹气量大于0.30Nm3/h后,这两个位置的单透气砖和双透气砖的混匀时间很接近.喷吹夹角小的双透气砖比夹角大的双透气砖搅拌钢液的效果好,靠近钢包壁布置透气砖不利于底吹气体搅拌钢液.对于2#6#双透气砖供气,在D1方向的A,B,C3个位置喂线有利于获得短的混匀时间.
The 120t ladle was taken as the prototype, and the physical simulation system of the ladle was established by using the similar principle to simulate the ladle argon blowing process. By measuring the influence of different bottom blowing conditions on the ladle mixing time, the position and bottom blowing of the bottom of the ladle Technology.The study found that the use of a single air brick 5 #, 6 # position or 1 # 5 #, 2 # 6 # position of the double breathable brick ladle argon blowing are conducive to shorten the ladle mixing time. When less than 0.30Nm3 / h, the optimal mixing time of 6 # single brick is shorter than 2 # 6 # double brick with the best position, while the bottom blowing quantity is more than 0.30Nm3 / h, Of the single breathable brick and double breathable brick mixing time is very close.Printing a small angle of the two breathable brick than the angle of the double breathable brick mixing liquid effect is good, near the ladle wall of the ventilation brick is not conducive to the end of blowing gas Mixing the molten steel.For 2 # 6 # double brick supply, feeding in the D1 direction of the A, B, C3 position is conducive to short mixing time.