The invention relates to a cold material distribution method for improving the condensation speed and strength of continuous casting open head billet, including assembly, seam filling and material distribution. Before the continuous casting of continuous casting, the head of the ingot rod is put into the mold first, and the gap between the head of the ingot and the copper plate of the wide surface of the mold is sealed with the plugging material. After the filling is completed, the spiral cold material is spread on the head of the ingot, and the three layers of cold material are evenly placed along the width direction of the two narrow sides of the mold. The two spiral cold materials are evenly placed along the length direction in the ingot head, and the two layers of cold material are evenly placed along the length direction in the position of the outer arc swallowtail trough in the ingot head. The invention can not only greatly reduce the impact force of the steel liquid on the ingot head plugging material and enhance the cooling rate of the steel liquid in the head of the ingot, but also can effectively enhance the bonding strength and tightness between the billet head and the ingot tail slot, so as to ensure the high strength of the condensed steel liquid in the short time before the emergence of the seedling, so that the casting billet is made. It can safely output the crystallizer and sector section.
【技术实现步骤摘要】
一种提高连铸开浇头坯冷凝速度和强度的冷料布放方法
本专利技术涉及连铸机开浇工艺
,更具体地说是指一种提高连铸开浇头坯冷凝速度和强度的冷料布放方法。
技术介绍
板坯连铸机在开浇前需先将引锭头部穿送至结晶器内,并使用纸皮、石棉绳和铁屑等堵流材料对引锭头和结晶器宽面铜板之间的缝隙进行密封。开浇时将钢液连续不断地注入结晶器内,在引锭头部冷料和结晶器冷却系统的作用下,已注入的钢液与引锭头部接触并填充引锭头,其中与引锭头部接触的钢液会快速冷凝并与引锭头燕尾槽凝结成一体,而与结晶器宽面铜板接触的钢液则会逐渐凝成具有一定厚度的均匀的坯壳。当结晶器内的钢液蓄存到一定高度且达到出苗时间后,启动铸机拉矫并经由引锭杆承载和牵引输出结晶器。输出结晶器的冷凝钢液经过扇形段二冷室的二次冷却和扇形段驱动装置的拉坯和矫直作用,最后拉出得到铸坯。铸坯经由火切机切割得到一定长度的连铸坯以供轧钢厂轧制。但是在钢液和引锭头接触冷却过程中,注入的钢液会对纸皮、石棉绳和铁屑等堵流材料直接进行冲刷。若出苗前与引锭头接触的冷凝钢坯强度不足或未充分凝固,就会使板坯连铸机在起步输出铸坯的过程中出现开浇漏钢或引锭 ...
【技术保护点】
1.一种提高连铸开浇头坯冷凝速度和强度的冷料布放方法,其特征在于:包括装配、填缝和布料,具体步骤如下:(1)装配:在连铸开始浇筑前,将引锭杆头部穿送至结晶器内;(2)填缝:使用堵流材料对引锭头与结晶器宽面铜板之间的缝隙进行密封;(3)布料:堵流材料填充完成后,将冷料平铺于引锭头上,在结晶器的两个窄面沿宽度方向均匀摆放三层冷料,该冷料平行于结晶器宽面铜板;在引锭头内弧沿长度方向均匀摆放两层冷料,该冷料垂直于结晶器的宽面铜板;在引锭头外弧燕尾槽位置沿长度方向均匀摆放两层冷料,该冷料平行于结晶器宽面铜板。
【技术特征摘要】
1.一种提高连铸开浇头坯冷凝速度和强度的冷料布放方法,其特征在于:包括装配、填缝和布料,具体步骤如下:(1)装配:在连铸开始浇筑前,将引锭杆头部穿送至结晶器内;(2)填缝:使用堵流材料对引锭头与结晶器宽面铜板之间的缝隙进行密封;(3)布料:堵流材料填充完成后,将冷料平铺于引锭头上,在结晶器的两个窄面沿宽度方向均匀摆放三层冷料,该冷料平行于结晶器宽面铜板;在引锭头内弧沿长度方向均匀摆放两层冷料,该冷料垂直于结晶器的宽面铜板...
【专利技术属性】
技术研发人员:陈重赟,王龙飞,郑永平,
申请(专利权)人:福建三钢闽光股份有限公司,
类型:发明
国别省市:福建,35
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