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缩小帽(板)部的浇高或减少帽(板)部的容积,是提高成坯率的一项有效措施。为此,必须减少钢锭头部的热损失。采用保温型膨胀防缩孔剂,延长了钢锭的凝固时间30min,一次缩孔深度不超过6%。膨胀防缩孔剂用量约为0.1kg/t 钢,加入方法简单方便。钢的内在质量较好,性能可靠,轧后废品下降,成坯率平均提高0.83%。按年产镇静钢160万 t 计,年直接经济效益为104万元,间接经济效益360万元。
Reduce the hat (plate) Department of the Ministry of pouring or reducing the volume of the cap (board) Department, is to improve the rate of blank into an effective measure. For this reason, it is necessary to reduce the heat loss of the ingot head. The use of thermal expansion shrinkage inhibitor, extended the ingot solidification time 30min, a shrinkage depth of not more than 6%. Expansion anti-cratering agent dosage is about 0.1kg / t steel, adding method is simple and convenient. The inherent quality of steel is better, the performance is reliable, the rolled scrap decreases, the billet rate increases by 0.83% on average. According to the annual output of 1.6 million tons of stabilized steel, the annual direct economic benefit is 1.04 million yuan and the indirect economic benefit is 3.6 million yuan.