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J_B12.25帽部减少钢水量580kg,切头率由16.8％下降到12％,相当于提高成坯率5％。经解剖,钢锭一次缩孔小于7％,说明缩小帽部容积是可能的。在不减少浇高的情况下,缩小帽部的断面尺寸,可达到缩小帽部容积的目的。由于帽部断面大幅度缩小,使每锭减少850kg,一炉钢等于增加两个锭,同时解决了J_B12.52脱锭难的问题。浇铸的钢锭表面质量良好,中心疏松和偏析轻微,钠质良好。1985年平均提高成坯率1.8％,总效益达138.1万元。
J_B12.25 cap to reduce the amount of steel 580kg, cutting rate from 16.8% to 12%, equivalent to increasing the green rate of 5%. Anatomically, a shrinkage of steel ingot is less than 7%, indicating that it is possible to reduce the cap volume. Without reducing the pouring of the case, reducing the cross-sectional size of the cap, you can achieve the purpose of reducing the volume of the cap. Due to a substantial reduction of the cap section, so that each reduction of 850kg, a furnace is equal to the increase of two ingots, J_B12.52 solves the difficult problem. Cast ingot surface of good quality, center loose and segregation minor, good sodium. In 1985, the average increase of billet 1.8%, the total benefit of 138.1 million yuan.