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大连钢厂与黑龙江省穆棱县石墨工业公司组成的固体保护渣试验小组,从1980年起先后试验15个牌号保护渣,分别在同一锭盘上进行对比试验,按采用渣系,将锭分批加工成120mm方坯,然后酸洗坯表面,对坯的四个面进行评级,据44炉,840支钢锭,2520支轧坯的结果,认为用MB25渣所浇的钢锭及其轧坯表面质量为最佳。较用原柳毛721渣保护所浇的钢锭,及其轧坯表面质量有明显地改善,MB25渣的轧坯表面修磨面积较721渣减少41％。接着作生产推广试验,共浇255炉,3918t
Dalian Mills and Muling County, Heilongjiang Province, graphite industrial company composed of solid powder test group, from 1980 onwards has tested 15 brands of mold flux, respectively, in the same plate on a comparative test, according to the slag system, the ingot According to the results of 44 furnaces, 840 steel slabs and 2520 bloom slabs, it is considered that the slab poured with MB25 slag and the surface of the slab The best quality. Compared with the ingot slabs protected by the original willow wool 721 slag, the surface quality of the rolled billets was significantly improved. The surface grinding area of the billets of the MB25 slags was 41% less than that of the 721 slags. Followed by production promotion experiment, a total of 255 furnaces, 3918t