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冶金工业部根据行业特点,在全国炼铁行业中,针对生铁不足这个薄弱环节,系统开展高炉分等晋级、分档达标的升级活动。我们把全国158座100立方米以上的高炉,根据原料条件(入炉品位)的差异和炉子大小划分了四个档
According to the industry characteristics, the Ministry of Metallurgical Industry has systematically carried out upgrading activities for classifying and classifying blast furnaces in accordance with the weak link of insufficient pig iron in the nation’s ironmaking industry. We divided 158 blast furnaces with a volume of 100 cubic meters or more across the country into four grades based on the difference in raw material conditions (injected grade) and the size of the furnace.