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沸駦钢在包钢的钢产量中一直占有较大的比重。1978年,沸駦钢占平炉钢的42.6％,占转炉钢的几乎100％。根据订货要求,计划铜种均为3号钢(实际上生产一卩分2号钢)。沸駦钢的生产工艺与国内其他钢厂相似:出钢时将锰铁加于钢罐内(终点碳低时允许向罐内加焦粉增碳;同时也可加少量铝块调(大正)钢液氧化性);采用下注法注成7.1吨钢锭,注速约为200～300毫米/分,注完向钢锭投入硅铁(75％Si,粒度<25毫米)封顶,硅铁用量约为500～600克/吨钢。钢锭经1150初轧机轧成大号异型坯及外拨方坯、中板坯。1978年全年的沸駦钢锭轧后废品率为3.27％,缺陷分类如下:
Boiling steel in the Baotou steel production has always accounted for a larger proportion. In 1978, boiling 駦 steel accounted for 42.6% of open hearth steel, accounting for almost 100% of converter steel. According to the order requirements, plan copper species are 3 # steel (in fact, the production of 1 # 2 points). Boiler production technology and similar to other domestic steel mills: the steel will be added to the steel when tapping (when the end of the carbon low to allow the tank plus coke powder carbon; also add a small amount of aluminum block (Taisho) liquid steel Oxidation); Injection method using the betting 7.1 tons of steel ingot, injection speed of about 200 ~ 300 mm / min, the end of the ingot into the ferrosilicon (75% Si, particle size <25 mm) cap, ferrosilicon dosage of about 500 ~ 600 g / t steel. Steel ingot 1150 by the beginning of rolling mill into large square and outbound billet, slab. In 1978, the boiling rate of steel ingot after rolling was 3.27%. The defects were classified as follows: