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我厂铸造车间是大量生产农业机件的,铸铁牌号为15—32,18—36,28—48,绝大部分铸件的特点是件小,壁薄,形状复杂,平均重量不超过1公斤,壁厚为5—10公厘,最薄的2—3公厘,100％湿型,一包铁水须经过很长时间才能浇完,因此出炉温度不能太低。自从我们着手研究提高化鉄炉焦铁比以来,先后学习了很多厂的经验,改进化铁炉的工作,并在57年5月改装了废气回用管,利用废气燃烧来提高鉄水温度,使焦炭得到充分利用,从而使铁焦比提高至1∶22—23左右(层焦与层鉄此,包括接力焦,不包括底焦,下同)。
I plant casting workshop is the mass production of agricultural machinery, cast iron grades 15-32,18-36,28-48, the vast majority of casting is characterized by small, thin walls, complex shapes, the average weight of not more than 1 kg, Wall thickness of 5-10 mm, the thinnest 2-3 mm, 100% wet type, a pack of hot metal to be poured over a long time, so the temperature is not too low baked. Since we started to study and enhance the coke oven iron ratio, we have learned a lot from the experience of many factories, improved the work of the iron furnace, and in May 57, we retrofitted the exhaust gas recirculation pipe, So that coke is fully utilized, so that the iron coke ratio increased to about 1:22-23 (layer coke and layer 鉄 this, including relay coke, excluding the end coke, the same below).