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Scrap-melting Operation by Shaft Furnace using all Conventional-size BF Coke and Steel Scrap

机译：使用所有常规尺寸的BF焦炭和钢废料的轴炉用钢管熔化操作

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In the scrap-melting operation of shaft furnaces,an operation technology has been established that allows us to melt scrap,instead of typically utilizing foundry coke by using conventional BF coke having an averaged size of 50 mm or less to the full amount of coke.According to this technology,as ferrous raw materials,instead of using return scrap of low melting point that contains carbon at 3–4％,steel scrap containing almost no carbon are used to the full amount—70％ or more of which consists of shredder scrap.This technology was explored with not only one-stage tuyere operations using sole lower tuyeres but also two-stage tuyere operations that take advantage of upper tuyeres as well.Stabilized two-stage tuyere operation technology was established by appropriately arranging parameters,such as the number of pipes,the diameter,and the protruding length of the upper tuyeres; while operation technology with high efficiency was established,which enabled us to achieve high productivity and low coke ratio.
机译：在轴熔炉的废料熔化操作中，已经建立了一种操作技术，其允许我们通过使用平均尺寸为50mm或更小的焦炭的传统BF焦炭来熔化废料，而不是通常利用铸造焦炭。根据该技术，作为铁原料，而不是使用含有碳的含有碳的返回废料，含有几乎没有碳的钢废料用于全量-70％或更多，其中包括碎纸机组成scrap.This技术进行了探讨，使用唯一的下部风嘴不仅单级风口操作，但被适当地布置的参数，如建立也可充分利用上部风嘴为well.Stabilized两级风口操作技术的两级风口的操作鞋面管的管数，直径和突出长度;虽然建立了高效率的操作技术，但我们使我们能够实现高生产率和低焦比。

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