From 1993 at U. S. Steel Kosice, blast furnaces #2 and #3 are equipped with a coal injection system. The decision to build this equipment was made after economic calculations determined it would be more strategically advantageous to build a new modern facility for coal injection than to overhaul #2 coke battery. In the nineties, the yearly consumption of pulverized coal injection (PCI) was about 280 0001 of dry coal, which represented a specific PCI rate of approximately 100 to 135 kg/thm. Whereas the price difference between coal and metallurgical coke is quite big, the investment into building the coal injection facility returned within 3 years since its start-up and in next years since then it brings costs saving for production of hot metal in U. S. Steel Kosice. In addition, by applying PCI injection technology to Kosice blast furnaces, technological conditions of blast furnaces operating showed improvements as well: 1. production increased an average of + 400 to 500 t/day, 2. improvement of pig iron production economics not only because of replacing the metallurgical coke by PCI, but also because of decreasing of total fuel rate for production of It of hot metal, 3. blast furnace gas utilization increased with ETA CO values around 48%, 4. the running of blast furnace is more regular, above all by regular burden descend, etc.
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机译：从1993年开始，在美国钢铁科希策公司的2号和3号高炉都配备了喷煤系统。在经济计算确定建造一个新的现代化喷煤设施比检修2号焦炭电池更具战略优势之后，才决定建造该设备。在90年代，粉煤喷射（PCI）的年消耗量约为280 0001干煤，这意味着PCI的比重约为100至135 kg / thm。尽管煤和冶金焦之间的价格差异很大，但自投产之日起3年内投资建设喷煤设施的投资就已收回，此后的下一年又为美国钢铁厂Kosice的铁水生产节省了成本。此外，通过将PCI喷射技术应用于Kosice高炉，高炉运行的技术条件也得到了改善：1.生产平均每天增加+400至500吨，2.生铁生产经济性的提高不仅是因为用PCI代替冶金焦的方法，也是由于降低生产铁水的总燃料费率的原因； 3。高炉煤气利用率以ETA CO值在48％左右增加； 4。高炉运行更加规律，尤其是按常规负担下降等
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