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塔塔钢铁公司期望通过在烧结生产中应用生物质材料来替代部分焦粉的使用,这些生物质材料最好取自当地。预计烧结厂焦粉用量大约为26.4万t/a。本文中,将考虑最高达20%的燃料,即5.3万t焦粉用生物质材料替代。根据常规生物质材料的平均热值,大约需10.6万t生物质替代5.3万t(20%)的焦粉。根据生物质燃料的化学性能、价格和热值,在烧结生产中对几种不同类型的生物质燃料进行了研究和测试。它们的适宜性在生命周期评价中已被确定。选出的生物原料在试验室进行小规模试验以检测其火焰前锋、烧结温度和传热特性、烧结速度、烧结时间、烧结效率、烧结矿质量和最优粒度尺寸以及水分等。同时也研究了生物质燃料的能量密度增加技术。规模不同的试验和生命周期评价模型显示:15%的生物质材料替代会减少10%的CO2排放。对于一家典型的长流程钢厂,以2016年每吨CO2排放费用为40欧元计算,相当于每吨热轧卷可节约成本2.2欧元。
Tata Steel expects to replace some of the coke powder by applying biomass materials in the sintering process, preferably from local sources. It is estimated that the amount of coke powder used in the sintering plant is about 264,000 t / a. In this paper, up to 20% of the fuel is considered, ie 53,000 t coke powder is replaced with biomass material. Depending on the average calorific value of conventional biomass materials, approximately 106,000 t of biomass is required to replace 53,000 t (20%) of coke powder. Several different types of biomass fuels have been studied and tested in sintering production based on their chemical properties, price and calorific value. Their suitability has been identified in the life-cycle assessment. Selected biological raw materials in the laboratory for small-scale test to detect the flame front, sintering temperature and heat transfer characteristics, sintering speed, sintering time, sintering efficiency, sinter quality and optimal particle size and moisture. Also studied the biomass fuel energy density increase technology. Tests and life-cycle assessment models of differing scales show that a 15% replacement of biomass materials will reduce CO2 emissions by 10%. For a typical long-run mills, the cost of € 40 per ton of CO2 emissions per ton in 2016 is equivalent to a saving of € 2.2 per ton of HRC.