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安赛乐米塔尔汉堡厂作为一个小型钢厂,主要生产高等级的焊丝、轮胎钢丝和预应力钢材。钢厂产线设备包括1台MIDERX设备、电炉、钢包炉、1台连铸机以及1台棒线轧机。厂内最大的能源用户是直流电炉和使用天然气的MIDREX直接还原炉。MIDREX设备和EAF组合在西欧也是少有的,与传统高炉流程相比,即使在使用100%DRI(直接还原铁)条件下,汉堡厂的CO2排放也已经处于较低水平。为进一步降低CO2排放,过去几年实施了一些能源高效利用项目,将对此进行详述。所有这些项目都基于对工艺的精细分析,以及对满足运行功能的准确定位。通过这种方式,即使有些项目的投资回报率很低,也能够被支持和执行。着重阐述了EAF变压器、罗茨风机和干法除尘三个项目,并对其进行深入分析。总之,通过减少天然气和电能的使用,每年直接和间接的CO2排放量分别稳定减少47 000 t。
ArcelorMittal Hamburg plant as a small steel mills, the main production of high-grade wire, tire steel and prestressed steel. The mill’s line equipment includes one MIDERX unit, an electric furnace, a ladle furnace, a caster and a bar and wire mill. The largest energy users in the plant are DC furnaces and natural gas-based MIDREX direct reduction furnaces. The combination of the MIDREX plant and EAF is also uncommon in Western Europe, where the CO2 emissions at the Hamburg plant are already relatively low even with 100% DRI (direct reduced iron) compared with the traditional blast furnace process. To further reduce CO2 emissions, several energy-efficient projects have been implemented over the past few years, as will be described in more detail. All of these projects are based on a detailed analysis of the process, as well as an accurate positioning of the function to meet the operation. In this way, even though the ROI of some projects is low, they can be supported and implemented. The three projects of EAF transformer, Roots blower and dry dust removal are emphatically described and analyzed in depth. In summary, the direct and indirect CO2 emissions decreased by 47,000 tons each year, respectively, by reducing the use of natural gas and electricity.