RESEARCH ON ALLOCATION METHOD BETWEEN IRON AND SLAG IN CARBON FOOTPRINT CALCULATION OF BLAST FURNACE
Blast furnace is a typical complex multifunctional system,producing hot metal,slag and other symbiotic products.According to the method of life cycle assessment,inventory data of the blast furnace ironmaking production process was collected.The input-output method is used to calculate the carbon footprint,and the carbon load(carbon deduction)of the input and output blast furnace system was allocated and calculated between the molten iron and blast furnace slag using system expansion method,quality allocation method,energy gangue allocation method,and economic allocation method,respectively.The results indicate that the carbon footprint of molten iron is obtained in the order of economic allocation,energy-gangue allocation,system expansion,quality allocation from high to low,while the carbon footprint of blast furnace slag is obtained in the opposite order.Among them,the energy-gangue allocation method allocates the raw material input according to its contribution ability to the formation of slag and iron,and the results obtained are more scientifically based,but the implementation process is complex.By comparing the carbon footprint results of different allocation methods,combined with the characteristics of each method and user acceptance,the system expansion method or the mass distribution method is recommended to allocate the carbon footprint among the iron slag in the ironmaking process of blast furnace.
万方数据
维普
