The environmental issues associated with packaging materials have been attracting increasing attention.Life cycle assessment( LCA) is currently the main method used worldwide for evaluating green packaging materials. ...The environmental issues associated with packaging materials have been attracting increasing attention.Life cycle assessment( LCA) is currently the main method used worldwide for evaluating green packaging materials. In this study,the LCA method was used to evaluate the environmental impact of Baosteel’s newly developed process for manufacturing film-laminated steel packaging materials,from raw material mining,production,and processing to their storage,consumption,recycling,and final disposal. The environmental performance and main influencing factors were analyzed and compared. In addition,the life cycle environmental characteristics of film-laminated steel cans,tin-plated steel cans,and aluminum cans were compared. Of the main environmental indicators of the life cycle of the film-laminated steel can,the environmental load of the substrate accounts for the largest proportion,follow ed by electricity. The environmental impact of the production of film materials cannot be ignored. The overall environmental performance of film-laminated steel cans is better than that of aluminum cans.展开更多
CO2 emission of the steel industry takes up a great proportion of the total emission of the world. It is necessary to reduce the CO2 intensity of steel products in order to save energy,protect the environment and keep...CO2 emission of the steel industry takes up a great proportion of the total emission of the world. It is necessary to reduce the CO2 intensity of steel products in order to save energy,protect the environment and keep a sustainable development in the steel industry. Based on the research of steel products＇ life cycle inventory, those who conducted this research have focused on the analysis of CO2 emission factors and measures. Adopting the life cycle inventory model of a certain steelmaking site,together with the Tornado Chart, the researchers have identified significant factors, provided some explanation, and suggested some possible measures to reduce CO2 emission. The results have shown that the most important factors are the CO2 intensity of blast furnace gas （BFG）, hot metal ratio of basic oxygen furnace （BOF） and the material utilization efficiency. Accordingly,some measures such as removing CO2 in BFG,decreasing the hot metal proportion in BOF, and improve material utilization efficiency in each process ,may be taken to decrease CO2 emission.展开更多
High functionality given to steel products results in an increase of environmental loads in the steelmaking stage. However, at the stage of their utilization, the high-functional steel products prove to be more enviro...High functionality given to steel products results in an increase of environmental loads in the steelmaking stage. However, at the stage of their utilization, the high-functional steel products prove to be more environmentally friendly than their conventional counterparts in many cases. In view of this contradiction, the evaluation on the contribution of steel products to environmental improvement requires a more integrated approach--Life Cycle Assessment （ LCA ）, which incorporates the effects over the products＇ entire life cycles. This paper discusses the relationship between the improvement of steel products＇ performance and the according environmental impact from the entire life cycle perspectives. How to evaluate and assess the contribution of high-functional steel products to environmental improvement using LCA method is explained in detail. Two case studies of Baosteel are given to substantiate the effectiveness of LCA as a scientific and systematic method for eco-material evaluation or eco-design： @ For a power transformer, by replacing silicon steel B30G130 with B30Pll0,the carbon dioxide emissions were reduced by 15.1% over the life cycle of the transformer. @ Tinplate steel of Baosteel used for two-piece steel cans experienced six reductions in thickness from 0.28 mm to 0.225 mm,which results in a 14.5% emission reduction over the life cycle of two-piece steel cans.展开更多
文摘The environmental issues associated with packaging materials have been attracting increasing attention.Life cycle assessment( LCA) is currently the main method used worldwide for evaluating green packaging materials. In this study,the LCA method was used to evaluate the environmental impact of Baosteel’s newly developed process for manufacturing film-laminated steel packaging materials,from raw material mining,production,and processing to their storage,consumption,recycling,and final disposal. The environmental performance and main influencing factors were analyzed and compared. In addition,the life cycle environmental characteristics of film-laminated steel cans,tin-plated steel cans,and aluminum cans were compared. Of the main environmental indicators of the life cycle of the film-laminated steel can,the environmental load of the substrate accounts for the largest proportion,follow ed by electricity. The environmental impact of the production of film materials cannot be ignored. The overall environmental performance of film-laminated steel cans is better than that of aluminum cans.
文摘CO2 emission of the steel industry takes up a great proportion of the total emission of the world. It is necessary to reduce the CO2 intensity of steel products in order to save energy,protect the environment and keep a sustainable development in the steel industry. Based on the research of steel products＇ life cycle inventory, those who conducted this research have focused on the analysis of CO2 emission factors and measures. Adopting the life cycle inventory model of a certain steelmaking site,together with the Tornado Chart, the researchers have identified significant factors, provided some explanation, and suggested some possible measures to reduce CO2 emission. The results have shown that the most important factors are the CO2 intensity of blast furnace gas （BFG）, hot metal ratio of basic oxygen furnace （BOF） and the material utilization efficiency. Accordingly,some measures such as removing CO2 in BFG,decreasing the hot metal proportion in BOF, and improve material utilization efficiency in each process ,may be taken to decrease CO2 emission.
文摘High functionality given to steel products results in an increase of environmental loads in the steelmaking stage. However, at the stage of their utilization, the high-functional steel products prove to be more environmentally friendly than their conventional counterparts in many cases. In view of this contradiction, the evaluation on the contribution of steel products to environmental improvement requires a more integrated approach--Life Cycle Assessment （ LCA ）, which incorporates the effects over the products＇ entire life cycles. This paper discusses the relationship between the improvement of steel products＇ performance and the according environmental impact from the entire life cycle perspectives. How to evaluate and assess the contribution of high-functional steel products to environmental improvement using LCA method is explained in detail. Two case studies of Baosteel are given to substantiate the effectiveness of LCA as a scientific and systematic method for eco-material evaluation or eco-design： @ For a power transformer, by replacing silicon steel B30G130 with B30Pll0,the carbon dioxide emissions were reduced by 15.1% over the life cycle of the transformer. @ Tinplate steel of Baosteel used for two-piece steel cans experienced six reductions in thickness from 0.28 mm to 0.225 mm,which results in a 14.5% emission reduction over the life cycle of two-piece steel cans.
