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Life cycle assessment (LCA) as a product-oriented environmental management tools, through the evaluation of the environmental impact of a product or service throughout the life cycle of the system (including access to raw materials, production and product manufacturing, product use until final disposal) Its purpose is coordinated with the environment in its life cycle and adapt to avoid the conclusion of the one-sided result due to the limitations of the traditional environmental impact assessment of the material. The LCA application has covered the entire industrial society, the various aspects involved in the design of industrial products and production processes, evaluation, and environmental policy development, waste management, become the tool of choice for many developed countries industrial development strategy. In accordance with the principles and techniques of existing life cycle assessment framework, our superior resources magnesium metal is selected as the object of study, to evaluate select representative products wheels. The scope of the study, including raw materials production, wheel hub machining manufacturing, the use of the hub and the hub recycling processing the four stages of the composition of the full life-cycle process that mainly include ore mining selected mining election auxiliary materials, transportation, ore of smelting, refining and ingots, alloy production hub production and auxiliary materials, production processes, use and regeneration of the wheel hub. Firstly, the production of our country at this stage the application of more aluminum alloy wheels (ZL101) full life-cycle analysis, and magnesium alloy wheels (AZ91D) life-cycle analysis. Finally, analysis of the results of the characterization of the environmental impact of functional units alloy wheels with magnesium alloy wheels, to compare magnesium alloy wheels in alternative alloy wheels strengths and weaknesses. Can be found through the various stages of the environmental impact of magnesium alloy wheels and aluminum alloy wheel hub, magnesium alloy, alloy wheels production pollutants emitted mainly two stages in the production of raw materials and hub. Stage in the production of raw materials, non-renewable resource consumption, greenhouse gases, ozone depletion and acid gas emissions than the aluminum emissions, and 14% higher, respectively, 60%, 71% and 47%, respectively. Photochemical smog formation, human health damage potential (GWP) and eutrophication than low magnesium. Were 45%, 17% and 29%, respectively. In the production phase of the hub, in addition to non-renewable resource consumption, the three indicators of the eutrophication of the ozone layer broken ring and water is lower than that of aluminum, were 96%, 90% and 14%. Other indexes slightly higher than aluminum magnesium than aluminum, respectively 82%, 90%, 98%, 92% and 1.11 times. The hub phase is mainly caused due to its own weight, its resources, emission rata calculation, the ratio of 0.67:1.00. Recycling stage magnesium alloy overall slightly higher than that of aluminum alloy, at this stage magnesium alloy of non-renewable resources, the greenhouse effect, ozone layer destruction, acidification effects of latent value, the formation of photochemical smog, human health damage potential values ??and eutrophication aluminum alloy high 9%, 14%, 26%, 12%, 4%, 11% and 11%. The lifecycle evaluation summary obtained all seven evaluation, magnesium alloy wheels than low alloy wheels, respectively, for 75% of the aluminum alloy, 82%, 68%, 93%, 67%, 14%, 32% . That magnesium alloy wheels with better social and environmental benefits. Through the environmental impact assessment of the magnesium alloy wheels and aluminum alloy wheel hub, the results obtained not only for the environmental load evaluation of magnesium, aluminum and its processed products, as well as magnesium aluminum Department alloy products provide data to support, but also of magnesium, aluminum industry to carry out energy-saving emission reduction and sustainable development decision-making data based on.
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