Was very high including the nickel stainless steel's recycling use factor, reduced the carbon withdrawal
2008-02-22 15:28: 24
Yale University's newest research indicated that may conserve energy above 2/3 with scrap steel smelting including the nickel austenite stainless steel, its another environmental protection superiority is the carbon dioxide reduces row of 70%. The stainless steel already became one of circulation use factor highest materials, theoretically speaking, if the scrap steel quantity is sufficient, stainless steel smelting may use the scrap steel completely. However, durable is also one of stainless steel main superiority, the stainless steel structure and the product may use the very long very long time. Simultaneously the stainless steel demand achieves the historical maximum level, developing country capital constructions and so on China, India needs the massive stainless steel. In order to meet this need, the primitive raw material's amount used grew unceasingly, reduced the scrap steel ratio. The steel products demand meets the flatten out finally, at present uses the stainless steel will become future renewable resource, will account for the proportion in the total demand to be higher, therefore, the scrap steel proportion will increase in present's stainless steel production. Will cross 20~30 year scrap steel quantity to grow largely again, because the nowadays uses stainless steel several dozens years later because of obsolete will be renewed. At present, user's scrap steel originated is mainly 60~ the 70s's product, at that time the stainless steel amount used is lower than obviously the present. The Yale University topic is “the stainless steel circulation use energy superiority” memoir publication in energy policy (Energy Policy) on, just like reports indicated that the high regeneration use factor has the obvious environment superiority. In present produces can, the whole world produces 17,000,000 ton austenite stainless steel, in the entire production cycle, the disposable energy consumption for 9.0×1017 the joule, the carbon dioxide withdrawal is 61,000,000 tons. Compared to carries on the production according to the current scrap steel, with only uses the primitive resources production to compare, the disposable energy consumption reduces approximately 33%, the carbon dioxide reduces the row approximately 32%. If the stainless steel uses the scrap steel production (is merely completely supposition), may conserve energy 67%, the carbon dioxide reduces row of 70%. This confirmed this research's judgment, mining and the ore smelting consume energy most much, uses the scrap steel to be possible to omit this working procedure. The research supposition already obtained the confirmation. The memoir separately to the austenite stainless steel's principal constituent nickel, the chromium and the iron has conducted the research. The respective opinion and the data gathering, from the global production, 100% circulation use and use the raw material three different angles to analyze the stainless steel and for the environment completely the influence. At present was only on specific has studied the different metal life cycle, will use from now on also these data analysis production raw material or the retreatment scrap steel energy consumption situation.
