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日本NKK公司于1996年10月4日在世界上首次将工业废塑料用作高炉原料(主要作还原剂),预计今年最多可利用3万t。日本每年产生废塑料约880万t,其中有效利用(垃圾发电)的仅占25%。目前,约有100家公司与NKK公司签约购买该项技术的使用权。但,氯乙烯中的氯(约占15%)对炼铁有腐蚀作用,而且污染环境,这是废塑料作为高炉燃料利用的一大难题。为此,NKK公司与氯乙烯环境对策协议会及塑料处理促进会联合对废塑料在高炉上的有效利用课题共同进行研究开发。已在京浜钢铁厂建成示范规模的试验设备,从1997年8月到1998年7月用1年时间进行试验,主要是研究脱氯化氢
Japan NKK company for the first time in the world on October 4, 1996 the industrial waste plastics used as blast furnace raw materials (mainly as a reductant) is expected to use up to 30,000 t this year. Japan produces about 8.8 million tons of waste plastics each year, of which only 25% is effectively used (waste power). Currently, about 100 companies and NKK signed a contract to buy the right to use the technology. However, chlorine (about 15%) in vinyl chloride has a corrosive effect on ironmaking and pollutes the environment, which is a major challenge for using waste plastics as a fuel for blast furnaces. To this end, NKK Corporation and the Chlorine Environmental Solutions Council and the Plastics Processing Association will jointly promote the effective utilization of waste plastics in blast furnace research and development. A demonstration scale pilot plant has been constructed at the Keihin Steel Works. From August 1997 to July 1998, it was tested for one year, mainly to study dehydrochlorination