The Japan Iron & Steel Federation,as its voluntary energy-saving action plan,proposed a 10% energy reduction by 2010 with 1990 as the basis.Further,it has put forward an additional 1.5% energy saving by the use of waste plastics as a metallurgical raw material.Coke-making process is considered to be a promising area to which the thermal decomposition of waste plastics is applicable because the process involves coal carbonization in a high-temperature,reducing atmosphere.To evaluate the conversion rate of various waste plastics using coke ovens after carbonization,laboratory tests and actual coke oven tests were conducted.As a result,the yield of coke,gas,tar and light oil was 20%,40% and 40%.And it was found that the 1% addition of waste plastics in raw coal did not deteriorate the coke strength.Waste plastics recycling process using coke ovens started at Nippon Steel Nagoya
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