コールタール熱媒浴法によるシュレッダーダスト処理技術の開発

概要

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An automobile shredder residue (ASR) is an unavoidable by-product in the recycling of end-of-life vehicle (ELV). A new recycling process of ASR has been developed, in which ASR is put in coal-tar based oil and is separated by gravity into plastic floats and metal sediments. The fundamental experiments and bench scale test were carried out so as to confirm the separation behavior of ASR. The decomposition of polyurethane and dechlornation of polyvinyl chloride included in ASR proceeded rapidly under the conditions of 280℃ and 15 min in coaltar based oil, compared with in a gas phase owing to a large heat capacity and a high thermal conductivity of the liquid solvent. From the operation results of 1200t/y pilot plant, the floats of 73% and sediments of 27% from ASR were recovered during 50 hours continuous operation. The floats composed of plastics free from copper and less of chlorine is suitable for reducing agent in blast furnace, and the sediments containing high contents of metals can be used for raw material in smelting. On the basis of above results, it is concluded that the ELV recycling of 95% or more can be achieved by using the proposal process.
社団法人日本鉄鋼協会の論文