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Automobile Shredder Residue (ASR) is composed of many kinds of combustible substances but contains a few quantities of copper, which is considered to be a catalyst of dioxins when it is incinerated with chlorine. In this study, a dry tower mill and an electrostatic separator were used to carry out the experiments on the reducing of copper from the agglomerated light ASR materials. It was found that the products after agglomerating the light ASR materials (RDF) could be easily comminuted with 20 kg of steel balls for 20 minutes and the weight percentage of the fraction of −1 mm reached 66.0% at 200 r.p.m while it was very hard to comminute the light ASR materials themselves. Moreover the content of copper in the comminuted product could be reduced from 2.25% to 0.17% by electrostatic separation although the content of other metals such as zinc, lead and aluminum could not be reduced.

In Japan, the automobile production is increasing from year to year, proportionally to the economic growth. The increase in the number of newly automobiles put into circulation is followed by a larger amount of discarded automobiles. The huge amount of residues generating through this processing is usually dumped on land filling sites. The accumulation of these residues and the shortage of valuable disposal sites may cause some social and environmental problems (soil pollution). To deal with this nuisance, the authors have initiated and developed a processing system for shredded automobile residues on the basis that more than 90% of these residues are combustible materials that could be used as solid fuel: cotton and sponges (40.1%), plastics (30.2%) and rubbers (21.2%). The developed processing system is applied to residues in the range of -80+5 mm. Light materials, mainly cotton and sponges and light plastics in the shredded residues are recovered as float products from the ascending airflow passing through a vertical zig-zag air separator. Then moisture content of light materials is reduced to less than 15% at 450-550 ℃ . Afterward, they are processed into solid fuel through agglomeration. The calorie, ignition loss and weight percentage of chlorine are 5,000 kcal/kg, 36.0%, and 2.0%, respectively.

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