| 摘要 |
A method for recovering a fuel substance by separating materials in a salvage operation based on BTU content is provided. A non-sorted material stream including metallic and non-metallic components, which preferably includes automobile scrap, is fed to a shredder which shreds or fragments the materials. After shredding, the non-sorted material stream is separated by a series of separators. The non-sorted material stream is first conveyed to a gravity separator where the materials are separated into two streams, namely, a heavy material stream and a light material stream. The heavy material stream is then conveyed to a magnetic separator where ferrous metals are separated from a number of non-ferrous materials. The heavy ferrous metals are collected for recycling whereas the heavy non-ferrous materials are conveyed to a screen and further separated into non-ferrous metal and non-metallic material. The light material stream is passed under a cross belt magnetic separator where the light ferrous metals are separated out. The remaining light material stream is then conveyed to a rotary trommel which separates the light material stream into two fractions based on size. The fine material separated by the trommel has been relatively inert during processing. The coarse material from the trommel is further separated to remove non-ferrous metal material. The remaining coarse material has a high BTU content, and can be utilized as fuel substance.
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