| 摘要 |
A machine for recycling old road metal comprises a cylindrical barrel (18) rotated about an axis inclined at a small-angle to the horizontal, the barrel (18) having internal flights (34) extending parallel to its axis, the flights (34) being spaced from the band wall by a distance D. Thus road metal lumps fed into one end (26) are rotated and tumbled in passing to the opposite end and the discharge opening (42), the tumbling breaking down the lumps until they are of sufficient size to slide between the flights (34) and the barrel wall and so be discharged. A burner (28 Fig. 1) fires into the material inlet end (26) of the barrel (18) to heat the aggregate as it passes along the barrel and flame and gas are exhausted at the opposite end of the barrel preferably through a vortex extractor system (70,72). <IMAGE>
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