| 摘要 |
<p>Apparatus includes a kiln (10) through the chamber (12) of which is passed a flow of scrap material, e.g. aluminium can scrap, for heat processing e.g. removal of lacquer and other contaminants, and gas circulation means having a heater (40) providing inflow of hot gases to the kiln, an outlet flue (32) leading off exhaust gases from the kiln with recirculation of at least part of the latter gases to the inflow, and a fan (36) or other flow inducing means for effecting circulation, preferably by suction with respect to the kiln, with flow through the latter in the opposite direction to the feed of material, and at least a temperature sensor (TI) at the material input end of the kiln for automatic regulation of the throughput of gases to regulate the kiln temperature.</p> |
