VERFAHREN ZUR ABFALLVERARBEITUNG SOWIE DREHOFEN FÜR DIESEN ZWECK.

摘要

PCT No. PCT/AU87/00338 Sec. 371 Date May 20, 1988 Sec. 102(e) Date May 20, 1988 PCT Filed Oct. 2, 1987 PCT Pub. No. WO88/02284 PCT Pub. Date Apr. 7, 1988.Method and apparatus for treating waste materials to produce aggregates wherein pellets comprised of a mixture of solids, liquid wastes and clay are dried by hot air in a dryer. The pellets are then fed to the pyrolysis zone of a rotary kiln wherein they are heated by hot gas from an oxidation zone of the kiln to drive off most of the volatile gases. Remaining volatile gases and the fixed carbon in the waste are oxidized in the oxidation zone, and the silicates in the clay are vitrified in a vitrification zone of the kiln to produce aggregates which are crushed and screened. Volatile gases given off from the pyrolysis zone are mixed with exhaust gases from the dryer to feed the burner for the vitrification zone and to supply oxygen to the oxidation zone.