Treatment of waste and a rotary kiln therefor

Details Treatment of waste and a rotary kiln therefor Treatment of waste and a rotary kiln therefor

B - Operations, Transporting

09

B

39/118, 39/26

B09B 3/00 (2006.01) C02F 9/00 (2006.01) C02F 11/00 (2006.01) C02F 11/06 (2006.01) C02F 11/10 (2006.01) C02F 11/12 (2006.01) C03B 1/02 (2006.01) C04B 5/00 (2006.01) C04B 18/02 (2006.01) C10B 53/00 (2006.01) F23G 5/02 (2006.01) F23G 5/027 (2006.01) F27B 7/02 (2006.01) F27B 7/04 (2006.01) F27B 7/30 (2006.01) F27D 9/00 (2006.01)

Patent

CA 1312198

ABSTRACT A method of treatment of waste materials to produce aggregates where pellets of solid/liquid waste/ clay mixture are dried by the counter-current flow of hot air (from an aggregate cooler (59)) in a dryer (29). The pellets are fed to the pyrolysis zone (47) of a rotary kiln (31) and are heated by hot gas from an oxidation zone (52) to drive off most of the volatile gases in the waste. The remaining volatile gases and the fixed carbon in the waste are oxidized in the oxidation zone (52) of the kiln (31) and the silicates in the clay are are vitrified in a vitrification zone (53) of the kiln (31) to produce aggregates which are crushed and screened. The volatile gases given off from the waste in the pyrolysis zone (47) is mixed with the exhaust gases from the dryer (29) to feed the burner (61) for the vitrification zone (53) and to supply oxygen via a pipe (62) to the oxidation zone (52).

548529

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