Converting paper mill sludge or the like

Details Converting paper mill sludge or the like Converting paper mill sludge or the like

F - Mech Eng,Light,Heat,Weapons

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F23G 5/32 (2006.01) B09B 3/00 (2006.01) C03B 3/02 (2006.01) C03B 5/00 (2006.01) C03B 5/12 (2006.01) F23G 5/08 (2006.01) F23G 5/12 (2006.01) F23G 7/04 (2006.01)

Patent

CA 2197229

Paper mill sludge or similiar organic sludges with a high ash content are converted by burning the sludge in a cyclone furnace (10) along with another source of fuel. The heat content of the sludge is recovered and the ash content of the sludge is converted to a glassy slag. A flux, such as limestone, may be added to the sludge before introduction into the cyclone furnace (10). The slag is useful as a construction material, an abrasive, for roofing products, or for other purposes.

Boues de l'industrie papetière ou boues organiques de nature similaire à forte teneur en cendres transformées par calcination dans un four cyclone en présence d'une une autre sorte de combustible. On récupère ainsi le contenu calorifique des boues tandis que les cendres sont transformées en scories vitreuses. On peut ajouter aux boues un fondant tel que de la chaux avant leur introduction dans le four. Les scories peuvent servir de matériaux de construction, d'abrasif, de matériaux de recouvrement, etc..

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