Process for melting down combustion residues in slag

Details Process for melting down combustion residues in slag Process for melting down combustion residues in slag

F - Mech Eng,Light,Heat,Weapons

23

G

F23G 5/027 (2006.01) F23G 5/00 (2006.01)

Patent

CA 2108677

Instead of a complete incineration of waste, such as has hitherto been sought, firstly in a low temperature unit there is only a carbonization of the process material and sub- sequently concomitantly using carbonization materials or gases in a high temperature unit the temperatures necessary for melting the slag and complete combustion are obtained. In this way extraneous materials, heavy metals are received in the slag and can be permanently bound in. The conventional combustion zone is replaced by a generator for producing flammable carbonization gases, so that instead of an incinera- tion there is only a gasification of the charge. The gasification or carbonization can be randomly controlled. The residues left behind from carbonization contain more combustion energy than conventional, burnt-out residues and can be supplied to a slag fluidization process in the high temperature unit - a revolving cylindrical furnace being proposed here. The end product is completely burnt-out, fluidized slag, which can be left to solidify in random form.

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