C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
C22B 7/02 (2006.01) F27B 3/08 (2006.01)
Patent
CA 2133328
Abstract The invention is directed to a method for processing free-flowing materials, in particular filter dust from industrial metallurgical waste and domestic waste incineration plants, and to a device for carrying out this method. In order to ensure that the end product can be reused or can be disposed of in an environmentally sound manner, the following steps are carried out: the free-flowing material is mixed in the dry state with a reducing agent; the mixture is inserted through the bore of at least one hollow electrode in a metallurgical vessel, the electrode being immersed in the slag located in the vessel, and is applied to the surface of the slag and injected into the molten slag pneumatically; heat is supplied to the mixture during the reaction between the mixture and the slag; evaporating components in the mixture are sucked out above the surface of the slag; components sinking into the slag are tapped together with the slag and the remaining components of the mixture remain in the slag and are discharged along with the slag. The bore of the hollow electrode is connected with a device (50) for feeding and discharging gaseous media. The power supply (30) has elements for maintaining constant current (36) and for regulating the electrical output (37). (Fig 1)
Konig Heribert
Rath Gero
Richter Wolfgang
Staubner Hermann
Fetherstonhaugh & Co.
Mannesmann Ag
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