F - Mech Eng,Light,Heat,Weapons – 23 – G
Patent
F - Mech Eng,Light,Heat,Weapons
23
G
110/2
F23G 5/00 (2006.01) B09B 3/00 (2006.01) F23G 5/08 (2006.01) F23G 5/32 (2006.01)
Patent
CA 2008488
A b s t r a c t A process of transferring environmentally harmful sub- stances which are easily leachable from openly deposed waste material, and which to a large proportion consists of inorganic material, such as spent spot linings for aluminium electrolysis cells, into gaseous form or into leach stable compounds, comprises that the material in finely ground form is heated and in that reagents such as silica, water and oxygen are added in a cyclone furnace (1) comprising a heat source (2) for example a plasmagenerator, and a cylindrical furnace vessel (10). By feeding the waste ma- terial and the reagents via a mixing and prereaction chamber (3) which is located between the high temperature source and the vessel (10), a very high proportion of the added materials are reacted in the furnace. A device for carrying the process into effect comprises a cyclone furnace (1) having a high plasma generated (2) tangentially connected to the horisontally arranged cylindrical vessel (1), at one end portion thereof, via a mixing and prereaction chamber (3) into which the waste material and the reagents are injected and super heated before they flow into the furnace vessel (10). At the other end portion of the vessel (10) there is an upper outlet for drawing off formed gaseous material, and a lower outlet (4) for drawing off formed solid and/or liquid material.
Marks & Clerk
Skf Plasma Technologies Ab
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