Method for incinerating carbon-containing dry metallic ash

Abstract

The invention relates to a method for incinerating carbon-containing dry metallic ash and a pertinent device. The method comprises the steps of p) adding the metallic ash into a trough; q) aerating with ambient air from above, and concurrently, at least for part of the time, r) injecting air and/or oxygen through the trough hearth; s) establishing the ignition temperature; t) stirring of the metallic ash by means of a suitable tool; u) whereby the carbon content is reduced to less than 3%; and whereby steps b), c), and d) can proceed concurrently or in alternating order or pairs or all of these steps can proceed concurrently; step d) can just as well proceed selectively in partial quantities of the metallic ash; and whereby the reverse transport of ash through the trough hearth is prevented, whereas the supply of air and/or oxygen is maintained.

We claim: 
     
         1 . A method for incinerating carbon-containing dry metallic ash, the method comprising the steps of:
 a) adding the metallic ash into a trough;   b) aerating from above with ambient air;   c) injecting air and/or oxygen through a hearth of the trough;   d) establishing an ignition temperature;   e) stirring of the metallic ash by means of a suitable tool;   f) whereby a carbon content of the metallic ash is reduced to less than 3%; and   whereby steps b), c), and d) can proceed concurrently or in alternating order or pairs or all of these steps can proceed concurrently; and   steps b) and c) proceed concurrently, at least for part of the time;   step d) can just as well proceed selectively in partial quantities of the metallic ash   wherein a reverse transport of metallic ash through the hearth of the trough is prevented, whereas the supply of air and/or oxygen is maintained.   
     
     
         2 . A device, for implementing the method according to  claim 1 , comprising
 g) a trough (a 1 )   h) having a level hearth (b 2 ),   i) whereby hearth (b 2 ) comprises openings (c 3 ),   j) with metal fibers (d 4 ) being arranged below hearth (b 2 ) and forming a space (d 4   a ), which is closed in downward direction through   k) another trough hearth (e 5 ) that is arranged parallel to hearth (b 2 )   l) having further openings (f 6 ) that are arranged at an offset from said openings (c 3 ), whereby   m) hearth (e 5 ) and hearth (b 2 ) are connected by means of connecting means (g 7 ) in such manner that metal fibres (d 4 ) are firmly occluded, and   n) a space (h 8 ) is provided below hearth (e 5 ) to which   o) means (i 9 ) for supplying air or oxygen are provided.   
     
     
         3 . A device according to  claim 2 , the device comprising:
 j) flow guides for optimising air circulation are provided in space (h 8 ).   
     
     
         4 . A device according to  claim 2 , wherein
 the metal fibers (d 4 ) are present as woven material, fabric, fleece or knitted material.