Batchwise working-up recycling materials in a rotatable reactor

C - Chemistry – Metallurgy – 22 – B

Patent

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C22B 1/02 (2006.01)

Patent

CA 2507673

A process for batchwise working-up valuable metals containing recycling materials having a content of organic constituents so high that its use as smelting materials in conventional metal smelting processes is not suitably or even possible. The material is charged to a tiltable reactor rotatable along its own longitudinal axis having a common opening for charging and emptying. The material is heated to a temperature promoting the expulsion of organic constituents by pyrolysis and/or combustion. The material consists at least to a substantial part of such size fractions that admits a continuous charging during operation. In the process, said material during operation is charged continuously in an adjustable stream being controlled and/or adjusted by means of running measurements of different process variables so that the flow and composition of the combustible gas and the heat release is kept under control. A worked-up product substantially free from any organic substance is withdrawn from the reactor and is added to a conventional metal smelting process. The material is suitably supplied during operation by means of a charging equipment provided against or down through the single opening of the reactor by means of gravity and/or a pneumatic transport gas.

Un procédé de transformation par groupage de métaux précieux contenant des constituants organiques ayant une teneur si élevée que leur utilisation comme matériaux de fusion dans des processus de fusion de métal conventionnels n'est pas convenable ou même possible. Le matériau est chargé dans un réacteur inclinable pouvant tourner le long de son propre axe longitudinal ayant une ouverture commune pour charger et vider. Le matériau est chauffé à une température favorisant la séparation de constituants organiques par pyrolyse et/ou combustion. Le matériau est constitué au moins d'une partie substantielle de ces fractions de taille qui admettent un chargement continu pendant le fonctionnement. Dans le procédé, ledit matériau en cours de fonctionnement est chargé en continu dans un flux réglable qui est commandéet/ou réglé par des moyens de mise en oeuvre de mesures de différents processus variables de sorte que le flux et la composition du gaz combustible et de la libération de chaleur soient maintenus sous contrôle. Un produit travaillé sensiblement exempt de toute substance organique est retiré du réacteur, puis ajouté à un procédé de fusion de métal conventionnel. Le matériau est alimenté de manière appropriée, lors du fonctionnement, au moyen d'un équipement de charge disposé contre ou vers le bas à travers la seule ouverture du réacteur sous l'effet de la gravité et/ou d'un gaz de transport pneumatique.

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