Method for treating spent pot liner

A - Human Necessities – 62 – D

Patent

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A62D 3/19 (2007.01)

Patent

CA 2681761

The present invention relates to a method for treating spent pot liner material (SPL) containing carbon and/or an inorganic material, the method comprising: providing a plasma furnace having first and second electrodes for generating plasma and a crucible having a non-electrically conductive inner surface, heating the SPL material in the crucible in the presence of a flux material and an oxidant by passing an arc between the first and second electrodes via the SPL material to form a molten slag material and convert at least some of the carbon in the SPL material to CO and/or CO2 and/or incorporate at least some of the inorganic material into the molten slag material.

La présente invention porte sur un procédé pour traiter un matériau de garnisseur de creusets usé (SPL) contenant du carbone et/ou une matière inorganique. Le procédé comprend les opérations consistant à : prendre un four à plasma ayant des première et seconde électrodes pour générer un plasma et un creuset ayant une surface interne non conductrice de l'électricité, chauffer le matériau SPL dans le creuset en présence d'un matériau de fondant et d'un oxydant en faisant passer un arc entre les première et seconde électrodes par l'intermédiaire du matériau SPL pour former un matériau de laitier fondu et convertir au moins une partie du carbone dans le matériau SPL en CO et/ou CO2 et/ou incorporer au moins une partie de la matière inorganique dans le matériau de laitier fondu.

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