Abstract: A furnace for treating granular activated carbon comprises a single vertical column having a pair of electrodes arranged at vertically spaced locations within the column. The electrodes extend across the column and are so constructed that the particulate material can pass with ease through the electrodes. Suitable connectors connect the electrodes to a source of rectified three phase electric power. Pointed prongs are provided below the upper electrode. A valve controls the outlet from the column so that the furnace can operate continuously. A central cone is provided above the outlet to control the flow of granular carbon down the column.

Abstract: The invention relates to an apparatus for the regeneration of active carbon comprising particularly:a hopper for introducing the active carbon;a reactor (7) delimited by an elongated shaped sheath;a continuous Archimedes screw (10) situated inside the reactor to transport the active carbon to be regenerated;structure for heating by resistances (8), arranged inside the sheath of the reactor;structure situated above the unload end of the reactor (19) and in communication with the reactor, particularly for removing the gases;a coffer into which the Arichmedes screw unloads;structure for communication with the reactor and situated on the one hand close to the input of the reactor and on the other hand along the reactor to regulate the pressure inside the reactor and to inject steam.This apparatus for regenerating active carbon enables the powder active carbon to be regenerated efficiently.

Abstract: The method of the invention concerns continuous graphitization of long pre-cooked carbon-containing products.It comprises displacing the carbon-containing products in a column, along a horizontal axis of passage, inside a furnace where the packing is a fragmented carbon-containing material which is not displaced within the furnace. The column is put under stress by rams and is heated by the Joule effect.The method can be applied particularly to the production of graphite electrodes for arc furnaces in steel works.