Abstract: A moveable graphitizing furnace to graphitize several columns of electrodes at the same time in two side by side tanks. The furnace has a metallic cage construction and a covering of firebricks arranged at sight on said cage construction and self-compensating the thermic expansion and the thrust exerted from outside on each column of electrodes to be graphitized. The furnace is further provided with screens protecting the framework and the wheels from heat, air forced cooling system to cool the bottom of the tanks, as well as water circulation cooling system to cool the bus bar electrodes also during the movement of the furnace after the graphitizing process.

Abstract: A unit for regenerating the heat produced by exhaust gases in movable hearth baking furnaces not altering the operating conditions of the furnace and not causing any damage thereto, either obtaining steam or heating at high temperature diathermic oil to be used for heating the mixtures intended to be used for preparing carbonaceous articles, which unit comprises: a side inlet mounted on the smokestack and provided with an on-off valve and a sector valve placed at the outlet of the smokestack; an exhauster; a control logic; a pressure adjuster; and, a temperature adjuster associated to a heat regenerator of a known type.

Abstract: An automatic control system for a continuous ring furnace, wherein the chambers and groups of chambers are operated successively in different phases of the baking cycle; the condition of certain chambers being monitored to obtain signals representing actual parameters and the signals being fed to a computer for comparison to optimum values and correction of any observed deviations therefrom.

Abstract: A smoke conducting apparatus for use particularly with continuous ring furnaces (e.g., Hoffman furnaces) wherein each furnace chamber is connected to the smoke channel, the latter being a metal pipe inclined slightly from horizontal and provided with one or more traps along the length of its bottom surface, each trap containing a removable receptacle, and heating means being disposed along the bottom of the channel to fluidize tarry deposits of combustion products so that such deposits will flow by gravity into the removable receptacle.

Abstract: The invention provides improvements in continuous ring furnaces which have sequentially arranged and communicating chambers and which are used for baking and rebaking carbon articles, wherein a movable bridge member is employed to connect a common smoke channel with a first chamber, so as to draw a portion of smoke flowing through said smoke channel and recycle the same through the furnace.