Abstract: The invention relates to a ring furnace (1) having a longitudinal axis and comprising elongated bays (10), a plurality of hollow partitions (3, 3?) arranged within the casing of each bay so as to be parallel to the longitudinal axis, a first end transverse wall (41) located at a first end of each bay (10), a second end transverse wall (42) located at a second end of each bay (10) and possibly one or more intermediate transverse walls (43) located between the first and second ends. The hollow partitions and transverse walls define baking pits (2) within the bays (10) for stacking carbonaceous articles therein. The baking pits have a length Lp and a width Wp, said length Lp being at least 15 times greater than said width Wp.

Abstract: The subject of the invention is an anode block (13, 13a-13e) made of carbon for a pre-baked anode (4) for use in a metal electrolysis cell (1) comprising a higher face (24), a lower face (23), designed to be laid out opposite a higher face of a cathode (9), and four side faces (21,22,34), and including at least one first groove (31a-31e) leading onto at least one of the side faces, in which the first groove has a maximum length Lmax in a plane parallel to the lower face, and characterized in that the first groove does not lead onto said lower or higher faces, or leads onto said lower or higher faces over a length L0 less than half the maximum length Lmax.

Abstract: The subject of the invention is an anode block (13, 13a-13e) made of carbon for a pre-baked anode (4) for use in a metal electrolysis cell (1) comprising a higher face (24), a lower face (23), designed to be laid out opposite a higher face of a cathode (9), and four side faces (21,22,34), and including at least one first groove (31a-31e) leading onto at least one of the side faces, in which the first groove has a maximum length Lmax in a plane parallel to the lower face, and characterized in that the first groove does not lead onto said lower or higher faces, or leads onto said lower or higher faces over a length L0 less than half the maximum length Lmax.

Abstract: The invention relates to ring furnaces of which at least one of the inner partitions is formed by a plurality of bricks made of refractory material including at least a first brick and a second brick placed above or below a third brick and separated from one another by a space of width J, in which the first brick has at least one recess on its assembly face opposite the third brick, the third brick has at least one projection on its assembly face facing the first brick, wherein the projection is inserted into the recess, the dimension E of said recess in the longitudinal direction of the partition is greater than the dimension B of said first projection in the same direction, and said recess is positioned at a determined distance Se from the end face adjacent to said space.

Abstract: The invention relates to a ring furnace (1) having a longitudinal axis and comprising elongated bays (10), a plurality of hollow partitions (3, 3?) arranged within the casing of each bay so as to be parallel to the longitudinal axis, a first end transverse wall (41) located at a first end of each bay (10), a second end transverse wall (42) located at a second end of each bay (10) and possibly one or more intermediate transverse walls (43) located between the first and second ends. The hollow partitions and transverse walls define baking pits (2) within the bays (10) for stacking carbonaceous articles therein. The baking pits have a length Lp and a width Wp, said length Lp being at least 15 times greater than said width Wp.

Abstract: The invention relates to ring furnaces of which at least one of the inner partitions is formed by a plurality of bricks made of refractory material including at least a first brick (15a) and a second brick (15b) placed above or below a third brick (15c) and separated from one another by a space (13, 14) of width J, in which the first brick (15a) has at least one recess (158d, 158?d) on its assembly face opposite the third brick (15c), the third brick (15c) has at least one projection (155d, 155?d) on its assembly face facing the first brick (15a), wherein the projection is inserted into the recess, the dimension E of said recess (158d) in the longitudinal direction of the partition is greater than the dimension B of said first projection (155d) in the same direction, and said recess (158d) is positioned at a determined distance Se from the end face (152) adjacent to said space (13, 14).

Abstract: A process for continuous production of a carbonaceous paste in which at least one carbonaceous aggregate and a cokable binder are introduced continuously into a kneader having an upstream end, a downstream end, and a rotating shaft associated with kneading elements. During the kneading operation, the paste, is passed from the upstream end to the downstream end of the kneader and is heated in the upstream end of the kneader. Water is injected into the paste in the downstream end of the kneader, causing a reduction in temperature of the paste and vaporization of the water, which is subsequently discharged from an orifice in the kneader. The paste reduced in temperature to a shaping temperature is continuously discharged from the downstream end of the kneader.

Abstract: The invention relates to a method for the individual marking of precooked anodes used in the production of aluminum by electrolysis in the Hall-Heroult process, and to the anodes produced thereby. These anodes are produced by hot compaction of a carbonaceous paste, and according to the invention, during or immediately after such compaction, a plurality of impressions is formed in the upper part of each anode. The impressions are depressions and/or relief portions, constitute a digital coding for the identification number of each anode, and remain legible until withdrawal of the components of the butt of the worn anode from the electrolysis tank. The marking can be carried out using a binary or ternary code, where the reference plane of the zone of the anode which carries the marking corresponds to a first digit, with other digits corresponding to depressions of a particular depth, depressions of a greater depth, or relief portions.