Abstract: A copper mold or copper mold plate and also a process for reconditioning such worn molds or mold plates, which are used for the continuous casting of metals or metal alloys is provided. An electrolytically applied copper coating is provided on the inner wall of the mold or on that side of the mold plate which faces toward the casting strand.

Abstract: A grinding wheel has an inner core part and an outer annular grinding part connected the inner core part. The outer grinding part is made of a granular abrasive medium and plastic or glass fibers. The fibers form between 0.15% and 1%, preferably 0.2% to 0.4%, by weight of the grinding part.

Abstract: A continuous-casting mold has an inner mold tube having a plurality of side walls formed with coolant passages and a plurality of profiles extending longitudinally on each of the side walls and each formed with a respective plurality of longitudinally spaced undercut grooves. An outer jacket surrounds the mold tube. Respective connectors each have a base generally complementarily fitting in a respective one of the grooves and a tubular and internally threaded body projecting outward from the respective base. Respective screws engage from outside through the jacket into the bodies.

Abstract: A copper mold or copper mold plate and also a process for reconditioning such worn molds or mold plates, which are used for the continuous casting of metals or metal alloys is provided. An electrolytically applied copper coating is provided on the inner wall of the mold or on that side of the mold plate which faces toward the casting strand.

Abstract: The invention relates to a process for producing binderless briquettes from metal chips and metal dusts in which the metal chips are pressed into a cup-shaped form and the upwardly open cavity produced as a result is filled with metal dust, after which the opening is closed with a cover consisting of pressed metal chips.

Abstract: The invention relates to a process for producing binderless briquettes from metal chips and metal dusts in which the metal chips are pressed into a cup-shaped form and the upwardly open cavity produced as a result is filled with metal dust, after which the opening is closed with a cover consisting of pressed metal chips.

Abstract: The invention relates to a flame burner having a nozzle (10) disposed in a head, wherein in addition to annularly disposed gas supply channels (11) the nozzle has a central gas supply opening (12), which has a laval nozzle-like region and a stabilizing region having a consistent diameter connected thereto in the flow direction. In order to flame burn a metallic surface the oxygen gas guided through a central nozzle of a flame burner is incited to oscillate in such a manner, such that a pulsating oxygen flow exiting the nozzle mouth is formed at the speed of sound, or at supersonic speed.

Abstract: The invention relates to a gas burner nozzle for flame work, with a central oxygen supply consisting of several pipes (13) and with several pipes (11, 12) arranged around the aforementioned oxygen supply for the supply of fuel gas. According to the invention, the pipes for the oxygen supply are arranged in groups, with the individual groups arranged coaxially and at a distance from each other, and with each group consisting of at least two rows of pipes arranged in the form of concentric rings.

Abstract: Alloying and/or reducing powder is pumped directly into the steel melt at a pressure of at least 20 bar, preferably at least 40 bar, with at most 20% of a fluidizing agent and the powder is discharged from the delivery line by a plunger extending across the cross section thereof.