Abstract: A device for processing iron alloys in a vessel is described. A reaction chamber for receiving at least one alloying material is arranged in the bottom of the vessel and a sprue of refractory material is arranged concentrically above the reaction chamber to form a gap between the lower end of the sprue and the upper delimitation of the reaction chamber.

Abstract: A gating system for adding an alloying material to a molten base metal in immediate connection with a casting process. The gating system has a runner having an inlet whose cross-sectional area is throttled, a reaction chamber whose sectional area varies along the height of the reaction chamber as a function of the teeming rate, and a pressure and mixing chamber which is connected after the reaction chamber and provided with a partition. This results in a constant alloying material content of the metal being obtained at a varying teeming rate during the casting process.

Abstract: A device for thermal analysis of molten metals comprising two thermocouples is described. It comprises a mould (1) with a spherical cavity (2), the one thermocouple (3) being placed such that it extends over the central portion of the cavity (2), a cylindrical duct (5) which communicates with the cavity (2) and a cylindrical part (7) which communicates with the lower portion of the cavity (2), the other thermocouple (6) being placed in the transition between the cavity (2) and the cylindrical part (7). A process for thermal analysis of molten metals with the aid of the device is also described. The difference in temperature (11) in the temperature/time curve for the thermocouple which is centrally placed and the lower themocouple which is peripherally placed when the solidus temperature determined by means of the centrally placed thermocouple (3) has been reached is used as a measure of the thermal conductivity.