Abstract:
The magnesium melting furnace (1) has a plurality of chambers. The material to be melted is fed into a melting chamber (2) through a charging chute (20) that dips under the surface of the melting bath. The melt is slowly transferred into a holding chamber (4) through a passage (3) situated in the lower third of a dividing wall (11) above a layer of impurities settling at the bottom (14) of the melting chamber (2). The melt flows slowly through the holding chamber (4), with impurities rising to the surface or settling to the bottom (15). The purified melt flows through a second passage (5) situated in the lower third of a second dividing wall (12) into a metering chamber (6). The melt can be removed from the metering chamber (6) through a transfer pipe (28) using a metering pump (27). The magnesium melting furnace makes it possible simultaneously to melt, purify and remove the magnesium in metered quantities.
Abstract:
A process and an apparatus are disclosed for improved recovery of metal from hot and cold dross, wherein a dross-treating furnace is provided with a filling material with good capacity to store heat. This filling material is preheated to a desired temperature by injection of an oxidizing gas to bum non- recoverable metal remaining in the filling material after tapping of the recoverable metal contained in the dross and discharging of the treatment residue, When dross is treated in such furnace, the heat emanating by conduction from the filling material is sufficient to melt and separate the recoverable metal contained in the dross, without addition of an external heat source, such as fuel or gas burners, plasma torches or electric arcs and without use of any salt fluxes. Furthermore, the recovered metal being in the molten state can be fed to the molten metal holding furnace without cooling the melt; in addition, the non-use of fluxing salt for the treatment means that the non- contaminated residue can be used as a cover for the electrolytic cells in the case of aluminum. In the case of zinc dross, the residue is a valuable zinc oxide by-product very low in contaminants.
Abstract:
The present invention describes an apparatus and a process for in-line substantially continuous degassing of aluminium and/or aluminium alloys, in absence of chlorine and through the injection of at least one metal halide salt that includes a halogen and water and an inert gas, in a transfer trough before casting.
Abstract:
Processing apparatus and methods for introducing material into a molten metal are provided. The material is introduced through a tube, which leads into the molten metal flow between the exit from a chamber and the entry back into a chamber. Increased breaks for material injection and/or better material injection are provided as a result.
Abstract:
A method is provided for processing a liquid metal, particularly steel, to reduce the amount of inclusions therein, wherein a preferably inert gas is bubbled up from the bottom of a vessel (1) through a porous element (3) fitted to the bottom of the vessel, in conjunction with the use of a reactive powder. A vessel for carrying out the method is also provided.
Abstract:
Methods for removing sludge and/or impurities from a molten metal are disclosed herein, as well as sludge removal devices and systems for use in the methods. Sludge removal devices that can reduce the downstream deposition of sludge in certain process components through upstream deposition and subsequent removal from the molten metal are also disclosed.
Abstract:
L'invention concerne un dispositif (1) de traitement d'un flux de métal liquide comprenant une poche de traitement (2) qui comporte des moyens de raccordement (11, 12, 13, 14) à au moins une goulotte d'alimentation (15) en métal liquide et à au moins une goulotte d'évacuation (16) du métal liquide, des moyens d'injection (22, 22a, 22b) d'un gaz de traitement dans le métal liquide disposés dans au moins une paroi latérale (32, 33) de la poche (2) et situés dans la partie amont (23) du compartiment de traitement (20) de la poche (2), et au moins un premier moyen de filtration (40) dans sa partie aval (24). Les moyens d'entrée et de sortie du métal liquide comprennent chacun au moins un orifice (9, 10) qui est positionné de manière à se trouver entièrement sous le niveau (26) du métal liquide lors du traitement, afin d'empêcher l'introduction d'air ambiant dans le compartiment en cours de traitement. Ce dispositif est compact et permet de traiter par voie gazeuse et par filtration un flux de métal liquide circulant dans des goulottes.
Abstract:
A ladle comprising one or more compartments for continuously processing molten metal, e.g. aluminium or alloys thereof, by means of a gas feeding and immersion heating device. Said ladle comprises a plurality of small diameter, high unit power immersion heaters distributed throughout the ladle.
Abstract:
Apparatus for bubbling a gas through molten aluminium defines a "U"-shaped flow path. The gas is admitted at the bottom of one leg of the "U" to flow upwardly through descending metal. An immersion heating element (17) is provided in the descending portion of the flow path and heat is conducted to metal in the ascending portion of the flow path through a baffle (18) which separates the limbs of the "U".
Abstract:
Die vorliegende Erfindung betrifft eine Vorrichtung zur Entgasung einer Stahlschmelze umfassend ein Evakuierungsgefäß (2), eine Gießpfanne (3), einen Einlaufrüssel (4) mit einer darin angeordneten Gasspüleinrichtung (5) und einen Auslaufrüssel (1), wobei der Auslaufrüssel (1) an der Unterkante (9) in radialer Richtung, bezogen auf die Mittenlängsachse (6) des Auslaufrüssels (1), mindestens eine Bohrung (7) aufweist.