Abstract: In a method of melting metal of a predetermined liquidus temperature, particularly a non-iron metal, such as magnesium, in a heated melting chamber into which solid metal is introduced and where a stream is generated, the parameters of flow are chosen such that the melting time is, in maximum, half the melting time without this stream under the condition that the temperature of the molten metal, when measured at at least one place in a distance of 5 mm in maximum from the solid metal, does not fall below liquidus temperature. To this end, an apparatus may be provided comprising at least one pump in a melting chamber having an associated heating device. This pump sucks the melt through at least one inlet opening and discharges the melt through at least one outlet opening. Both inlet opening and outlet opening are arranged within the melt bath of the melting chamber.

Abstract: A melt withdrawal device for melt furnaces for charging casting machines has a melt conveying pump (1) comprised of a pump tube (2) forming a lower melt inlet (3) and an upper melt outlet (4) and of a pump shaft (5) extending inside the pump tube (2) and carrying a pump rotor (6). To achieve a melt conveyance which is largely independent of the melt level variations inside the melt furnace and can thus be dosed property, a charging means (7) for keeping constant the pump head (h) is provided before the melt conveying pump (1), which charging means (7) comprises a charging tank (8) accommodating the pump tube (2) with the melt inlet (3) and a charging pump (10) capable of filling the charging tank (8) with melt up to a melt overflow (9) determining the charging height, where the delivery rate of the charging pump (10) exceeds that of the conveying pump (1).

Abstract: For charging casting machines with non-ferrous molten metals, melt (S) is supplied from a withdrawal chamber (6) of a melting furnace (1) having a gas atmosphere to the filling hole (18) of a casting machine. To achieve an economic, easily dosable charging of the melt, the metered melt (S) is pumped up inside the withdrawal chamer (6) via a metering pump (12) and is drained towards the filling hole (18) via a discharge pipe (15) extending through the furnace wall, where through inlet nozzles (11) opening into the withdrawal chamber (6) a pulsed supply of gas to the withdrawal chamber (6) is effected to support the melt flow.

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), one end of which terminates 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 slowly flows through the holding chamber (4), with impurities rising to the surface or settling on 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 (1) makes it possible to simultaneously melt, purify and remove the magnesium in metered quantities.

Abstract: A worm pump for delivering a metal melt comprises a mounting flange, and a tubular pump housing mounted on, and suspended from, the mounting flange, the pump housing defining a lower inlet for receiving the metal melt and an upper outlet for delivering the metal melt. A drive motor is mounted on the mounting flange, the drive motor having a pump shaft extending into the tubular pump housing and comprising a conveyor screw between the inlet and outlet. A guide supports the pump shaft at a lower end thereof, and a universal joint is provided at an upper end of the pump shaft above the upper outlet, the universal joint permitting the pump shaft to pivot and the guide being arranged to support the pump shaft during a pivoting motion.

Abstract: A two-chamber furnace for delivering a melt to a casting machine comprises a storage chamber having an inlet device for material to be melted, a removal chamber having an outlet device for removing the melted material, and an intermediate chamber arranged between the storage chamber and the removal chamber, the intermediate chamber communicating with the removal chamber through a balancing port and with the storage chamber by an overflow. A control device controls the level of the melted material in the removal chamber, the control device including a pump for moving the melted material from the storage chamber to the intermediate chamber.