A direct current smelting electric furnace includes a rectifying control circuit, a rectifying power supply device, a short network device, a multi-load layout device including multiple electrodes, and an electric furnace body. The rectifying power supply device includes at least two double-circuit direct current power supply packs. Four output terminals of each double-circuit direct current power supply pack are connected to three electrodes in the multi-load layout device by the short network device to constitute two current circuits by an electric furnace weld pool load. Each electrode in the multi-load layout device is connected to homo-polar output terminals of a three-phase negative semi-cycle rectifying output circuit and a three-phase positive semi-cycle rectifying output circuit, separately. The rectifying power supply device-includes multiple output current circuits. The number of output current circuits of the rectifying power supply device is the same as the number of electrodes in the multi-load layout device.

A direct current smelting electric furnace includes a rectifying control circuit, a rectifying power supply device, a short network device, a multi-load layout device including multiple electrodes, and an electric furnace body. The rectifying power supply device includes at least two double-circuit direct current power supply packs. Four output terminals of each double-circuit direct current power supply pack are connected to three electrodes in the multi-load layout device by the short network device to constitute two current circuits by an electric furnace weld pool load. Each electrode in the multi-load layout device is connected to homo-polar output terminals of a three-phase negative semi-cycle rectifying output circuit and a three-phase positive semi-cycle rectifying output circuit, separately. The rectifying power supply device-includes multiple output current circuits. The number of output current circuits of the rectifying power supply device is the same as the number of electrodes in the multi-load layout device.

The invention relates to a remelting plant comprising a furnace chamber (50), which can be positioned over a crucible (60) of a melting station, an electrode rod (48), which by way of a lead-through (52) can be inserted or is inserted in the furnace chamber (50), in order to contact a consumable electrode (58), and a guide column (30), on which an electrode rod carriage (40) that is fixed-ly connected to the electrode rod (48) is guided in an axially movable manner, in order to move the electrode rod (48) in relation to the furnace chamber (50), and on which a chamber carriage (38), which is connected or can be connected to the furnace chamber (50), is guided in an axially movable manner, in order to move the furnace chamber (50). The guide column (30) is articulatedly connected at a first end to a rotary column (18) such that the guide column (30) can be inclined in re-lation to the rotary column (18) and can be rotated together with the rotary column (18) about the axis of rotation (24) of the rotary column (18). The guide column (30) has in the region of the first end a weighing device (36), which is preferably attached to the rotary column (18).

The invention relates to a remelting plant comprising a furnace chamber (50), which can be positioned over a crucible (60) of a melting station, an electrode rod (48), which by way of a lead-through (52) can be inserted or is inserted in the furnace chamber (50), in order to contact a consumable electrode (58), and a guide column (30), on which an electrode rod carriage (40) that is fixed-ly connected to the electrode rod (48) is guided in an axially movable manner, in order to move the electrode rod (48) in relation to the furnace chamber (50), and on which a chamber carriage (38), which is connected or can be connected to the furnace chamber (50), is guided in an axially movable manner, in order to move the furnace chamber (50). The guide column (30) is articulatedly connected at a first end to a rotary column (18) such that the guide column (30) can be inclined in re-lation to the rotary column (18) and can be rotated together with the rotary column (18) about the axis of rotation (24) of the rotary column (18). The guide column (30) has in the region of the first end a weighing device (36), which is preferably attached to the rotary column (18).

Sensors measure magnetic field components, and the measured fields are used to calculate and estimated transverse position of a longitudinal electric current flowing as an electric discharge across a discharge gap. Based on the estimated position, and according to a selected transverse trajectory or distribution of the estimated discharge position, magnetic fields are applied transversely across the discharge gap so as to control or alter the estimated discharge position. Inventive apparatus and methods can be employed, inter alia, during operation of a vacuum arc furnace.

Sensors measure magnetic field components, and the measured fields are used to calculate and estimated transverse position of a longitudinal electric current flowing as an electric discharge across a discharge gap. Based on the estimated position, and according to a selected transverse trajectory or distribution of the estimated discharge position, magnetic fields are applied transversely across the discharge gap so as to control or alter the estimated discharge position. Inventive apparatus and methods can be employed, inter alia, during operation of a vacuum arc furnace.

Melting furnace (1), in particular for the production of metal alloys by melting alloying constituents, with a melting crucible (10), a cylindrical electrode rod (40) with a consumable electrode (41) attached thereto and a power supply (50) that is configured to supply the electrode (41) with power via the electrode rod (40), wherein the electrode rod (40) can be rotated about its own axis and moved along its own axis during the melting process.

Melting furnace (1), in particular for the production of metal alloys by melting alloying constituents, with a melting crucible (10), a cylindrical electrode rod (40) with a consumable electrode (41) attached thereto and a power supply (50) that is configured to supply the electrode (41) with power via the electrode rod (40), wherein the electrode rod (40) can be rotated about its own axis and moved along its own axis during the melting process.

Method for melting metal material in a melting plant comprising at least an electric furnace having at least a shell into which said metal material is introduced, and feed means to load said metal material into said shell, said method comprising at least a step of loading said metal material into said shell by means of said feed means, a melting step in which said metal material is melted, and a subsequent tapping step in which the molten metal material is tapped.

Method for melting metal material in a melting plant comprising at least an electric furnace having at least a shell into which said metal material is introduced, and feed means to load said metal material into said shell, said method comprising at least a step of loading said metal material into said shell by means of said feed means, a melting step in which said metal material is melted, and a subsequent tapping step in which the molten metal material is tapped.