An electrode seal for use in a metallurgical furnace, the furnace comprising a furnace space heated by electrodes extending through an aperture into the furnace space. The electrode seal comprises at least three sets of shoes in consecutive lateral contact, each shoe having a biasing member for biasing a surface of the shoe toward one of the electrodes thereby allowing the one electrode to longitudinally move within the electrode seal while providing electrical insulation between the electrode and the aperture.

An electrode seal for use in a metallurgical furnace, the furnace comprising a furnace space heated by electrodes extending through an aperture into the furnace space. The electrode seal comprises at least three sets of shoes in consecutive lateral contact, each shoe having a biasing member for biasing a surface of the shoe toward one of the electrodes thereby allowing the one electrode to longitudinally move within the electrode seal while providing electrical insulation between the electrode and the aperture.

An enclosure of a steel-making furnace system includes a support structure including a frame that defines an interior, a supply line for supplying a cooling liquid from a reservoir, and a return line fluidly coupled to the supply line and the reservoir. A plurality of panels includes sinuously winding piping having an inlet and an outlet. The inlet is fluidly coupled to the supply line and the outlet is fluidly coupled to the return line. The frame includes a plurality of support members spaced from one another, where each of the plurality of support members defines a slot. Each of the plurality of panels is removably and slidably received with the slot for coupling to the frame.

An electrode seal for use in a metallurgical furnace, the furnace comprising a furnace space heated by electrodes extending through an aperture into the furnace space. The electrode seal comprises at least three sets of shoes in consecutive lateral contact, each shoe having a biasing member for biasing a surface of the shoe toward one of the electrodes thereby allowing the one electrode to longitudinally move within the electrode seal while providing electrical insulation between the electrode and the aperture.

A non-linear load in the form of an arc furnace with an upstream furnace transformer is supplied with electric power from a power supply device with a plurality of converter units. The converter units have a plurality of main modules with inputs connected to a respective phase of a three-phase grid. The converter units have a common star point between the main modules and the primary side of the furnace transformer. Each main module has a series circuit with a coupling inductance and a plurality of submodules. The submodules have a bridge circuit with four self-commutated semiconductor switches and a bridge path with a storage capacitor between input and output. The semiconductor switches of the submodules can each be switched independently of the semiconductor switches of the other submodules of the same main module and of the other main modules.

An electric power apparatus for an electric arc furnace comprises at least one electrode and is connectable to a power network to supply to the electrode the electric energy to generate an electric arc to melt a metal mass. The apparatus comprises an electric regulation unit interposed and connected to the power network and to the electrode and configured to regulate at least one electric quantity for powering the electrode. The apparatus comprises at least one detection device to detect the electric quantity, interposed between the electrode and the electric regulation unit, a positioning device to move the at least one electrode nearer to/away from the metal mass to be melted and a control and command unit.

An electrode seal for use in a metallurgical furnace, the furnace comprising a furnace space heated by electrodes extending through an aperture into the furnace space. The electrode seal comprises at least three sets of shoes in consecutive lateral contact, each shoe having a biasing member for biasing a surface of the shoe toward one of the electrodes thereby allowing the one electrode to longitudinally move within the electrode seal while providing electrical insulation between the electrode and the aperture.

Provided is a power supply system for arc furnace and a method for controlling the same, and an arc furnace facility having a power supply system, the power supply system includes a power converter, and a polyphase transformer, a first disconnecting means connecting an input of the power converter to a primary circuit of the transformer, and a second disconnecting means connecting an output of the power converter to the primary circuit of the transformer, the power supply system also includes a first isolation switch and a second isolation switch, and a control circuit.

A DC arc furnace 10 comprises a vessel 12 comprising a roof 14, a base 16 and a sidewall 18. The vessel defines a chamber 20 for a body of material having an upper surface 44. An anode electrode 24 and a cathode electrode 26 extend parallel to one another and terminate a distance d from the upper surface. The anode and cathode are located on a first horizontal line 28 and define a gap between them. A first conductor 36 links a positive pole 32 to the anode and a second conductor 38 links a negative pole to the cathode. The first conductor comprises a first section 36.1 extending continuously underneath the base parallel to the first line, so that current flows in the first section in a direction A directly opposite to current flow B through the body of material between the anode and the cathode.

An electrode clamping device and a power transmission vehicle. The electrode clamping device includes a first supporting frame; at least one electrode clamp for clamping a graphite electrode; and a flexible connecting piece for suspending the electrode clamp under the first supporting frame; the electrode clamp is connected with the first supporting frame through a flexible connecting piece. The flexible connecting piece can make the electrode clamp adjust adaptively with the change of the position and deformation of the graphite electrode, so as to adapt to the complex deformation of the displacement and deflection of the graphite electrode in different directions and degrees, and the connection between the electrode clamp and the graphite electrode is stable and reliable. In addition, only one part of the flexible connecting piece is used to realize the self-adaptive function of the electrode clamp, and the structure is simple and reliable.