A glass-melting electrode has a cooling device. The glass-melting electrode has an electrode body with a blind hole, and the cooling device has a cooling tube which can be inserted into the blind hole in order to feed coolant into the blind hole. The cooling device has a flow distributor with at least three outlet openings. The flow distributor is arranged at an end of the cooling tube which has been inserted into the blind hole, such that coolant flows through the flow distributor into the blind hole.

A system including a graphite electrode having a graphite body with first and second opposed ends. The electrode further includes a threaded connector positioned at one of the first or second ends, and a tag coupled to or positioned in the threaded connector, wherein the tag is configured to transmit a signal including information relating to the electrode.

A thermal energy storage system includes a firebrick checkerwork and an electrode. The firebrick checkerwork includes one or more conductive firebrick layers, each including a plurality of electrically conductive doped metal oxide firebricks with one or more airflow vents. The electrode includes one or more electrode firebrick layers, each layer including a plurality of electrode firebricks. The firebrick checkerwork is heated due to application of electrical power to the electrode. Air flowing through the firebrick checkerwork may then be heated for use in heat-related applications (e.g., an industrial application, commercial application, residential application, transportation application, etc.) some of which may relate to electricity production or in other applications which may relate to other purposes that require heat that are unrelated to electricity production.

A thermal energy storage system includes a firebrick checkerwork and an electrode. The firebrick checkerwork includes one or more conductive firebrick layers, each including a plurality of electrically conductive doped metal oxide firebricks with one or more airflow vents. The electrode includes one or more electrode firebrick layers, each layer including a plurality of electrode firebricks. The firebrick checkerwork is heated due to application of electrical power to the electrode. Air flowing through the firebrick checkerwork may then be heated for use in heat-related applications (e.g., an industrial application, commercial application, residential application, transportation application, etc.) some of which may relate to electricity production or in other applications which may relate to other purposes that require heat that are unrelated to electricity production.

A thermal energy storage system includes a firebrick checkerwork and an electrode. The firebrick checkerwork includes one or more conductive firebrick layers, each including a plurality of electrically conductive doped metal oxide firebricks with one or more airflow vents. The electrode includes one or more electrode firebrick layers, each layer including a plurality of electrode firebricks. The firebrick checkerwork is heated due to application of electrical power to the electrode. Air flowing through the firebrick checkerwork may then be heated for use in heat-related applications (e.g., an industrial application, commercial application, residential application, transportation application, etc.) some of which may relate to electricity production or in other applications which may relate to other purposes that require heat that are unrelated to electricity production.

A thermal energy storage system includes a firebrick checkerwork and an electrode. The firebrick checkerwork includes one or more conductive firebrick layers, each including a plurality of electrically conductive doped metal oxide firebricks with one or more airflow vents. The electrode includes one or more electrode firebrick layers, each layer including a plurality of electrode firebricks. The firebrick checkerwork is heated due to application of electrical power to the electrode. Air flowing through the firebrick checkerwork may then be heated for use in heat-related applications (e.g., an industrial application, commercial application, residential application, transportation application, etc.) some of which may relate to electricity production or in other applications which may relate to other purposes that require heat that are unrelated to electricity production.

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.

The embodiments of the present disclosure provide a flexible power supply device for an AC arc furnace and a control method thereof, which are applied in the technical field of power supply. The flexible power supply device for an AC arc furnace comprises a rectifier bridge, an inverter bridge, an arc furnace transformer, a rectifier bridge controller, an inverter bridge controller and an electrode position controller, wherein the rectifier bridge is connected to an AC power grid, and the inverter bridge is connected to an AC arc furnace transformer; and, the rectifier bridge controller is responsible for controlling the rectifier bridge and stabilizing a DC voltage of the rectifier bridge, and the inverter bridge controller is responsible for controlling the inverter bridge and stabilizing a primary side current of the AC arc furnace transformer. The flexible power supply device for an AC arc furnace realizes the double isolation of the fluctuation of the AC arc furnace from a power supply system through the inverter bridge and the rectifier bridge, thus significantly reducing the flicker of the power grid caused by the fluctuation of the AC arc furnace and reducing the influence of the smelting process of the arc furnace on the power grid.

The embodiments of the present disclosure provide a flexible power supply device for an AC arc furnace and a control method thereof, which are applied in the technical field of power supply. The flexible power supply device for an AC arc furnace comprises a rectifier bridge, an inverter bridge, an arc furnace transformer, a rectifier bridge controller, an inverter bridge controller and an electrode position controller, wherein the rectifier bridge is connected to an AC power grid, and the inverter bridge is connected to an AC arc furnace transformer; and, the rectifier bridge controller is responsible for controlling the rectifier bridge and stabilizing a DC voltage of the rectifier bridge, and the inverter bridge controller is responsible for controlling the inverter bridge and stabilizing a primary side current of the AC arc furnace transformer. The flexible power supply device for an AC arc furnace realizes the double isolation of the fluctuation of the AC arc furnace from a power supply system through the inverter bridge and the rectifier bridge, thus significantly reducing the flicker of the power grid caused by the fluctuation of the AC arc furnace and reducing the influence of the smelting process of the arc furnace on the power grid.