The present invention discloses a furnace power supply apparatus for the supply of an electric arc furnace or a submerged arc-resistance furnace with electric energy, wherein the furnace power supply apparatus is connectable to a three-phase power network, wherein the furnace power supply apparatus is connectable to at least one electrode of the electric arc furnace or the submerged arc-resistance furnace, wherein the furnace power supply apparatus comprises: a three-phase transformer with a primary circuit per phase and a secondary circuit per phase, in particular exactly one secondary circuit per phase, a rectifier circuit, andpreferably a smoothing circuit zoo connected to the rectifier circuit, and wherein the three-phase transformer is a phase-shifting transformer.

An electrode coupling monitoring system for use with a device configured to apply torque to a first electrode to threadedly couple the first electrode to a second electrode. The device is configured to output torque values relating to an applied torque. The system includes a controller configured to receive torque values and analyze the received torque values to identify a thread engagement phase during which the first electrode is or was being threadedly coupled to the second electrode. The controller is also configured to identify an end face engagement phase during which an end face of the first electrode contacts or contacted an end face of the second electrode.

An electrode coupling monitoring system for use with a device configured to apply torque to a first electrode to threadedly couple the first electrode to a second electrode. The device is configured to output torque values relating to an applied torque. The system includes a controller configured to receive torque values and analyze the received torque values to identify a thread engagement phase during which the first electrode is or was being threadedly coupled to the second electrode. The controller is also configured to identify an end face engagement phase during which an end face of the first electrode contacts or contacted an end face of the second electrode.

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.

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 semiconductor wafer received in a chamber is preheated by light irradiation from halogen lamps, and is thereafter irradiated with flashes of light from flash lamps. Prior to the flash irradiation, ozone is stored in a gas storage tank, so that the pressure in the gas storage tank is higher than atmospheric pressure. On the other hand, the pressure in the chamber is reduced to lower than atmospheric pressure. In this condition, a supply valve is opened between the time when the flash lamps turn on to start the flash irradiation and the time when the temperature of a front surface of the semiconductor wafer reaches a peak temperature. This allows ozone gas to flow all at once from the gas storage tank toward the chamber, thereby supplying the ozone gas instantaneously into the chamber.

Provided is a method for preparing zirconium boride through electric smelting. The method includes: mixing a zirconium source, boric anhydride, and a carbon source to obtain a furnace charge; conducting a smelting by feeding the furnace charge into a three-phase electric arc furnace and melting, subjecting a resulting material to refinement, heat preservation, and homogenization in sequence; heat preserving a resulting product for 1 hour to 2 hours after the smelting, and turning off the three-phase electric arc furnace; removing a resulting furnace shell and natural cooling a resulting melt; and crushing the resulting melt, selecting and removing a material skin; crushing a resulting selected material and selecting again, and removing a loose lump and collecting a dense lumpy material; and crushing the dense lumpy material, and then testing to qualify as a finished product.

Provided is a method for preparing zirconium boride through electric smelting. The method includes: mixing a zirconium source, boric anhydride, and a carbon source to obtain a furnace charge; conducting a smelting by feeding the furnace charge into a three-phase electric arc furnace and melting, subjecting a resulting material to refinement, heat preservation, and homogenization in sequence; heat preserving a resulting product for 1 hour to 2 hours after the smelting, and turning off the three-phase electric arc furnace; removing a resulting furnace shell and natural cooling a resulting melt; and crushing the resulting melt, selecting and removing a material skin; crushing a resulting selected material and selecting again, and removing a loose lump and collecting a dense lumpy material; and crushing the dense lumpy material, and then testing to qualify as a finished product.

The present application provides a power transmission vehicle device, including a vehicle body, an electrode clamping mechanism and an aluminum row clamping mechanism, wherein the electrode clamping mechanism and the aluminum row clamping mechanism are both provided on the vehicle body, the aluminum row clamping mechanism is used for clamping a power transmission aluminum row, and the aluminum row clamping mechanism is connected to the electrode clamping mechanism via a connecting cable; the electrode clamping mechanism comprises a strut and an electrode clamping assembly arranged on the strut. According to the present application, when an electrode clamping assembly clamps a conductive electrode, a corresponding operation can be performed according to a deformation change of the conductive electrode, thereby satisfying the effect of a stable clamping of the conductive electrode by an electrode clamping mechanism.

The present application provides a power transmission vehicle device, including a vehicle body, an electrode clamping mechanism and an aluminum row clamping mechanism, wherein the electrode clamping mechanism and the aluminum row clamping mechanism are both provided on the vehicle body, the aluminum row clamping mechanism is used for clamping a power transmission aluminum row, and the aluminum row clamping mechanism is connected to the electrode clamping mechanism via a connecting cable; the electrode clamping mechanism comprises a strut and an electrode clamping assembly arranged on the strut. According to the present application, when an electrode clamping assembly clamps a conductive electrode, a corresponding operation can be performed according to a deformation change of the conductive electrode, thereby satisfying the effect of a stable clamping of the conductive electrode by an electrode clamping mechanism.