摘要:
Method for generating heat energy comprising supplying electrical energy to a heating element where the heating element heats a negatively charged cathode, electrons are emitted from the heated cathode towards a positively charged anode through a positively charged grid, wherein the positively charged grid is provided with greater charge potential value that the anode and the anode is forced to constantly generate heat energy, wherein at least part of the cathode, the positively charged grid and at least part of the anode are provided in hydrogen gas filled chamber of a container. A device for carrying out said method is also disclosed.
摘要:
A method for monitoring an electric arc furnace comprising the steps of: collecting data about operation of an electric arc furnace, the data including electrical data automatically collected from a furnace monitoring device and performance information automatically collected from at least one programmable logic computer; transmitting the collected data to a furnace monitoring system server having an operatively connected furnace monitoring viewer system; transmitting the collected data over a global computer network from the furnace monitoring system server to a web server; generating reports providing information concerning the historical operation of the furnace; and displaying the collected data and the generated reports in substantially real-time to authorized users via one or more of the furnace monitoring viewer system and the web server.
摘要:
Eine Elektroanordnung für einen mit Wechselstrom betriebenen Lichtbogenofen (1) weist einen Umrichter (2) auf, der eine eine Netzfrequenz (f) aufweisende Netzspannung (U) eines Versorgungsnetzes (3) in eine eine Ofenfrequenz (f') aufweisende Primärspannung (U') umsetzt. Ein Ofentransformator (4) der Elektroanordnung transformiert die Primärspannung (U') in eine Sekundärspannung (U"). Die Sekundärspannung (U") wird einer Anzahl von Elektroden (6) des Lichtbogenofens (1) zugeführt. Die Elektroden (6) sind in einem Ofengefäß (8) des Lichtbogenofens (1) angeordnet. Sie beaufschlagen ein im Ofengefäß (8) befindliches Schmelzgut (9) mit Lichtbögen (10). Die Sekundärspannung (U") wird weiterhin einer ausgangsseitig des Ofentransformators (4) angeordneten Kondensatoranordnung (7) zugeführt, mit der der Ofentransformator (4) ausgangsseitig verbunden ist.
摘要:
This invention concerns power supplies suitable for electric arc gas heaters such a plasma torches. It more particularly relates to the dimensioning of the inductor in the switched-mode DC to DC converter used for feeding the torch. The invention concerns in particular a DC power supply for driving a non-transferred electric arc gas heater, comprising: an AC to DC rectifier providing a potential U 0; a DC to DC switching converter having a switching frequency fs; a current control loop having a latency Formula (I); and, a ballast inductor having an inductance L; characterized in that inductance L is such that Formula (II) and Formula (III). Such a design ensures the stability of the current control loop, while also ensuring a sufficient amount of current ripple to spread out the erosion zone on the electrodes of the torch.
摘要:
A plasma device which is provided with: a reaction container to which a metal starting material is supplied; a plasma torch which generates plasma between itself and the metal starting material within the reaction container, thereby evaporating the metal starting material and producing a metal vapor; a carrier gas supply unit which supplies, into the reaction container, a carrier gas for conveying the metal vapor; and a cooling tube which cools the metal vapor that is conveyed from the reaction container by the carrier gas, thereby producing a metal powder. The cooling tube is provided with: an indirect cooling section for indirectly cooling the metal vapor that is conveyed from the reaction container by the carrier gas and/or the metal powder; and a direct cooling section for directly cooling the metal vapor and/or the metal powder, said direct cooling section being continued to the indirect cooling section. At least a part of the inner wall of the indirect cooling section is provided with projections and/or recesses.
摘要:
A system and method is disclosed for monitoring the operating parameters of an electric arc furnace (16) having a primary electrical circuit (14) comprising a primary current transformer (52). The method comprises monitoring the furnace's primary current transformer; collecting data therefrom; transmitting the collected data to a server (18) having an operatively connected monitor; and displaying the collected data on the monitor in substantially real-time. The server also collects information about the performance of the furnace from a programmable logic computer and information entered manually by an operator at a furnace monitoring viewer system (72), which may also be displayed in substantially realtime on the monitor.
摘要:
An anode for transfer plasma heating in which a DC current is applied to melted metal in a vessel to produce an Ar plasma and heat the melted metal is characterized in that it comprises an anode which has an internal water-cooling structure and is made of conductive metal, a metallic protective element which is placed outside the anode with a certain gap therebetween and has an internal water-cooling structure, and a gas supply means for supplying an Ar-containing gas into the gap between the anode and the protective element, and the central part of the outer surface of the tip of the anode is recessed.