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JP2978372B2 |
PURPOSE: To execute a supplying electric power control in good accuracy and good responsiveness by controlling the supplying electric power to a plasma torch based on outputs of a molten steel temp. control arithmetic part and a throughp...
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JP2979816B2 |
PURPOSE: To shorten the operating time of an arc furnace by making automatic operation from the electrode upper limit position without requiring manual intervention of the operator, and letting it to descend until current starts to flow ...
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JPH11281255A |
To convert a solid material into fused state with maximum efficiency at minimum cost by making a decision whether an electrode is located at a position suitable for light covering arc system during movement thereof and monitoring the ele...
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JP2962442B2 |
PURPOSE:To eliminate reactive power due to pulsation in voltage by making current constant, which flows to a DC arc furnace energized by a thyrister, by means of a constant current control circuit, controlling electrode elevation for kee...
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JP2961146B2 |
PCT No. PCT/EP93/00023 Sec. 371 Date Oct. 8, 1993 Sec. 102(e) Date Oct. 8, 1993 PCT Filed Jan. 8, 1993 PCT Pub. No. WO93/14557 PCT Pub. Date Jul. 22, 1993.A controlled power supply in which an electric arc is used as a loading element. A...
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JPH11273854A |
To perform horizontal-attitude and all-attitude welding, with high quality and high efficiency a welded structure. In welding, when a molten pool is formed on a welded structure 20 by generating a welding arc between a welding torch 24 a...
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JPH11264505A |
To prevent piping and heat equipment from being rusted while saving the energy of the source of heat, and to prevent an impurity from adhering for improving the durability of a device itself by providing a tourmaline granular aggregate t...
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JPH11260545A |
To prevent the damage of an electrode connecting part and the coming off of an electrode by performing the shrinkage fitting of annular fastening members to a socket peripheral part located inside more than the edge of an electrode pole ...
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JP2946619B2 |
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JP2946681B2 |
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JP2940133B2 |
PURPOSE:To perform additional loading of melting raw material at a proper time and save energy by a method wherein a difference between a temperature of a furnace wall detected by a temperature sensing device placed at an arc varying dir...
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JP2940374B2 |
PURPOSE: To reduce an imbalance of impedance between respective phases, and enable adoption of a low-cost arrangement by performing delta connection of a transformer on the heating furnace side, and passing in-phase reciprocating electri...
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JP2940134B2 |
The invention provides a direct current electric arc furnace which is composed of a feeding system of direct current to the furnace, a movable electrode at the roof of the furnace, and a bottom electrode attached to the bottom of the fur...
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JPH11224794A |
To provide a melting furnace in which a material to be treated is effectively heated and melted with the plasma flame, and the slag free from mixture of any non-melt stuff and excellent in quality can be obtained. In a plasma type meltin...
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JP2935595B2 |
A metallurgical vessel, esp. for use in a DC current electric arc furnace and which has a metallic electrode attached to the base of the furnace. The electrode is formed of two bar sections, one of which contacts the melt and the other p...
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JPH11219781A |
To provide a cooling structure for a furnace-bottom electrode, which can prevent a deformation and a crack in a bonded part of an upper rod electrode and a lower rod electrode and can extend a life time of the furnace- bottom electrode. ...
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JP2929670B2 |
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JPH11204251A |
To eliminate need of a burner to fuse ash, and eliminate the need of an expensive power source for arc. In a power source device connected to an upper electrode 1 and a lower electrode 3 of an electric resistance fusion furnace for proce...
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JPH11201481A |
To reduce power consumption while facilitating handling by forming the inner circumferential surface of a container set with conditions of negative inner pressure of an insulator and providing electrodes for causing discharge in the cont...
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JP2927554B2 |
PCT No. PCT/NO95/00123 Sec. 371 Date Feb. 28, 1996 Sec. 102(e) Date Feb. 28, 1996 PCT Filed Jul. 7, 1995 PCT Pub. No. WO96/03849 PCT Pub. Date Feb. 8, 1996The invention relates to a self-baking carbon electrode produced in direct connect...
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JP2920972B2 |
PURPOSE:To prevent wear of a furnace bottom electrode and to maintain the electrode so that multiple times of meltings can be executed by supplementing electrode supplemental material of pure iron, etc., into melting part above the furna...
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JPH11507990A |
The surface of a workpiece is cleaned by generating a steady-state one atmosphere glow discharge plasma above the surface of the workpiece. The use of one atmosphere, uniform glow discharge plasmas generated by a low frequency RF ion tra...
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JPH11183044A |
To shorten the treating time of a whole and to prevent the occurrence of partial loss to a furnace wall by a method wherein through measurement of the furnace wall of each electrode part, respective powers charged to respective electrode...
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JPH11170050A |
To prevent diffusion of an inert gas as well as a welding defect by filling foam, in which gas small particles are wrapped with liquid films, in a piping of one side or both of a weld part and preventing air flow in a piping. An arc 15 i...
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JPH11173517A |
To provide a plasma torch which can freely move its arc adhering point in the axial direction of a cathode tube. In a plasma torch which is constituted to generate plasma from a working gas 20 supplied into an anode tube 1 and a cathode ...
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JP2910052B2 |
PURPOSE:To facilitate power control for each bottom electrode of each furnace and to maintain three phases of a power source equilibria by providing windings for the bottom electrodes of the furnaces in the phases of a load side with the...
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JP2910051B2 |
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JP2908101B2 |
PURPOSE:To prevent the accident of an electrode dropping or breaking during operation and to save labor at a site of use of the same by mounting a nipple in one of socket holes and an electrode hook in the other hole in advance, and conv...
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JPH11162632A |
To shorten the total processing time and reduce partial wear of a furnace wall by measuring the furnace wall temp. around each electrode, and controlling individually the input powers to the electrodes so that the measurements lie within...
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JP2903915B2 |
PURPOSE:To obtain an electrode lift controller of an arc heating furnace which achieves excellent operability by simplifying the construction to facilitate adjustment. CONSTITUTION:This apparatus is provided with an average current detec...
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JP2905575B2 |
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JP2903544B2 |
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JP2901838B2 |
A corona electrode having an outer dielectric layer and an undercoat of a copper layer that permits the electrode to operate at a lower temperature for a specific power input over a similar electrode without the copper undercoat.
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JPH11142066A |
To always hold a stable electric conductivity economically with a high durability. At the furnace bottom electrode 1 of a multiple pin type DC electric furnace having many steel electrode pins (contact pins), steel electrode pins 2 are e...
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JPH11142065A |
To always hold a stable electric conductivity economically with a high durability. At the furnace bottom electrode 1 of a billet type DC electric furnace having 1 to 3 steel electrode bars (billets), steel electrode bars 2 are embedded i...
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JPH11135253A |
To shorten melting period, reduce power unit requirement, and decrease frequencies of flicker generation and electrode break, by occasionally selecting a corresponding characteristic map from plural characteristic maps preset by integrat...
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JP2594776Y2 |
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JPH11111449A |
To lessen consumption of an electrode rod by forming any one of layers of silicon carbide, titanium carbide, boron carbide, and tungsten carbide in a specified thickness on the surface of a rod-like body made of graphite. An electrode ro...
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JP2884636B2 |
PURPOSE:To detect ground accident and malcontact to stop power supply and to secure safety of the equipment by connecting a voltage detector grounded at one terminal with a DC power source terminal in an anode side power supplying wire c...
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JP2883447B2 |
PCT No. PCT/DE94/01497 Sec. 371 Date Jul. 18, 1996 Sec. 102(e) Date Jul. 18, 1996 PCT Filed Dec. 6, 1994 PCT Pub. No. WO95/16336 PCT Pub. Date Jun. 15, 1995A process and a device for regulating the position of the tip of an electrode imm...
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JP2880574B2 |
An arc is drawn between a movable electrode (E) (preferably graphite), and a fixed electrode (7) in a furnace when smelting metal oxides using a plasma. Shielding gas, e.g. N. is introduced into plenum (P) about the movable electrode (E)...
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JPH1190568A |
To easily form the ring gear by forming the tooth profile through the hot pressing using a re-workable die, and to simplify the subsequent the treatment or working. A ring gear 1 is hot pressed using a die 2 for manufacturing the ring ge...
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JPH1183330A |
To evaluate accurately the melting progress of raw materials with which an arc melting furnace is charged. In this melting progress evaluation method for an arc melting furnace, oscillation sensors 1 are mounted on a furnace shell 12 at ...
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JP2875120B2 |
In an electric arc furnace arrangement for producing steel by melting scrap (27), in particular scrap iron, and/or sponge iron and/or pig iron as well as additives in a furnace vessel (1), at least one graphite electrode (11), movable in...
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JPH1151567A |
To provide a DC electric furnace which can effectively restrict the deflection of arc. This DC electric furnace is provided with a furnace bottom electrode 11 in which a conducting refractory 11b is arranged on the top surface of an elec...
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JP2591142Y2 |
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JP2860504B2 |
An improved arc furnace regulator employs neural circuits connected in a multi-layer network configuration with various weighted relationships between the successive layers which are automatically changed over time as a function of an er...
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JP2856218B2 |
This electrical connecting device comprises an electrode (5), a sleeve (19) mounted around the protruding end portion (8) of the electrode (5), and means of cooling the sleeve (19) by means of a coolant fluid, which means consists of at ...
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JPH1129813A |
To restrain the oxidizing wear developed on the side surface of an electrode, particularly in an oxygen enriched operation and to reduce unit requirement of the electrode by using the graphite electrode coated with a coating agent contai...
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JPH1123163A |
To provide a clog detector for scrap preheater/loader. The clog detector for a scrap preheater/loader disposed on the top of an arc furnace and supplying scrap 4 to an arc furnace while heating comprises a pair of nozzles 11 disposed opp...
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