摘要:
A method for forming a protective antioxidative barrier on the furnace electrodes using a chemically altered cooling liquid containing an antioxidant additive. This method can be applied to electrodes used in electric arc furnaces and ladle metallurgy furnaces. The method can involve spraying the cooling liquid onto the electrode, thereby forming the protective antioxidative barrier and reducing the oxidation of the electrode.
摘要:
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.
摘要:
A metal forming apparatus includes a smelting device, a molding device, an injection device and a vacuumizing device. The smelting device defines a smelting chamber, and includes a rotatable crucible and a heating unit both disposed within the smelting chamber. The molding device defines a molding chamber sealedly communicated with the smelting chamber. The injection device includes a charging barrel assembly sealedly disposed at a joint between the molding device and the smelting device and an injection unit sealedly connected with the smelting device. The vacuumizing device is sealedly connected with the smelting device and the molding device respectively so as to vacuumize the smelting chamber and the molding chamber.
摘要:
The present invention relates to a method of operating an electric arc furnace containing (a) a furnace shell having a tapping hole and/or a slag door, (b) a furnace roof having a plurality of electrodes provided so as to face downwards, and (c) a rotating apparatus that rotates the furnace shell around a vertical axis relative to the electrodes, the method contains a rotating step of rotating the furnace shell relative to the electrodes during melting of a metal material, and a holding step of stopping the rotation when any one of the plurality of electrodes reaches a holding position that is previously set close to the tapping hole or the slag door, and holding the furnace shell at the holding position.
摘要:
A contact plate intended to be brought into contact with the wall of an electrode of an electro-metallurgical furnace, comprising an internal channel having an inlet and at least one outlet which can be linked respectively to an external supply conduit and at least one external discharge conduit for a fluid. According to the invention, at least one elongate hole (16) is provided, inside which an elongate partition (35) is installed that has opposing elongate edges (39) adjacent to opposing elongate areas (33) of the elongate hole so as to define, in said hole, elongate spaces (16a-16b) to either side of the elongate partition, the elongate partition defining a communication passage (41) between said elongate spaces and connecting holes (29) communicating with said elongate spaces being provided at a distance from said communication passage, said elongate spaces forming portions of said internal channel (59).
摘要:
A method and sealing arrangement for sealing of gaps in a contact shoe ring. The sealing arrangement comprises a refractory fabric which is folded to a substantially U-form shape having a first branch portion attached with refractory glue to the first side edge of the first contact shoe element and a second branch portion attached with refractory glue to the second side edge of the second contact shoe element. At least one refractory felt strip is arranged between the first and second branch portions to fill the space therebetween. A cover strip made of refractory fabric is attached with refractory glue to the side faces of the first and second contact shoe element.
摘要:
A method of manufacturing a cylindrical thermal insulation wall body having a holding unit of a heater element formed in an inner peripheral surface includes processing a plate-shaped thermal insulation member such that a plurality of groove portions are formed at a predetermined pitch, processing the thermal insulation member such that an angle between either of the first surface and the second surface, and a third surface on which the groove portions are formed, is 90+180/n degrees, and manufacturing the cylindrical thermal insulation wall body by bonding a plurality of sectional thermal insulation members, wherein the plurality of sectional thermal insulation members are bonded such that the groove portions of the adjacent sectional thermal insulation members are aligned with each other and to form the holding unit in the inner peripheral surface of the cylindrical thermal insulation wall body.
摘要:
For permitting temperature manipulation of a melt even at a conductivity below 10−1 Ω−1 cm−1 and thus permitting refining of the melt at temperatures about 1700° C., the invention provides a method and a device for temperature manipulation of a melt (16), in particular in a refiner unit. The melt (16) is heated at least by ohmic resistance heating with at least two electrodes (4) that are arranged in the melt (16). At least a part of the melt (16) is cooled. The device (1) for temperature manipulation, refining, purification and homogenisation of a melt (16) comprises at least one arrangement for accommodating melt material (36, 16), defining an inner chamber, and at least two electrodes (4) for ohmic resistance heating of the melt (16). The electrodes (4) project into the inner chamber of the arrangement, in particular of a vessel (2).
摘要:
An electrode holder for use in a furnace for melting a batch material to form molten glass is disclosed comprising a refractory coated nose member presented to and in contact with a molten glass material contained within the furnace. The refractory coating is preferably a flame- or plasma-sprayed ceramic such as alumina or zirconia. That protects the nose member from corrosion from the hot molten glass.
摘要:
In an apparatus (1) for adjusting an electrode (5) of a metallurgical furnace, in particular a furnace for resistance operation having a furnace lid (15), comprising a clamping ring (3) and a holder ring (4, 14), the holder ring (4, 14) is designed to be arranged in the furnace lid (15).