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Patent Searching and Data


Matches 501 - 550 out of 3,596

Document Document Title
WO/1999/047873
The present invention relates to a method for determination of the electrode tip position for consumable electrodes in electric smelting furnaces, which electrodes being submerged in the furnace charge. The voltage between two geometrica...  
WO/1999/046412
The invention relates to a method for cooling a lance provided for converting a medium into a molten mass and/or for measuring the properties of the molten mass. A gas/liquid mixture is fed as a cooling medium into a cooling circuit whic...  
WO/1999/042625
The invention relates to a charging stock preheating device for preheating a charge (60) to be charged into a furnace vessel (3) and comprising a stack (9) fixed in a frame structure (20). In its upper area the stack has a closable charg...  
WO/1999/042779
A seal for a high temperature treatment vessel, particularly those common to the steel industry, has a primary purpose to prevent gases from escaping the treatment vessel. The seal is provided by a positive gas pressure curtain barrier m...  
WO/1999/041419
A metallurgical furnace, preferably a metallurgical furnace for the production of copper, is equipped with a forebay. The forebay is in open communication with the settler of the furnace by a passageway that allows for the continuous rem...  
WO/1999/041560
Cooled roof for electric arc furnaces (20) or ladle furnaces (29), the roof being used as a covering element and including a cooling system comprising tubes fed with cooling fluid, the roof including at least a central aperture (25) for ...  
WO/1999/041561
The invention relates to a charging device for low blast furnaces, especially for arc furnaces used for producing scrap iron, which can be closed by a cover connected to a gas discharging unit and over which a charging device can be plac...  
WO/1999/037822
Method to feed tuyères in an electric furnace, the tuyères comprising a central conduit to deliver a comburent gassy substance and a peripheral conduit to deliver a cooling gassy substance, the method providing to send to the central c...  
WO/1999/030857
Specialty metals and alloys are melted in a crucible (10) typically holding no more than about 100 lbs. of metal and disposed in a furnace (2) filled with an inert gas and subjected to a vacuum in the range of about 5 % to 32 % of atmosp...  
WO/1999/031021
According to the present invention there is provided a refractory lined glass melter (10) for producing refined glass from raw glass-forming material (30) using at least one oxygen-fuel burner (34) recessed within a burner block (38) mou...  
WO/1999/029914
Disclosed is a feeding device for closed shaft furnaces that are attached to a gas extracting device, more particularly low shaft furnaces for melting steel scraps, with a conveyor device leading to the head of the upper tank of the furn...  
WO/1999/027141
The invention relates to a smelting furnace to smelt metals, especially steel scrap. The inventive furnace consists of a lower receptacle with a tap hole in the bottom and an upper receptacle which can be closed by a lid. A central pipe ...  
WO/1999/027144
The present invention relates to an operation method of furnace equipment for magnesium alloys, wherein a bath surface is covered with a protection gas containing a sulphur compound. The purpose of this invention is to reduce the product...  
WO/1999/024194
The invention relates to a method and apparatus for melting of non-ferrous metals, especially magnesium. The metal material is charged into a furnace chamber (1) and flows through openings (6; 7) in the intermediate furnace chamber walls...  
WO/1999/023264
The invention relates to a method and device for controlling the formation of foamed slag in an arc furnace (5) to which the carbon is fed in such a way that the arc is at least partially enveloped in the arc furnace (5) and an over abun...  
WO/1999/020966
A metallurgical furnace which comprises a furnace body shell, a bottom wall comprising lining bricks provided on an inner side of the furnace body shell, and a side wall comprising water-cooled metal panels provided on the inner side of ...  
WO/1999/018245
According to the invention, direct reduced iron of at least 80 wt. % and having a maximum grain size of 3 mm is smelted in an electric arc furnace. The furnace contains a bath comprised of liquid iron. During operation of the furnace, a ...  
WO/1999/018244
A method and apparatus for forming a lining on the interior faces (11) of a vessel (9) is disclosed. The method and apparatus involve installing a granular composition (4) into a gap (10) formed between the internal faces (11) of the ves...  
WO/1999/016728
The invention relates to a device for preheating charge materials (2) for a metal smelting assembly (4), comprising a feed shaft (6) for receiving the charge materials, said feed shaft having a feed opening (8) in its top area and openin...  
WO/1999/016083
A continuous sintering plant for use in sintering nuclear fuel pellets or the like, having an integrated structure where the upper part of a sintering furnace is incorporated in a glove box for maintenance use. The furnace consists of a ...  
WO/1999/013281
Cooling device with panels for electric arc furnaces, employed in an electric furnace in cooperation with the vertical sidewall located above the lower shell (11) of the furnace and/or with the roof (18), the furnace comprising a lower s...  
WO/1999/005466
A method and apparatus for producing crude liquid steel using direct reduced iron as a raw material in an electric arc furnace with an acid resistant sidewall refractory lining (32). In order to effect the more economical melting operati...  
WO/1999/004046
The invention concerns an inert tank for treating an oxidable liquid metal (3), comprising a metal tank body and lid internally protected with an inert refractory lining (1, 13), said tank body comprising a plurality of inlets and outlet...  
WO/1999/002287
Fluxless melting of magnesium (alloy) metal applying a gas mixture of dry air and SO¿2? as protection atmosphere is provided where a constant pre-set level of SO¿2? is maintained by means of two mass flowmeters where one of them is in ...  
WO/1999/001710
The invention concerns an electric-arc furnace with an off-center taphole (26) through the bottom, designed for steel making and known under the name of an EBT furnace. It is comprised of a vat (4) for receiving the metal to be melted, a...  
WO/1999/000522
In order to produce molten metal from all types of metal carriers used in metallurgy, and in particular from a wide range of quantitative combinations, an installation for producing molten metal comprises the following components: an ele...  
WO/1999/001011
Electric heating elements (14) and heaters suitable for use in molten metals such as molten aluminum are provided. An improved electric heater assembly (10) suitable for heating molten metal is disclosed. The electric heater assembly (10...  
WO/1998/055411
An apparatus (100) for melting materials is provided comprising a melter body (10) having a batch injection portion (12) including a batch inlet port (13), a batch melting portion (14) including a batch melting chamber adapted to receive...  
WO/1998/054514
A method and apparatus for operation control of a melting furnace (1) provided with an inlet (2) for burned ash (6), a cinder notch (3) for molten slag (7), and a heat source (9) for heating the supplied burned ash. The method comprises ...  
WO/1998/053261
A metallurgical furnace unit (1) includes a cylindrical furnace body (2) which is intended for rotation and/or tilting or like movement and is provided with at least one ring (7) mounted outside the furnace body (2) and functioning to en...  
WO/1998/048228
The invention concerns a method for smelting iron-based alloys in an electric furnace (10) whereby the furnace is loaded with scrap, wherein at least part of the loaded scrap is cut out inside said furnace by means of a projecting nozzle...  
WO/1998/048229
Apparatus for mounting in or on a furnace comprises fluid circulation means defining a fluid circulation path, having first and second path portions adapted, in use, to lie towards the exterior and interior of the furnace respectively.  
WO/1998/046956
System to load pre-heated scrap by means of baskets for electric arc furnace, the furnace including a movable roof (28), at least one basket (15) loaded with scrap being arranged in a lateral position near the furnace, the basket (15) be...  
WO/1998/043030
When operating an electric furnace, each electrode is surrounded by an open-ring duct, placed on the furnace roof and fixed with respect thereto, from which pressurized water is delivered, with different angles with respect to the electr...  
WO/1998/043032
Method to load scrap for electric arc furnace including at least a roof (13) associated with movable moving means (17) cooperating with second movable moving means (24), the roof (13) including at least a hole (15) to discharge the fumes...  
WO/1998/042880
Basket to manipulate scrap in cooperation with an arc furnace (11) and with means to pre-heat the scrap by means of the fumes from the fourth hole (14), the basket being able to be associated with a movable covering system (16) and inclu...  
WO/1998/036101
The invention relates to a method for positioning the mouth of a consumable lance designed to transport gases and/or solid substances in a metallurgical vessel filled with liquid metal, specially steel. Said method comprises the followin...  
WO/1998/035196
A metal melting apparatus comprises a metal melting furnace (10) for melting a metal stock with flames from an oxygen burner (11), which uses an oxygen as a support gas, and an oxygen supply equipment for supplying to the oxygen burner (...  
WO/1998/029572
An electric arc furnace (10) having a partially insulated electrode (37) produces molten metal (28) such as foundry iron from an iron source where little or no slag (30) is produced. The furnace (10) includes at least one insulated elect...  
WO/1998/026245
An arc furnace which includes a shell with a hearth, a roof for the shell, the roof including a plurality of segments (10, 11) which are substantially electrically isolated from each other and from the shell, an electrode (12) and a refr...  
WO/1998/015792
Melting apparatus for melting a metal, such as aluminium, comprising a melting chamber, a burner chamber and a passage which extends between the melting chamber and the burner chamber and which has an inlet opening on the melting-chamber...  
WO/1998/013658
Spray-cooled roof for a metallurgical furnace in the form of an assembly of separate hollow metal sections, each of which has a separate spray cooling system.  
WO/1998/012360
A process for refining high-impurity blister copper to anode quality copper is disclosed. In an oxidation step of a blister copper refining stage, soda ash fluxing removes antimony and arsenic while also removing sulfur and iron. In a de...  
WO/1998/008041
This invention concerns a smelting installation with an electric-arc furnace in which the roof of the oven vessel is constructed out of two units (7, 8) which are separated by an aperture (38) and can be moved independently of one anothe...  
WO/1998/007889
A batch preheater (4) has a charging shaft (14) carried by a supporting structure (64) and batch retaining fingers associated to the bottom end of the charging shaft. According to the invention, the batch preheater (4) comprises a frame ...  
WO/1998/006990
The present invention is a bulk loader apparatus for providing bulk material through an open roof of an electric arc furnace (2). The apparatus has a base (11), a swing arm (19), a swing cradle (53), and a hopper (55) positionable in the...  
WO/1998/003830
The object of the invention is a melting unit to melt an entire railway car and other voluminous metallic manufacture contaminated by asbestos. The melting unit is composed by lateral walls (1). The burners (2) are placed on lateral wall...  
WO/1998/000246
Apparatus (10) and a method for vitrifying hazardous waste includes a melting vessel (12) in which hazardous waste and any other necessary components for forming a glassy mixture upon heating are introduced for heating by a heater (38), ...  
WO/1998/000568
An arc furnace has a furnace vessel, a furnace inner chamber and at least one electrode (4) that projects into the furnace inner chamber. The furnace is characterised by an electrode receiving chamber (5) accessible from one side of the ...  
WO/1997/038141
Smelting reduction apparatus for manufacturing a molten metal under the slag by adding a raw metal material, charcoal and a medium solvent to a furnace body having a rectangular horizontal section, and blowing oxygen and/or an oxygen enr...  

Matches 501 - 550 out of 3,596