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WO/1998/000246A1 |
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), ...
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WO/1998/000568A1 |
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 ...
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WO/1997/038141A1 |
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...
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WO/1997/031232A1 |
An electric furnace assembly comprises an electric arc furnace (1) with an electrically conducting furnace bottom (3), at least two electrodes (2) and a number of power sources (6) equal to the number of electrodes, each power source com...
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WO/1997/030320A1 |
In order to preheat iron-base scrap comprising iron pieces of wide ranges of size and shapes at a high efficiency so that these pieces are not fused to one another, a rotary kiln type preheating furnace and a shaft furnace type preheatin...
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WO/1997/028287A1 |
A method for processing a powdery material, wherein said material is contacted with a non-aqueous liquid substance heated by combustion gases and comprising at least 30 % by volume of a predominantly oxidised material, substantially with...
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WO/1997/027335A1 |
A ladle brick leveling set (20, 21) for high temperature molten metal ladles in which specially shaped refractory bricks are disposed in a slightly sloping geometrical configuration so as to compensate for a sloping bottom (19) of a high...
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WO/1997/027441A1 |
A cassette regeneration system (10) for an oxy-fuel regeneration assembly (52) having oxy-fuel burners (54) includes a first regeneration assembly (62) having at least one removably connected cassette regenerator (32), a second regenerat...
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WO/1997/027336A1 |
Melt reduction equipment for directly producing a molten iron or a molten pig iron by adding a raw material of iron, a carbon material, and a flux to a furnace body and blowing pure oxygen and/or an oxygen-enriched gas into the furnace, ...
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WO/1997/026077A1 |
An apparatus (10) for calcining a material comprises a calcination vessel (10) which houses a heat exchanger (12). The heat exchanger (12) is arranged to transfer heat to the material from a liquid metal heat exchange fluid arranged to f...
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WO/1997/026101A1 |
In a charge well (C) for adding scrap metal pieces or particles to a molten metal bath, a stationary diverter (20) is provided in the charge well (C) for diverting the circular flow of molten metal, caused by orientation of the inlet por...
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WO/1997/023419A1 |
An electric resistance melting furnace for vitrifiable compositions such as glass, enamel or ceramic has a melting end (1) which rotates around the vertical axis and a stationary top furnace (4) which may be continuously or intermittentl...
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WO/1997/021965A1 |
This invention relates to a panel for furnaces, which are intended to be used when smelting steel by means of so-called high-temperature processes, the panel being intended to be an integral part of wall constructions and/or ceiling cons...
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WO/1997/017475A1 |
A process of injecting oxidizing gas into a furnace for post combustion of gaseous CO during production of steel from a charge placed in the furnace includes a first period of injection and a second period of injection. During the first ...
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WO/1997/006394A1 |
A metal fusion furnace capable of controlling speeds, at which a metallic material is charged from a preheating section to a fusing section, within an optimum range, and efficiently fusing the metallic material only with oxygen burners, ...
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WO/1997/006653A1 |
A bottom electrode for an arc furnace operated with direct current consists of two parts made of different materials that may be joined to each other. One wearing part made of a material that is comparable to the molten mass is arranged ...
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WO/1997/005438A2 |
The invention concerns an arc furnace, in particular a d.c. arc furnace, comprising a vessel and a cover which lies thereon and has an opening for at least one electrode provided with a movement unit for vertical displacement. According ...
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WO/1997/002365A1 |
Method and apparatus for after-burning (post-combusting) of combustible gases contained above metal in a metallurgical smelting vessel. The apparatus includes an oxygen lance (12, 52) adapted to deliver jets (20, 22) of oxygen from an en...
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WO/1997/002364A1 |
Method and apparatus for post-combustion (after-burning) of the combustible gases present in a metallurgical vessel used for smelting metals. A swirling flow of an oxidizing gas emanating from a radiant injector (10) having a funnel-shap...
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WO/1997/002366A2 |
Method and apparatus for introducing oxidizing gas, e.g. oxygen into the atmosphere of an electric arc furnace to effect post combustion (after-burning) of gases in the atmosphere and provide a radiant heat source (18, 36) inside the fur...
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WO/1997/000413A1 |
A method for melting a batch in a furnace, particularly an electric furnace for melting scrap to produce steel, wherein melting energy is supplied to the load and fumes are post-combusted by injecting an oxygen-containing gas into the sp...
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WO/1996/041771A2 |
The disclosed cross-flame arrangement of cross-fired tank furnaces aims at a relative reduction of flame and roof temperatures in order to improve furnace performance and reduce nitrogen oxide. By partially deflecting fuel jets sideways ...
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WO/1996/041896A1 |
Method for improving the energy input during the heating and melting of a scrap bulk, in which a channel is burned into a scrap bulk and additional energy for the heating and melting of the scrap bulk is input through this channel, where...
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WO/1996/040373A1 |
A method and apparatus are disclosed for injecting vaporizable material, such as a vaporizable waste, into a molten bath. A gas is injected into the molten bath at a rate which is sufficient to cause the gas and the molten bath to form a...
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WO/1996/041028A1 |
An improved oxygen blowing/fuel burner lance assembly for introducing, at selected times, a flow of oxygen and/or carbonaceous fuel material into an electric furnace vessel. The lance assembly (10) includes a housing portion (14), a stra...
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WO/1996/036580A1 |
The melt (35) produced in a furnace (30) during the course of making a fused-cast refractory product is effectively treated with a beneficiating gas by injecting the gas in a substantially continuous manner through a tuyere (10) extended...
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WO/1996/034710A1 |
The invention relates to a method for measuring the amount of liquid metal contained in tiltable casting furnaces. It is established and maintained a reference curve for the amount of metal in the furnace as a function of the furnace til...
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WO/1996/034244A1 |
A furnace plant which comprises at least one furnace vessel (2) with side walls (21) and a bottom (22) and at least one heat source (31) which by radiation and convection heats molten metal and/or solid metal present in said furnace vess...
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WO/1996/032505A1 |
In order to profitably process various iron ores having different compositions, a plant for producing iron smelts (24), in particular steel smelts, such as crude steel smelts, has an electric arc furnace vessel (1) and a refiner vessel (...
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WO/1996/032616A1 |
The equipment reliability of a raw material retaining gate of a preheater is improved, the equipment cost is reduced, the effect of preheating the raw material by use of the waste gas is enhanced, and the melting electric power energy is...
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WO/1996/031627A1 |
A method and an apparatus for producing metals and metal alloys from metal oxides in a metallurgical vessel containing a molten bath having a metal layer and a slag layer is disclosed. The method is characterised by injecting a carrier g...
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WO/1996/030709A1 |
An apparatus for highly efficiently preheating and melting scrap, which comprises a scrap melting furnace having arc heating means or a top-blowing lance, and a device for introducing an exhaust gas generated from the scrap melting furna...
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WO/1996/029442A1 |
A method for heating vessels (1), e.g. galvanisation vessels, for molten metal baths (2), wherein use is made of at least one element (3) consisting of a substantially gas-tight and especially oxygen-tight heat-conducting refractory mate...
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WO/1996/028573A1 |
A method for producing steel in an electric arc furnace comprising a vessel containing a molten steel bath, a roof covering the vessel, and one or more roof electrodes inscribed within a cylinder. According to the method, an oxygen-conta...
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WO/1996/027412A1 |
A method and an apparatus produce a product in at least one phase from an organic component in a feed gas stream. The method includes forming a process zone including a process molten bath and a process gas space disposed over the proces...
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WO/1996/024698A1 |
A direct arc furnace for foundries has a hearth (6) and a lid (14) with at least one opening (22) through which an electrode (12) may be introduced into the furnace. A burner (26) is arranged in at least one opening (22) to melt away the...
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WO/1996/024697A1 |
An apparatus (1) for injecting gases or fluids in general and particulates, particularly for injecting oxygen, in furnaces for the production of steel. The apparatus comprises a structure (2) for supporting at least one injection lance (...
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WO/1996/022397A1 |
An apparatus and method for reclaiming metal chips formed while machining metal castings to their finished shape. The apparatus includes a stationary charging tube (100) extending in a generally perpendicular direction from the charge we...
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WO/1996/019592A1 |
The invention concerns a tilting metallurgical unit for smelting metallic material and for the subsequent treatment of the metal melt. The unit can tilt from an initial position in a positive tilt direction (8) about a tilting axis (7) a...
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WO/1996/017091A1 |
A direct current arc furnace (2) for metallurgical purposes has two or several electrodes (10) arranged on the furnace vessel (5) that project into the furnace vessel (5). In order to prevent arc deflection caused by the force of magneti...
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WO/1996/017215A1 |
A non-oxidizing heating method and an apparatus therefor, in which a non-oxidizing gas of high temperature is continuously produced and supplied into a furnace while operations are repeated such that a plurality of regenerative heaters a...
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WO/1996/017092A1 |
A smelting installation has a current supply network connected to a direct current arc furnace. In order to use a surrent supply network with a relatively low short-circuit rating, the invention associates a direct current arc furnace wi...
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WO/1996/016189A1 |
The process is characterized by a step of addition of a material, which includes at least one polymer originating from hydrocarbon, to the batch to be melted; conveniently, said step occurs immediately before igniting the burner. The add...
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WO/1996/010097A1 |
The invention concerns a method of processing solid residues from waste-incineration plants, the method calling for the slag to be melted and heavy metals to be separated from the slag for recycling. The slag is transferred directly from...
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WO/1996/009511A1 |
A holding furnace (1) for supplying molten metal to a casting launder (11) is disclosed including a metal chamber (9), an outlet (7a) from said metal chamber and an inlet well (5) positioned on the holding furnace (1) on or adjacent to t...
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WO/1996/008584A1 |
A process and a steel making installation are disclosed for the metallurgical treatment of iron metals, in particular for producing molten steel. In order to carry out the metallurgical treatment of iron metals, in particular for produci...
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WO/1996/006954A1 |
A burner/injector (200) and method for providing a localized impingement flame or multiple flames for scrap heating and melting through use of a fluid fuel and at least one oxygen rich oxidizing gas. The burner/injector (200) includes a ...
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WO/1996/001967A1 |
A combustion assembly (A; A') for placing in one wall (5; 5') of a furnace (F), comprising at least one pair of burners (1, 1') burning a fuel/oxidant mixture, and an oxidant nozzle (3) between the burners of the burner pair, the axes (2...
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WO/1996/000877A1 |
An electric arc furnace for melting scrap iron is to be of the simplest possible design while preventing thermal loads on the side walls caused by the electrodes and damage to the electrodes during charging. The electric arc furnace is d...
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WO/1996/000799A1 |
A method and a device for directly feeding liquid metal into an electric furnace. A carriage carrying a ladle filled with molten metal is moved forward into a starting position adjacent the electric furnace then lowered and horizontally ...
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