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7426230 |
Sealed device for preventing exhaust gas leakage
A device that prevents exhaust gas leakage during movement of an electrode in an electric furnace. An electrode holder is attached to the electrode. An actuator moves the electrode between first...
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7027481 |
Method and electric furnace for melting vitreous materials
A method and apparatus for melting vitrifiable materials employs a melting tank for containing a molten bath with an upper surface. The tank has a floor and side walls and channels for discharging...
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6748004 |
Methods and apparatus for improved energy efficient control of an electric arc furnace fume extraction system
A fume extraction system includes a combustion zone coupled with an exhaust outlet of a furnace to receive an exhaust gas stream emerging from the furnace outlet during system operation, where the...
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6570906 |
ARC furnace with DC arc and AC joule heating
An arc furnace that utilizes a combined DC arc system and an AC joule heating system to melt the waste disposed therein and to keep the waste material in a molten condition. The DC arc system...
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6535543 |
Device to take in fumes and cool the roof of electric furnaces
Device to take in fumes and cool the roof (10) of electric furnaces. The device has a central aperture (11) into which an electrode can be inserted and a peripheral aperture (12) to take in and...
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6490312 |
Direct-current arc furnace comprising a centric charging shaft for producing steel and a method therefor
A direct-current arc furnace for producing steel has a smelting vessel with electrodes, tapping openings for the molten mass and slag, and a device for a direct removal of exhaust gases. The...
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6438154 |
Method and apparatus for recovering metal values from liquid slag an baghouse dust of an electric arc furnace
An apparatus and method for processing liquid slag and baghouse dust from a steelmaking furnace such as an EAF to recover valuable metals from the slag and dust includes a treatment vessel having a...
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6424671 |
Process for making steel
A process for making steel in an electric arc furnace includes providing a molten charge which is a melt composed of a high carbon ferrous metal in the electric arc furnace by one of preparing the...
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6418157 |
Roof for a metallurgical ladle/furnace
A roof (3) for a metallurgical ladle/furnace (L.A.F) (1) comprising a self-supporting structure of metallic pipework (4) defining at least one flow circuit for cooling water, with a lower end...
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6400747 |
Quadrilateral assembly for coherent jet lancing and post combustion in an electric arc furnace
A quadrilateral assembly in an electric arc furnace wall for providing one or more coherent jets into the furnace and for providing preferably a plurality of post combustion oxidant streams into...
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6347110 |
Charging device for low blast furnaces
A feeding device for low shaft furnaces, in particular for arc furnaces for melting scrap, it being possible for the furnaces to be closed by a cover connected to a gas-extracting device, and it...
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6301285 |
Arc furnace fume collection method
The present invention provides a system and method for collecting fumes from an arc furnace of the type typically used in metal foundries. The system provides an electrode hood with extended sides...
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6219371 |
System to plug the delta area of the roof of an electric arc furnace
System to plug the roof of an electric arc furnace having a main chamber or melting volume arranged below the roof and at least one electrode introduced into the main chamber, the system comprising...
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6175584 |
Aspiration system to reduce the losses of fine materials and powders from an electric arc furnace
Aspiration system to reduce the losses of fine materials and powders from an electric arc furnace having a lower hearth suitable to contain the bath of metal material being melted, a substantially...
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6173002 |
Electric arc gasifier as a waste processor
An electric arc gasifier adapts to the variable chemical components of waste products by utilizing mobile and fixed electrodes and a positioning system wherein a waste is injected into a heating...
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6163560 |
Method to process fumes and relative device
Method to process fumes performed on fumes discharged directly from furnaces (10) through an aperture (11) in their roof or from loading baskets (13) used to pre-heat scrap which is to be loaded...
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6163561 |
Cooled basket for steel plants
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...
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6081545 |
ARC furnace improved fume collection
An arc furnace fume collection system has a plurality of duct lines leading to a common duct that leads to a baghouse for filtering dust. The supplemental duct lines have high pressure fans,...
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5999556 |
Electric arc furnace that uses post combustion
An electric arc furnace comprises a closed melting vessel and includes means for charging metal to be molten into the melting vessel. At least one electrode extends into the melting vessel and...
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5999558 |
Integral spray cooled furnace roof and fume elbow
Spray cooled roof assembly for a metallurgical vessel, e.g. an electric arc furnace, comprising two spray cooled components, one of which covers a major portion of the furnace, and the other...
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5987051 |
Arc furnace fume collection system and method
The present invention provides a system and method for collecting fumes from an arc furnace of the type typically used in metal foundries. The system provides an electrode hood with extended sides...
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5956365 |
Electric arc furnace having slag door and post combustion process
An electric arc furnace comprises a closed melting vessel and includes a roof through which metal to be molten is charged into the melting vessel. At least one electrode extends into the melting...
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5926498 |
Melting furnace for the thermal treatment of special waste materials containing heavy metal and/or dioxin
A melting furnace for the thermal treatment of special waste materials containing heavy metal and dioxin is provided. The melting furnace includes a main furnace vessel, the main furnace vessel...
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5905752 |
ARC furnace fume collection system and method
The present invention provides a system and method for collecting fumes from an arc furnace of the type typically used in metal foundries. The system provides an electrode hood with extended sides...
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5787108 |
Exhaust device for electric arc furnaces and relative method
An exhaust device to suck in the fumes in an electric arc furnace (11) fed either by direct or alternating current. The furnace (11) comprises a crown (20) with at least one aperture (19) to...
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5748666 |
Method and furnace for treatment of ash
A method and a d.c. arc furnace for thermal treatment of an ash, wherein reducing conditions are established within a closed and sealed furnace, the ash is supplied via a channel arranged in an...
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5680413 |
Electric arc melting furnace
An electric arc melting furnace includes a furnace shell (1) with an electrode (3) for melting scrap by heat of arc, an air blasting port (20) for blasting air, oxygen or oxygen-enriched air into...
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5574746 |
Melting furnace for thermal treatment of special wastes containing heavy metals and/or dioxin
A melting furnace for thermal treatment of heavy metal-containing and/or dioxin-containing special wastes, including a clog preventing system including a principal furnace vessel, which exhibits a...
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5572544 |
Electric arc furnace post combustion method
A method for carrying out post combustion in an electric arc furnace comprising forming a preferential gas stream within the electric arc furnace, concentrating carbon monoxide within the gas...
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5566200 |
Process and device for disposal of filter materials
A process and low-shaft furnace for disposing of filter material. The material to be disposed of is charged via a charging device onto and/or into a slag bath in the furnace. Simultaneously,...
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5541952 |
Apparatus and method of preheating steel scrap for a twin shell electric arc furnace
Apparatus and methods of abating the objectionable emissions of volatile hydrocarbons generated during the preheating cycle of a twin vessel electric arc furnace steelmaking operation wherein the...
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5535234 |
Process for the simultaneous smelting of dust and incinerator slag
Smeltable dust and pieces of grate slag in the proportions in which they are produced by a garbage incinerator can be disposed of by simultaneously melting them in a low-shaft electric furnace...
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5533043 |
Installation for producing liquid metal by melting scrap iron
An installation for the production of liquid metal by melting a charge of ferrous material, comprising at least one electric melting furnace consisting of a chamber closed by a removable roof and...
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5500870 |
Process and device for the extraction of valuable substances
A process and melting furnace unit are provided for extracting valuable substances by reducing oxygen-bound metals which process includes exposing a charge in a first reaction zone of a furnace...
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5493580 |
Process for recycling the filter dust in an electric arc furnace for producing steel
The present invention relates to a process of recycling filter dust obtained during the production of steel in an electric arc furnace. Filter dust is injected and mixed with the smalls of carbon...
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5487081 |
Process and apparatus for the treatment of the waste gases of an arc furnace
A process is provided for the treatment of waste gases, dust and vapor from a closed arc furnace disposed in a furnace vessel. The furnace vessel contains a charge column, a metal melt and slag...
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5467365 |
Process for the recovery of lead arising especially from the active material of spent batteries, and electric furnace intended especially for the use of the process
An electric furnace (containing an immersed electrode) and a process for the recovery of lead, arising especially from solid residues. Fines, which are a product of physically crushing spent...
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5402439 |
Process and apparatus for disposing of dust-form substances from combustion plants
Dust like substances which are recovered from a garbage or refuse incinerator are destroyed, eliminated or disposed of by smelting in a low shaft electric furnace having at least one electrode...
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5393037 |
Smelting unit with furnace rocking cradle
A smelting unit having a furnace vessel (11) which is mounted on a furnace rocking cradle (13) and which can be closed by a cover (12), and bar electrodes (28) which can be lowered into the furnace...
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5392312 |
Method and device for regulating the combustion air flow rate of a flue rate gas collection device of a metallurgical reactor, corresponding collection device and metallurgical reactor
In order to regulate the combustion air flow rate of a flue gas collection device (1) of a metallurgical reactor (2) comprising a combustion chamber (4) supplied with air by a variable flow fan...
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5343491 |
Method of suppressing dust and fumes during electric steel production
During melting in an electric melting furnace of iron products such as pig iron, scrap iron, directly reduced iron pellets, and various alloy metals, or mixtures of the foregoing having greatly...
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5333146 |
On-site, biohazardous waste disposal system
An incinerator for the disposal of biohazardous waste has a sealed enclosure defining a combustion chamber with upper, first level intermediate, second level intermediate and lower portions. The...
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5291513 |
Method and device for exhausting gases or fumes from a metallurgical container and an electric furnace provided with said exhaust device
The inside of the metallurgical container is connected to a fan (105) through an exhaust duct (102). An additional gas is introduced in the intake part of the fan (105) preferably through the duct...
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5263690 |
Apparatus for metallurgical treatment of molten steel
A unit for the metallurgical treatment of molten steel, located in steel teeming ladles, by heating and vacuum treatment. The ladle-metallurgical treatment unit serves for the mutual treatment of...
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5265117 |
Method of exhausting gases and fumes from an electric arc furnace utilizing additional inlet gas duct ensuring constant pressure
A method for exhausting gases or fumes from a metallurgical container through a duct connected to the intake of a pump while introducing an additional gas stream into the pump is described. The...
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5104096 |
Smelting apparatus for making elemental silicon and alloys thereof
Smelting apparatus for use in making elemental silicon and alloys thereof is disclosed. The apparatus includes an electrometallurgical furnace having a body which includes a reactor external to the...
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4940486 |
Process for treating liquid metals
A process for treating metal comprises applying a positive DC potential to an ionic melt layer disposed on the surface of a liquid metal. The application of this potential provides a plasma phase...
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4922505 |
Plant for utilization of exhaust gases of an electric steel furnace
A plant for the processing of exhaust gases of an electric melting furnace for steel is disclosed, which allows to improve the cleaning of heavy-metal-containing exhaust gases from electric arc...
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4878944 |
Method of treating metallic oxide impregnated dust
A process for treating hazardous particulate generated during a manufacturing process is provided. The process includes the steps of: passing particulate material through at least one duct toward a...
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4865643 |
Smelting process for making elemental silicon and alloys thereof, and apparatus therefor
A smelting process for making elemental silicon and alloys thereof is disclosed. The smelting process is of the electrometallurgical type for producing elemental silicon from silicon dioxide...
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