Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 7229495 | Silicon wafer and method for producing silicon single crystal A method for growing a silicon single crystal ingot by a Czochralski method, which is capable of providing silicon wafers having very uniform in-plane quality and which results in improvement of semiconductor device yield. A method is provided for producing a silico... | 06/12/2007 |
| 7172640 | Method and device for melting down metal-containing materials In a method and a device for melting down metal-containing material, preferably fine-particulate metal-containing material, such as sponge iron, in a metallurgical melting furnace (1), wherein, in an interior space (11) of the melting furnace (1... | 02/06/2007 |
| 7165599 | Melting and feeding method and apparatus of metallic material in metal molding machine In a metal molding machine provided having a tilt to a clamping device with an injection unit which is constituted by a liquid metallic material reservoir in which a cylinder having a nozzle portion at the tip portion equipped with a heating device at the outer peri... | 01/23/2007 |
| 7037462 | Overflow transfer furnace and control system for reduced oxide production in a casting furnace An apparatus for transferring molten metal from a melting furnace to a casting furnace is provided. A sensing and control system for the transfer of molten metal from a transfer furnace to a casting furnace is also described. The combination of the transfer apparatu... | 05/02/2006 |
| 6953337 | Transfer of hot feed materials from a preprocessing plant to an electric smelting or melting furnace Apparatus for transferring hot material between a preprocessing plant and an electric furnace has an enclosed housing extending between the plant and the furnace and within which a controlled atmosphere is maintained, at least one bin having at least one compartment... | 10/11/2005 |
| 6948930 | Furnace head or furnace throat seal A blast furnace head (11) including a material loading device comprising rotary chute (14) driven in rotation about a first, vertical axis of rotation (16), and a loading chute (15) at the outlet of same, driven in rotation about a second... | 09/27/2005 |
| 6902696 | Overflow transfer furnace and control system for reduced oxide production in a casting furnace An apparatus for transferring molten metal from a melting furnace to a casting furnace is provided. A sensing and control system for the transfer of molten metal from a transfer furnace to a casting furnace is also described. The combination of the transfer apparatu... | 06/07/2005 |
| 6801563 | Apparatus to manipulate scrap in a scrap charger A scrap charging apparatus for an electric arc furnace includes a scrap holding bunker having diverging side walls extending between end walls separated by a scrap discharge opening supplying scrap from a fall space in the bunker to a scrap discharge chute. The end ... | 10/05/2004 |
| 6719944 | Method and apparatus for deslagging and tapping an integrated electric steel making furnace An electric steel-making furnace has a furnace roof carried by an upper furnace shell on a lower furnace shell to substantially envelop an atmosphere above liquid steel and slag floating thereon in the lower furnace shell. A transfer car supports the lower furnace s... | 04/13/2004 |
| 6693947 | Method to protect the anode bottoms in batch DC electric arc furnace steel production A batch process for an electric arc furnace (1) to manufacture steel (10) includes the steps of providing an empty furnace having a bottom (14) and sides (16) and electrodes (2, 3); adding molten metal to the empty furnace; adding other necessary ingredie... | 02/17/2004 |
| 6580744 | Feed device for a shaft furnace Feed device (100) for a shaft furnace (101), with a revolving chute (107, 111) comprising a cylindrical basic body (107) that can be driven so as to rotate about a first, substantially vertically oriented axis of rotation (A1) with a first drive mechanism... | 06/17/2003 |
| 6574264 | Apparatus for growing a silicon ingot An apparatus for growing a silicon ingot including a graphite crucible in which a quartz crucible is placed, a driving axis connected to a lower part of the graphite crucible to revolve and move the graphite crucible up and down so as to support the graph... | 06/03/2003 |
| 6574263 | Method for charging anode into furnace and method for designing furnace A method, for charging anode(s) into a furnace, comprises bending anode(s) having a roughly rectangular plate shape at the end of the charging direction, and charging the anode(s) into a melt stored in the furnace through a slope. When the depth of melt i... | 06/03/2003 |
| 6473446 | Electric furnace for steel making An electric furnace includes a stationary lower shell having a sloping floor extending downwardly to a tap hole to always maintain a sufficient ferrostatic head three times the tap hole for slag free tapping. The configuration of the refractory for contai... | 10/29/2002 |
| 6450804 | Compact continuous charging apparatus An improved method and apparatus for charging, preheating and refining steel. The charging apparatus has a skirted charging section for introducing charge materials, a dynamic gas seal adjacent the charging section and a preheater, the preheater for prehe... | 09/17/2002 |
| 6452955 | Method for feeding fines or granules into a light-arc furnace A method for feeding fines or granules into a light-arc furnace. A hollow electrode provided with a feeding channel is utilized, and is preferably a hollow Soderberg electrode. A conveyor introduces the fines or granules into the feeding channel so as to ... | 09/17/2002 |
| 6426969 | Discharge screw for moving hearth Discharge screw (6) for a moving hearth, and in particular for an annular rotary hearth (2) of a reheat furnace for the heat treatment of loose materials, comprising a cylinder (61) arranged above and substantially radially with respect to this annular he... | 07/30/2002 |
| 6389054 | Scrap charger A scrap charging apparatus for an electric arc furnace uses a skip hoist to supply scrap to a holding bunker having diverging end walls extending between converging side walls. The containment space for the scrap is increased by this wall arrangement and ... | 05/14/2002 |
| 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 being possible for a charging apparatus to be set down on th... | 02/12/2002 |
| 6335945 | Electric ARC low-shaft smelting furnace with a central tube with telescopic electrodes and a sliding upper receptacle lid A smelting furnace system for smelting metals, especially steel scrap, with a lower furnace vessel, in the bottom of which a tap hole is provided, and with an upper furnace vessel, which can be closed by a cover, in which a central pipe is provided coaxia... | 01/01/2002 |
| 6274081 | Smelting installation with an electric-arc furnace 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 another relative to the ... | 08/14/2001 |
| 6201826 | Loading system for electric arc furnaces Loading system for an electric arc furnace (11) includes a loading station (20a), a pre-heating station (20b) and a pick-up and moving device (15) provided with an arm (17) rotating on a circumference on which the furnace (11), the loading station (20a) a... | 03/13/2001 |
| 6178192 | Raw material heating apparatus A raw-material heating apparatus in which raw-material supplying pipes and exhaust pipes are disposed in a peripheral portion of a furnace cover, a heating space is formed by the furnace cover, a peripheral wall, and a hearth, a raw material which is supp... | 01/23/2001 |
| 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 a movable covering system (16) and including a containing ... | 12/19/2000 |
| 6157665 | Method to load scrap for electric arc furnace and relative system 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 (16), the scrap (... | 12/05/2000 |
| 6157664 | System to load pre-heated scrap by means of baskets for electric arc furnace 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) being associated wit... | 12/05/2000 |
| 6157667 | Method and calcining furnace for electric calcining of carbonaceous material An electric furnace and method thereof for electric calcining of carbonaceous material for the production of graphite or graphite-containing material, wherein the carbonaceous material is supplied to the top of a vertically arranged furnace having a cylin... | 12/05/2000 |
| 6052403 | Inductor in a fusion tank An inductor is used to generate an electromagnetic AC field at a pipe-in-pipe discharge element of a metallurgical vessel. The inductor has at least two cooling fluid regions for the flow of cooling fluid therethrough. First supply and drain lines are con... | 04/18/2000 |
| 5925165 | Process and apparatus for the 3-stage treatment of solid residues from refuse incineration plants In a method for processing solid residues from refuse incineration plants the slag is melted and heavy metals from the melt (16) are separated for reutilization. The slag is directly transferred from the refuse incineration plant into a first heating cham... | 07/20/1999 |
| 5898726 | Preheater for arc furnaces To provide a pre-heating apparatus capable of improving the installation reliability of a raw material holding gate of a pre-heating apparatus, reducing an installation cost and reducing melting electric power energy without deteriorating an operation env... | 04/27/1999 |
| 5887016 | Charging device for arc furnaces A charging device for closed arc furnaces having at least one electrode around which the charge material is concentrically fed into the furnace. Conveyor devices run in protected fashion in an annular chamber disposed above a furnace cover. A plurality of... | 03/23/1999 |
| 5883918 | Oxy:fuel melting furnace An oxy:fuel melting furnace (2) comprising a rotatable furnace body (4), a normally stationary non-rotatable furnace roof (6) for fitting on the furnace body (4), dynamic sealing means (8) for dynamically sealing the furnace roof (6) on the furnace body (... | 03/16/1999 |
| 5835524 | Scrap-melting electric arc furnace A scrap-melting electric arc furnace operating at an elevated melting power having a simple construction that also avoids thermal loads of the side wall caused by the electrodes. The electrodes are protected from damage during scrap-charging. The electric... | 11/10/1998 |
| 5812586 | Method and apparatus for removing a molten slag with a vacuum from a chamber Slag from a pool of molten slag floating on molten metal in a plasma arc treatment chamber is removed by providing a slag container located inside the chamber which has a slag intake pipe extending from a bottom of the container downwardly into the slag p... | 09/22/1998 |
| 5812587 | Apparatus and method for the supply of molten metal The present invention is concerned with an apparatus for supply of molten metal including a holding furnace pivotable about an axis having a metal chamber for holding molten metal, an outlet for supplying molten metal from said chamber and an inlet well c... | 09/22/1998 |
| 5800591 | Method and apparatus for feeding a steelmaking furnace A heat processing furnace is provided with a bifurcated feeder which allows scrap steel to be introduced to the furnace from an associated preheater, and direct reduced iron, slag formers, carburizers, and other alloys to be introduced through a lower cha... | 09/01/1998 |
| 5715272 | Device for charging an electric furnace Charging device for supplying liquid metal to an electric furnace with a shaft 15, the device consisting of a balcony 19 extending the shaft 15 of the furnace 10 laterally and communicating with the hearth of the furnace 10.... | 02/03/1998 |
| 5694413 | Procedure and apparatus for continuous supply of heat in electrically conductive bulk goods The invention relates to a procedure for continuous supply of heat into electrically conductive bulk goods by exploiting the electrical resistance thereof in an oven chamber with an inlet opening and a drawing-off apparatus for continuous throughput of bu... | 12/02/1997 |
| 5673285 | Concentric electrode DC arc systems and their use in processing waste materials An electrode assembly comprising concentric tubular electrodes is provided for high temperature processing of materials. The electrode assembly is connected with a power supply that includes switching means for alternatively operating the electrode assemb... | 09/30/1997 |
| 5654976 | Method for melting ferrous scrap metal and chromite in a submerged arc furnace to produce a chromium containing iron The process feeds a mixture of scrap metal, chromite, flux materials, carbonaceous material and wood chips to a submerged arc furnace to make a base iron suitable for iron and steel purposes. The mixture contains about 1-60% chromite, about 1 to 20% flux ... | 08/05/1997 |
