| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 164466000 | Utilizing magnetic force | 23 |
| 20090120604 | Method And Apparatus For Controlling The Flow Of Molten Steel In A Mould - A method for controlling a flow of molten steel in a mould by applying at least one magnetic field to the molten steel in a continuous slab casting machine. This is achieved by comprising controlling a molten steel flow velocity on a molten steel bath surface, meniscus, to a predetermined molten steel flow velocity by applying a static magnetic field to impart a stabilizing and braking force to a discharge flow from an immersion nozzle when the molten steel flow velocity on the meniscus is higher than a mould powder entrainment critical flow velocity and by controlling the molten steel flow velocity on the meniscus to a range of from an inclusion adherence critical flow velocity or more to a mould powder entrainment critical flow velocity or less by applying a shifting magnetic field to increase the molten steel flow when the molten steel flow velocity on the meniscus is lower than the inclusion-adherence critical flow velocity. | 05-14-2009 |
| 20090236069 | Method for controlling flow of molten steel in mold and method for continuously producing a cast product - A method for controlling a flow of molten steel in a slab continuous casting machine including controlling a molten steel flow velocity on a molten steel bath surface to a predetermined flow velocity by applying a shifting magnetic field; controlling the molten steel flow velocity on the molten steel bath surface from an inclusion-adherence critical flow velocity or more to a mold-powder entrainment critical flow velocity or less by applying a shifting magnetic field; and controlling the molten steel flow velocity on the molten steel bath surface from the inclusion-adherence critical flow velocity or more to the mold-powder entrainment critical flow velocity or less by applying a shifting magnetic field. | 09-24-2009 |
| 20110162817 | ELECTROMAGNETIC BRAKING DEVICE ON CONTINUOUS CASTING MOLDS - To bring about a direct effect on the fluid streams exiting the mould dip tube ( | 07-07-2011 |
| 20130133852 | PROCESS AND APPARATUS FOR CONTROLLING THE FLOWS OF LIQUID METAL IN A CRYSTALLIZER FOR THE CONTINUOUS CASTING OF THIN FLAT SLABS - The present invention relates to a process for controlling the distribution of liquid metal flows of in a crystallizer for the continuous casting of thin slabs. In particular, the process applies to a crystallizer comprising perimetral walls which define a containment volume for a liquid metal bath insertable through a discharger placed in the middle of the bath. The process includes arranging a plurality of electromagnetic brakes, each for generating a braking zone within said bath, and activating these electro-magnetic brakes either independently or in groups according to characteristic parameters of the fluid-dynamic conditions of the liquid metal within the bath. | 05-30-2013 |
| 20130233505 | CONTINUOUS CASTING METHOD FOR STEEL AND METHOD FOR MANUFACTURING STEEL SHEET - In a method for continuously casting an extremely low carbon steel using a continuous casting machine, by adjusting the chemical components of extremely low carbon steel within a specified range by taking into account an interface tension gradient in a concentration boundary layer on a front surface of a solidified shell, and also by optimizing intensities of the DC magnetic fields applied to the upper magnetic poles and the lower magnetic poles respectively corresponding to a slab width of a slab to be casted and a casting speed, it is possible to acquire the slab having high quality not only with the small number of defects caused by the entrainment of bubbles, non-metallic inclusion and a mold flux into the molten steel. | 09-12-2013 |
| 20140326427 | METHOD AND APPARATUS FOR REDUCING BUBBLES OR GAS POCKETS IN A METAL INGOT USING A CONTINUOUS CASTING MOLD - A method and apparatus are provided to cast a metal ingot using a continuous casting mold so that the ingot is essentially free of gas pockets which otherwise would result from gas bubbles being entrapped in the mushy zone and solid portion of the ingot during formation, wherein such bubbles may be caused by pouring molten metal into a molten liquid portion of the forming ingot and by impingement of a plasma plume of a plasma torch on the upper surface of the molten liquid portion. | 11-06-2014 |
| 20150375295 | PROCESS AND APPARATUS FOR CONTROLLING THE FLOWS OF LIQUID METAL IN A CRYSTALLIZER FOR THE CONTINUOUS CASTING OF THIN FLAT SLABS - The present invention relates to a process for controlling the distribution of liquid metal flows of in a crystallizer for the continuous casting of thin slabs. In particular, the process applies to a crystallizer comprising perimetral walls which define a containment volume for a liquid metal bath insertable through a discharger placed in the middle of the bath. The process includes arranging a plurality of electromagnetic brakes, each for generating a braking zone within said bath, and activating these electromagnetic brakes either independently or in groups according to characteristic parameters of the fluid-dynamic conditions of the liquid metal within the bath. | 12-31-2015 |
| 164467000 | Molten metal shaped by electromagnetic field | 2 |
| 20100059197 | CONTINUOUS CASTING METHOD OF MOLTEN METAL - The present invention provides a continuous casting method of molten metal using electromagnetic force to improve the cast slab surface properties and reduce the nonmetallic inclusions and bubbles trapped inside the cast slab. An alternating current is run through an electromagnetic coil | 03-11-2010 |
| 20150034269 | PULLING-UP-TYPE CONTINUOUS CASTING APPARATUS AND PULLING-UP-TYPE CONTINUOUS CASTING METHOD - A pulling-up-type continuous casting apparatus that lets molten metal solidify while pulling up a drawing section for drawing the molten metal from a molten-metal surface of the molten metal held in a holding furnace, and thereby shapes the molten metal, includes means for applying a non-contact force to held molten metal, the held molten metal being molten metal that has been drawn from the molten-metal surface by the drawing section but has not solidified yet. | 02-05-2015 |
| 164468000 | Applying electromagnetic stirring force to molten metal within mold or product | 14 |
| 20080236780 | Adjusting the Mode of Electromagnetic Stirring Over the Height of a Continous Casting Mould - In a mold for the continuous casting of flat metal products with a submerged nozzle having lateral outlets, said mold being equipped on each of its long sides | 10-02-2008 |
| 20080251231 | METHOD AND APPARATUS FOR THE CONTINUOUS CASTING OF PRELIMINARY STEEL SECTIONS - In a method and apparatus for the continuous casting of preliminary steel sections, the liquid or molten steel is introduced substantially vertically into an open-ended die. The cross section of the cavity of the die is made up of a web part and one or more flange parts, for example, such as in preliminary double-T sections. The liquid core of the strand of the preliminary section is set in agitating motions transversely to the direction of continuous casting by selectively using electromagnetically-induced forces in the regions of the flange parts and/or of the web part. The agitating motions have the effect of exchanging the liquid steel in the molten crater of the strand of the preliminary section in and between flange parts and the web part. This allows the flow and temperature conditions in the liquid steel crater within the strand of the preliminary section to be actively influenced in a targeted manner and stabilization of the region of the surface of the liquid metal to be brought about, along with favorable and controllable flow conditions. | 10-16-2008 |
| 20090183851 | PROCESS FOR THE CONTINUOUS CASTING OF FLAT METAL PRODUCTS WITH ELECTROMAGNETIC STIRRING AND IMPLEMENTATION INSTALLATION - A process for continuous casting of slabs or other metal products of elongate cross section, for example made of steel, in which a molten metal is poured into a cooled mold, and the externally solidified product is continuously extracted from the mold and guided in a secondary cooling zone downstream of the mold. To obtain a cast product exhibiting predominantly equiaxed solidification, the product extracted from the mold is subjected to electromagnetic stirring in segment zero of the secondary cooling zone by at least two stirrer-rolls incorporated into the segment zero. | 07-23-2009 |
| 20090229783 | METHOD AND SYSTEM OF ELECTROMAGNETIC STIRRING FOR CONTINUOUS CASTING OF MEDIUM AND HIGH CARBON STEELS - A method and an apparatus are provided for electromagnetic stirring during a continuous casting process, especially for casting a billet and bloom of medium and high carbon steels. The method and apparatus provide a higher surface quality of the ingot, reduce the entrapping of nonmetallic inclusions into the ingot, and suppress issues regarding central segregation and central porosity. The method provides an improvement in the stirring process from the meniscus to the crater end—and relates to in-mold stirring and stirring in a zone of secondary cooling and up to the crater end. The in-mold stirring is geared towards the suppression of meniscus disturbance, for submerged casting, in particular, the reducing of helical and axial velocity components of the molten steel, the lowering of the initial solidification point to avoid the touching of a shell edge with the slag ring, and a decrease of oscillation marks. | 09-17-2009 |
| 20090266505 | Continuous casting method of steel - The present invention provides a continuous casting method of steel preventing alumina and other nonmetallic inclusions becoming causes of slivers and argon bubbles becoming causes of blowholes from being entrained and thereby enabling the production of a cast slab superior in surface and internal quality, that is, one giving an inside bore | 10-29-2009 |
| 20090294091 | Continuous Casting Device - A continuous casting device includes a mould, a nozzle, and an electromagnetic stirrer provided around the nozzle above the mould, the stirrer including a core of a magnetic material that extends circumferentially around the nozzle and a plurality of windings wound around the core. The windings are wound around a cross section of the core as seen in the circumferential direction of the core. | 12-03-2009 |
| 20100263822 | METHOD AND ASSOCIATED ELECTROMAGNETIC APPARATUS FOR ROTATING MOLTEN METAL IN A SLABS CONTINUOUS CASTING INGOT MOULD - Four distinct polyphased inductors ( | 10-21-2010 |
| 20110094703 | METHOD OF CONTINUOUS CASTING OF HIGH-ALUMINUM STEEL AND MOLD POWDER - The invention provides a method of continuous casting for producing a slab excellent in surface quality by preventing formation of depressions and occurrence of cracking of a slab even in the case of producing a high Al steel having an Al content of 0.1% or more by continuous casting. At the time of continuous casting of a high-Al molten steel containing prescribed chemical components by using a mold powder, a powder containing T—CaO: 35 to 55%, SiO | 04-28-2011 |
| 20120199308 | STIRRER - A method for casting of metal. A mold is provided including two broad sides and two narrow sides. A molten metal is introduced into the mold. There is a meniscus at a top of the molten metal. Additional molten metal is supplied into the molten metal via a casting tube below the meniscus. At least one stirrer including an iron core and a coil applied around the iron core is arranged around the mold. A length of the iron core in relation to a length of the broad side of the mold is between 50% and 80% of the length of the broad side. An upper part of the iron core is positioned from 50 mm above to 195 mm below the surface of the meniscus. A magnetic field is applied to the molten metal with the at least one stirrer to stir the molten metal. | 08-09-2012 |
| 20120227924 | STEEL CONTINUOUS CASTING METHOD - A steel continuous casting method using a continuous caster that includes a pair of upper magnetic poles and a pair of lower magnetic poles is disclosed. The method comprises braking a molten steel flow with the DC magnetic fields respectively applied to the pair of upper magnetic poles and the pair of lower magnetic poles while stirring a molten steel with an AC magnetic field simultaneously applied to the pair of upper magnetic poles, the strength of an AC magnetic field applied to the upper magnetic poles is set within the range of 0.060 to 0.090 T and the strengths of DC magnetic fields applied to the upper and lower magnetic poles are controlled within particular ranges in accordance with the width of the slab to be cast and the casting speed. | 09-13-2012 |
| 20120291982 | STEEL CONTINUOUS CASTING METHOD - A steel continuous casting method using a continuous caster that includes a pair of upper magnetic poles and a pair of lower magnetic poles is disclosed. The method comprises braking a molten steel flow with DC magnetic fields respectively applied to a pair of upper magnetic poles and a pair of lower magnetic poles while stirring the molten steel with an AC magnetic field simultaneously applied to the pair of upper magnetic poles, the strength of an AC magnetic field applied to the upper magnetic poles and strengths of DC magnetic fields applied to the upper magnetic poles and the lower magnetic poles are controlled within a particular ranges in accordance with the width of a slab to be cast. | 11-22-2012 |
| 20130008624 | STIRRING-ROLLER FOR A CONTINUOUS SLAB-CASTING MACHINE - A split stirring roll including two half-rolls aligned at a distance from one another, each incorporating a polyphase linear inductor mounted fixedly a short distance from outer tubular bodies of each half-roll to arrange between them an annular space for circulation of a cooling fluid; each inductor can generate a traveling magnetic field sliding along the width of a cast slab. The two half-rolls are mounted externally in end rolling bearings and internally in a common intermediate rolling bearing attached between them, the inductors including narrowed-diameter hollow terminal portions to rest in the three rolling bearings and communicate with a cooling circuit including the annular spaces. The split stirring roll is configured for continuous casting of extra-wide slabs and can form a preferred tool for controlled electromagnetic stirring of molten metal for optimized exchange of material between a top and bottom of a casting machine. | 01-10-2013 |
| 20150306660 | CONTINUOUS CASTING METHOD FOR SLAB MADE OF TITANIUM OR TITANIUM ALLOY - A continuous casting method in which a molten metal obtained by melting titanium or a titanium alloy is injected into a bottomless mold having a rectangular cross-section and withdrawn downward while being caused to solidify, wherein a plasma torch ( | 10-29-2015 |
| 20160052050 | METHOD AND APPARATUS FOR MOVING MOLTEN METAL - Methods and apparatus for moving a molten metal are provided in which the electromagnetic inductor includes at least two pairs of electromagnetic pole pairs and in which a first magnetic field component is generated between one pole in a first electromagnetic pole pair and a second pole in a different electromagnetic pole pair, and in which a second magnetic field component is generated between the two poles in one or more electromagnetic pole pairs, the second magnetic field component thereby generating one or more eddy currents in the molten metal. Those eddy currents are generally parallel to the surface of the molten metal and so have greater magnitude and extent that eddy currents perpendicular to the surface. Such eddy currents provide useful additional movement to the molten metal, for instance for stirring purposes, particularly when the depth of molten metal is small. | 02-25-2016 |
