Patents by Inventor Milorad Pavlicevic
Milorad Pavlicevic has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20180036794Abstract: A mold is provided for the continuous casting of a liquid metal. The mold includes at least one wall (21) that defines at least part of a casting cavity (22) in which to cast the liquid metal. Cooling devices (23) are configured to cool the wall (21) with a cooling liquid by delivering at least a jet (G) of the cooling liquid in a delivery direction incident against at least one portions of an interface surface of the wall (21).Type: ApplicationFiled: February 26, 2016Publication date: February 8, 2018Inventor: Milorad PAVLICEVIC
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Patent number: 8424354Abstract: A hot-rolling plant (50) for the production of metal strips comprising a roughing stand (2), a reheating furnace (3) or a maintenance tunnel for maintaining the temperature of the product, a pre-finishing mill train (4), comprising three or four stands, a finishing mill train (5), comprising two or three stands, for finishing the product, in which the work rolls of one stand are provided with their own motor drive, independent one from each other, so as to allow the peripheral speeds of both of said work rolls to be autonomously varied under rolling load.Type: GrantFiled: April 2, 2007Date of Patent: April 23, 2013Assignee: Danieli & C. Officine Meccaniche S.p.A.Inventors: Milorad Pavlicevic, Alfredo Poloni, Simone Barcherini, Gianluca Bazzaro
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Patent number: 8192566Abstract: A continuous annealing and pickling process of flat cold-rolled products, such as stainless steel strips, to obtain a high surface quality product at high production rates and with a low environmental impact. It comprises the following steps: heating, up to a temperature comprised in the range 650-1050° C., in an atmosphere with an oxygen content comprised in the range from 0.5 to 12%; heating for a time comprised from 10 to 200 sec up to a temperature comprised in the range from 650 to 1200° C. in presence of oxidizing agents and/or inert agents; cooling down to temperatures comprised in the range from 650° C. to ambient temperature in presence of oxidizing agents and/or inert agents; thermochemical or electrolytic descaling and finally possible pickling and/or passivation, by means of the use of pickling baths consisting of mineral acid solutions.Type: GrantFiled: November 14, 2007Date of Patent: June 5, 2012Assignees: Danieli & C. Officine Meccaniche S.p.A., Centro Sviluppo Materiali S.p.A.Inventors: Alessandro Dulcetti, Milorad Pavlicevic, Nicoletta Zacchetti, Alessandra Primavera, Stefano Luperi, Luca Lattanzi, Simone Guanin
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Patent number: 8109283Abstract: An apparatus and process for the dry removal of the scale from the surface of a metal product comprising at least one heating area that does not reduce the specific surface of the material to be treated and does not cause oxidation, at least one reducing area for performing the reaction between a specific reducing gas (normally hydrogen) and at least the scale, at least one cooling area for cooling the metal product, means for heating the metal product, means for heating the reducing gas, means for controlling the fluid dynamics of the boundary layer produced by the flow of said reducing gas over the surface of the metal product, means for removing the reaction products front the reducing gas after the reaction, means for cooling the metal product, and means for removing the reaction products from the treated surface of the metal product.Type: GrantFiled: November 14, 2003Date of Patent: February 7, 2012Assignee: Danieli & C. Officine Meccaniche S.p.A.Inventors: Milorad Pavlicevic, Alfredo Poloni, Alessandra Primavera, Fabio Guastini, Alejandro Sanz Lara, Fabio Vecchiet
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Publication number: 20100242990Abstract: An apparatus and process for the dry removal of the scale from the surface of a metal product comprising at least one heating area that does not reduce the specific surface of the material to be treated and does not cause oxidation, at least one reducing area for performing the reaction between a specific reducing gas (normally hydrogen) and at least the scale, at least one cooling area for cooling the metal product, means for heating the metal product, means for heating the reducing gas, means for controlling the fluid dynamics of the boundary layer produced by the flow of said reducing gas over the surface of the metal product, means for removing the reaction products front the reducing gas after the reaction, means for cooling the metal product, and means for removing the reaction products from the treated surface of the metal product.Type: ApplicationFiled: November 14, 2003Publication date: September 30, 2010Inventors: Milorad Pavlicevic, Alfredo Poloni, Alessandra Primavera, Fabio Guastini, Alejandro Sanz Lara, Fabio Vecchiet
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Publication number: 20100065167Abstract: A continuous annealing and pickling process of flat cold-rolled products, such as stainless steel strips, to obtain a high surface quality product at high production rates and with a low environmental impact. It comprises the following steps: heating, up to a temperature comprised in the range 650-1050° C., in an atmosphere with an oxygen content comprised in the range from 0.5 to 12%; heating for a time comprised from 10 to 200 sec up to a temperature comprised in the range from 650 to 1200° C. in presence of oxidizing agents and/or inert agents; cooling down to temperatures comprised in the range from 650° C. to ambient tempera in presence of oxidizing agents and/or inert agents; thermochemical or electrolytic descaling and finally possible pickling and/or passivation, by means of the use of pickling baths consisting of mineral acid solutions.Type: ApplicationFiled: November 14, 2007Publication date: March 18, 2010Inventors: Alessandro Dulcetti, Milorad Pavlicevic, Nicoletta Zacchetti, Alessandra Primavera, Stefano Luperi, Luca Lattanzi, Simone Guanin
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Publication number: 20090165517Abstract: A hot-rolling plant (50) for the production of metal strips comprising a roughing stand (2), a reheating furnace (3) or a maintenance tunnel for maintaining the temperature of the product, a pre-finishing mill train (4), comprising three or four stands, a finishing mill train (5), comprising two or three stands, for finishing the product, in which the work rolls of one stand are provided with their own motor drive, independent one from each other, so as to allow the peripheral speeds of both of said work rolls to be autonomously varied under rolling load.Type: ApplicationFiled: April 2, 2007Publication date: July 2, 2009Applicant: DANIELI & C. OFFICINE MECCANICHE S.P.A.Inventors: Milorad Pavlicevic, Alfredo Poloni, Simone Barcherini, Gianluca Bazzaro
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Patent number: 7520946Abstract: An apparatus and process for the dry removal of the scale from the surface of a metal product comprising at least one heating area that does not reduce the specific surface of the material to be treated and does not cause oxidation, at least one reducing area for performing the reaction between a specific reducing gas (normally hydrogen) and at least the scale, at least one cooling area for cooling the metal product, means for heating the metal product, means for heating the reducing gas, means for controlling the fluid dynamics of the boundary layer produced by the flow of said reducing gas over the surface of the metal product, means for removing the reaction products from the reducing gas after the reaction, means for cooling the metal product, and means for removing the reaction products from the treated surface of the metal product.Type: GrantFiled: November 14, 2003Date of Patent: April 21, 2009Assignee: Danieli & C. Officine Meccaniche S.p.A.Inventors: Milorad Pavlicevic, Alfredo Poloni, Alessandra Primavera, Fabio Guastini, Alejandro Sanz Lara, Fabio Vecchiet
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Patent number: 7258831Abstract: The following invention relates to an injector-burner for applications in the metalwork field, in particular for use in electric arc furnace melting processes having a frontal head with two series of holes arranged in two concentric crowns, the inner crown of holes used to feed fuel and the outer crown used to supply a supporter of combustion. A central hole is also provided, which is fitted with an oxygen injection nozzle. The holes of the two crowns are divided into groups separated by circular sectors without holes, in order to create a number of flames and are inclined in such a way as to give the gases supplied, and consequentially the flame generated, a rotation around the injector-burner axis. By regulating the flow-rates of the fuel and the supporter of combustion supplied to the various holes, the injector-burner is able to regulate the flame shape in burner mode and also in injection mode, thus guaranteeing optimum performance in all modes.Type: GrantFiled: July 9, 2003Date of Patent: August 21, 2007Assignee: Danieli & C. Officine Meccaniche S.p.A.Inventors: Fabio Vecchiet, Milorad Pavlicevic, Alfredo Poloni
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Patent number: 7140521Abstract: An arrangement and conformation of the discharge openings and channels of a continuous-casting nozzle, together with a specific external profile of the body of the nozzle itself, enable slabs of any thickness, in particular from medium to thin ones, to be cast, which have excellent surface quality and are practically free from inclusions and blowholes.Type: GrantFiled: March 7, 2001Date of Patent: November 28, 2006Assignee: Danieli & C. Officine Meccaniche S.p.A.Inventors: Nuredin Kapaj, Milorad Pavlicevic, Alfredo Poloni, Fabio Vecchiet
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Publication number: 20060163781Abstract: An apparatus and process for the dry removal of the scale from the surface of a metal product comprising at least one heating area that does not reduce the specific surface of the material to be treated and does not cause oxidation, at least one reducing area for performing the reaction between a specific reducing gas (normally hydrogen) and at least the scale, at least one cooling area for cooling the metal product, means for heating the metal product, means for heating the reducing gas, means for controlling the fluid dynamics of the boundary layer produced by the flow of said reducing gas over the surface of the metal product, means for removing the reaction products from the reducing gas after the reaction, means for cooling the metal product, and means for removing the reaction products from the treated surface of the metal product.Type: ApplicationFiled: November 14, 2003Publication date: July 27, 2006Inventors: Milorad Pavlicevic, Alfredo Poloni, Alessandra Primavera, Fabio Guastini, Alejandro Sanz Lara, Fabio Vecchiet
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Patent number: 7004408Abstract: Burner (1) comprising a head (2) with two groups of holes (4?, 4?) for the passage of fuel and comburent arranged in circles concentric to the burner axis, in which the various groups (5) of holes are separated by circular sectors without holes and the axes of the holes are oblique compared with the burner axis (X) to create special forms of flame.Type: GrantFiled: March 21, 2003Date of Patent: February 28, 2006Assignee: Danieli & C. Officine Meccaniche S.p.A.Inventors: Fabio Vecchiet, Milorad Pavlicevic, Alfredo Poloni
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Publication number: 20060038326Abstract: The following invention relates to an injector-burner for applications in the metalwork field, in particular for use in electric arc furnace melting processes having a frontal head with two series of holes arranged in two concentric crowns, the inner crown of holes used to feed fuel and the outer crown used to supply a supporter of combustion. A central hole is also provided, which is fitted with an oxygen injection nozzle. The holes of the two crowns are divided into groups separated by circular sectors without holes, in order to create a number of flames and are inclined in such a way as to give the gases supplied, and consequentially the flame generated, a rotation around the injector-burner axis. By regulating the flow-rates of the fuel and the supporter of combustion supplied to the various holes, the injector-burner is able to regulate the flame shape in burner mode and also in injection mode, thus guaranteeing optimum performance in all modes.Type: ApplicationFiled: July 9, 2003Publication date: February 23, 2006Inventors: Fabio Vecchiet, Milorad Pavlicevic, Alfredo Poloni
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Publication number: 20050173566Abstract: Burner (1) comprising a head (2) with two groups of holes (4?, 4?) for the passage of fuel and comburent arranged in circles concentric to the burner axis, in which the various groups (5) of holes are separated by circular sectors without holes and the axes of the holes are oblique compared with the burner axis (X) to create special forms of flame.Type: ApplicationFiled: March 21, 2003Publication date: August 11, 2005Inventors: Fabio Vecchiet, Milorad Pavlicevic, Alfredo Poloni
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Publication number: 20030141324Abstract: A particular arrangement and conformation of the discharge openings and channels of a continuous-casting nozzle, together with a specific external profile of the body of the nozzle itselfs, enable slabs of any thickness, in particular from medium to thin ones, to be cast, which have excellent surface quality and are practically free from inclusions and blowholes.Type: ApplicationFiled: November 21, 2002Publication date: July 31, 2003Inventors: Nuredin Kapaj, Milorad Pavlicevic, Alfredo Poloni, Fabio Vecchiet
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Patent number: 6535543Abstract: 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 discharge the fumes. The device also has a first cooling system (13) for a central zone surrounding, and cooperating with, the central aperture (11), and a second system (15) to take in and convey the fumes. The first cooling system (13) includes a circular cyclone chamber (18) having a plurality of turns (19) able to cool the zone surrounding the central aperture (11).Type: GrantFiled: August 27, 2001Date of Patent: March 18, 2003Assignee: Danieli & C. Officine Meccaniche S.p.A.Inventors: Peter Tischenko, Angelico Della Negra, Milorad Pavlicevic, Alfredo Poloni
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Patent number: 6520246Abstract: Device and corresponding method for the continuous casting of molten materials, comprising a vertical duct having the shape of a funnel made of refractory material for receiving molten material, and a second duct where the molten material is cooled off, the two ducts being set one on top of the other and being axially aligned. The molten material is injected into the channel, around a stretch of which electromagnetic means are set for generating magnetic forces on the molten material, the said means consisting of a plurality of windings of electrically conductive material and of a ferromagnetic core and may be electrically supplied to produce a magnetic flux along the direction of the channel, thus producing a set of forces acting on the molten material which are directed orthogonally with respect to the direction of the said magnetic flux so as to maintain detachment of the outer surface of the molten material from the walls of the channel.Type: GrantFiled: February 14, 2001Date of Patent: February 18, 2003Assignee: Danieli & C. Officine Meccaniche S.p.A.Inventors: Alfredo Poloni, Milorad Pavlicevic, Anatoly Kolesnichenko, Andrea Codutti
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Publication number: 20020079625Abstract: A gravitational furnace for the direct reduction of mineral iron, comprising a substantially cylindrical container, a reactor arranged in a median zone of the container, between a device to feed the mineral iron and a zone to discharge the reduced metal iron. Distribution nozzles are provided in the peripheral wall of the cylinder to introduce reducing gas into the reactor. A substantially cylindrical passive element is inserted into the furnace inside the container, substantially coaxial with its longitudinal axis, to define a substantially annular reaction chamber of the reactor. Also the manufacturing of the furnace is disclosed.Type: ApplicationFiled: November 9, 2001Publication date: June 27, 2002Inventors: Milorad Pavlicevic, Alfredo Poloni, Ljuban Milic, Alessandra Primavera
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Patent number: 6403022Abstract: Device for the direct reduction of iron oxides of the type with a gravitational load, comprising a reactor defining, in its upper part, at least a zone inside which the reduction reaction occurs, means (14, 15) to introduce the load through a mouth (12) of the reactor, means (18, 17, 19) to introduce a current of gas into at least one section of the reactor in correspondence with the reduction zone, outlet means (13) of the reduced material from the bottom of the reactor, and means (20) to discharge the exhaust fumes, said reactor (10) including at least a first upper zone (10a) of heating, pre-reduction and final reduction, with a taper diverging downwards, and a second lower zone (10b) of carburization and cooling, with a taper converging downwards.Type: GrantFiled: August 31, 2000Date of Patent: June 11, 2002Assignee: Danieli & C. Officine MeccanicheInventors: Milorad Pavlicevic, Alfredo Poloni, Ljuban Milic
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Patent number: 6382303Abstract: Continuous casting device and method with rollers for plane products such as strip (13) or sheet, comprising counter-rotating rollers (11) immersed in a receptacle (14) containing molten metal (15), said receptacle (14) including a bottom (114) and side walls (214), said rollers (11) being arranged parallel and adjacent to define a transit gap (12) through which the strip (13) to be produced is extracted, the device comprising holding elements (19) of the electromagnetic type arranged in cooperation with each of the ends of said rollers (11), said holding elements (19) having an inner edge, an outer edge and a curved shape suitable to surround, without contact, at least partly the surface of said rollers (11) immersed in said molten metal (15), said holding elements (19) comprising at least a coil (29) suitable to be passed through by an alternating current to generate a magnetic field in said molten metal (15) and generating currents induced therein in order to obtain the lateral confinement of said molten mType: GrantFiled: August 31, 2000Date of Patent: May 7, 2002Assignee: Danieli & C. Officine Meccaniche SpAInventors: Milorad Pavlicevic, Anatoly Kolesnichenko, Alfredo Poloni, Andrea Codutti