Patents Assigned to Luossavaara-Kiirunavaara AB
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Patent number: 9719152Abstract: A method includes the introduction of a first medium into the compartment through an inlet and the heating of the first medium when it is present in the inlet. The heating takes place through the use of a combustion arrangement that is arranged in the inlet and that comprises fuel. The heating, the use of the combustion arrangement, includes in turn the ignition of the fuel, combustion of the fuel, and the transfer of the combustion heat to the first medium that is present at the combustion arrangement in the inlet. The combustion arrangement, is arranged in a region in the inlet, which in turn is arranged outside of the direct passage of the first medium in and through the inlet, such that the ignition of the fuel, the combustion of the fuel and the transfer of combustion heat to the first medium take place in this region.Type: GrantFiled: May 26, 2015Date of Patent: August 1, 2017Assignee: LUOSSAVAARA-KIIRUNAVAARA ABInventors: Christian Fredriksson, Stefan Savonen
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Rotor machine intended to function as a pump or an agitator and an impeller for such a rotor machine
Patent number: 9546661Abstract: The invention concerns a rotor machine and an impeller, of which the rotor machine is intended to function as a liquid pump or as an agitator in a fluid such as a liquid or a colloid, whereby the rotor machine has a pump casing (1) with an impeller (2) mounted in bearings in a manner that allows rotation around an axis (X), and in which the rotor machine has three principal flow pathways, comprising: —an axial inlet opening (4) with a defined area of opening (Ain) —a radially oriented outlet opening (5) with a defined area of opening (Aut), and —a series of radially extending blades (3) that, distributed around the circumference of the impeller, form between them a number of flow channels (22:1-22:n).Type: GrantFiled: May 8, 2012Date of Patent: January 17, 2017Assignee: Luossavaara-Kiirunavaara ABInventors: Ola Eriksson, Daniel Marjavaara -
Publication number: 20150252444Abstract: A method includes the introduction of a first medium into the compartment through an inlet and the heating of the first medium when it is present in the inlet. The heating takes place through the use of a combustion arrangement that is arranged in the inlet and that comprises fuel. The heating, the use of the combustion arrangement, includes in turn the ignition of the fuel, combustion of the fuel, and the transfer of the combustion heat to the first medium that is present at the combustion arrangement in the inlet. The combustion arrangement, is arranged in a region in the inlet, which in turn is arranged outside of the direct passage of the first medium in and through the inlet, such that the ignition of the fuel, the combustion of the fuel and the transfer of combustion heat to the first medium take place in this region.Type: ApplicationFiled: May 26, 2015Publication date: September 10, 2015Applicant: LUOSSAVAARA-KIIRUNAVAARA ABInventors: Christian FREDRIKSSON, Stefan SAVONEN
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Patent number: 9068243Abstract: A method includes the introduction of a first medium into the compartment through an inlet and the heating of the first medium when it is present in the inlet. The heating takes place through the use of a combustion arrangement that is arranged in the inlet and that comprises fuel. The heating, the use of the combustion arrangement, includes in turn the ignition of the fuel, combustion of the fuel, and the transfer of the combustion heat to the first medium that is present at the combustion arrangement in the inlet. The combustion arrangement, is arranged in a region in the inlet, which in turn is arranged outside of the direct passage of the first medium in and through the inlet, such that the ignition of the fuel, the combustion of the fuel and the transfer of combustion heat to the first medium take place in this region.Type: GrantFiled: October 26, 2011Date of Patent: June 30, 2015Assignee: LUOSSAVAARA-KIIRUNAVAARA ABInventors: Christian Fredriksson, Stefan Savonen
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Patent number: 9023127Abstract: A method during the oxidation and sintering of pellets includes the introduction of a first medium into the compartment through an inlet connected to the compartment and the heating of the first medium in the inlet through the use of a combustion arrangement. The use of the combustion arrangement includes the ignition of the fuel, combustion of the fuel, and the transfer of the combustion heat to the first medium that is present at the combustion arrangement. A second medium is introduced to the inlet through an intake in the direct vicinity of the combustion arrangement, where the ignition of the fuel and the combustion of the fuel take place for the transfer of combustion heat also to the second medium. The heated first medium and the heated second medium are mixed before or during their introduction into the compartment.Type: GrantFiled: October 26, 2011Date of Patent: May 5, 2015Assignee: Luossavaara-Kiirunavaara ABInventors: Christian Fredriksson, Stefan Savonen
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Patent number: 9011571Abstract: A method for the oxidation and sintering of pellets includes the introduction of a first medium into a compartment through an inlet connected to the compartment and the heating of the medium in the inlet through the use of a combustion arrangement. The use of the combustion arrangement includes the ignition of the fuel, the combustion of the fuel, and the transfer of combustion heat to the first medium that is present at the combustion arrangement. In a region in the inlet outside the direct passage of the first medium, the ignition of the fuel, the combustion of the fuel and the transfer of combustion heat to the first medium take place. By the introduction of a second medium into the region in the direct vicinity of the combustion arrangement, the combustion of the fuel and the transfer of combustion heat also to the second medium take place.Type: GrantFiled: October 26, 2011Date of Patent: April 21, 2015Assignee: Luossavaara-Kiirunavaara ABInventors: Christian Fredriksson, Stefan Savonen
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Patent number: 8709128Abstract: The present invention relates to a process for the direct reduction of iron ore performed by means of a plant comprising a gravitational furnace (2) having at least one iron ore reduction zone (8) in the upper part thereof, and at least one carbon deposition zone (9) and one reduced metal product cooling zone (10) in the lower part thereof, and means for feeding a reducing gas mixture into the reactor in correspondence to the with the reduction zone, means for recycle exhaust or reactor off gas from the reactor to syngas and mixing the recycled gas with natural gas to form a reducing gas mixture.Type: GrantFiled: September 22, 2009Date of Patent: April 29, 2014Assignee: Luossavaara-Kiirunavaara ABInventors: Klaus Knop, Sten Ångström
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ROTOR MACHINE INTENDED TO FUNCTION AS A PUMP OR AN AGITATOR AND AN IMPELLER FOR SUCH A ROTOR MACHINE
Publication number: 20140064947Abstract: The invention concerns a rotor machine and an impeller, of which the rotor machine is intended to function as a liquid pump or as an agitator in a fluid such as a liquid or a colloid, whereby the rotor machine has a pump casing (1) with an impeller (2) mounted in bearings in a manner that allows rotation around an axis (X), and in which the rotor machine has three principal flow pathways, comprising: —an axial inlet opening (4) with a defined area of opening (Ain) —a radially oriented outlet opening (5) with a defined area of opening (Aut), and —a series of radially extending blades (3) that, distributed around the circumference of the impeller, form between them a number of flow channels (22:1-22:n).Type: ApplicationFiled: May 8, 2012Publication date: March 6, 2014Applicant: Luossavaara-Kiirunavaara ABInventors: Ola Eriksson, Daniel Marjavaara -
Publication number: 20130220076Abstract: This invention concerns a method for the heating of a medium in a compartment 1 in which pellets 2 are arranged to be oxidised and sintered with the aid of the hot medium. The method comprises the introduction of a first medium 3 into the compartment 1 through an inlet 4 and the heating of the first medium 3 when it is present in the inlet 4. The heating takes place through the use of a combustion arrangement 5, or a part of such an arrangement, that is arranged in the inlet 4 and that comprises fuel. The heating, the use of the combustion arrangement 5, comprises in turn the ignition of the fuel, combustion of the fuel whereby combustion heat is developed, and the transfer of the combustion heat to the first medium 3 that is present at the combustion arrangement 5 in the inlet 4.Type: ApplicationFiled: October 26, 2011Publication date: August 29, 2013Applicant: LUOSSAVAARA-KIIRUNAVAARA ABInventors: Christian Fredriksson, Stefan Savonen
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Publication number: 20130220075Abstract: This invention concerns a method for the oxidation and sintering of pellets 1 arranged in a compartment 2 in which the oxidation and sintering take place with the aid of a medium with a defined temperature, which medium heats the pellets 1. The method comprises the introduction of a first medium 3 into the compartment through an inlet 4 connected to the compartment 2 and the heating of the medium in the inlet through the use of a combustion arrangement 5, or a part of a combustion arrangement, arranged in the inlet 4 and comprising fuel where the use of the combustion arrangement 5 comprises the ignition of the fuel, the combustion of the fuel whereby combustion heat is developed, and the transfer of combustion heat to the first medium 3 that is present at the combustion arrangement 5.Type: ApplicationFiled: October 26, 2011Publication date: August 29, 2013Applicant: LUOSSAVAARA-KIIRUNAVAARA ABInventors: Christian Fredriksson, Stefan Savonen
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Publication number: 20110247457Abstract: The present invention relates to a process for the direct reduction of iron ore performed by means of a plant comprising a gravitational furnace (2) having at least one iron ore reduction zone (8) in the upper part thereof, and at least one carbon deposition zone (9) and one reduced metal product cooling zone (10) in the lower part thereof, and means for feeding a reducing gas mixture into the reactor in correspondence to the with the reduction zone, means for recycle exhaust or reactor off gas from the reactor to syngas and mixing the recycled gas with natural gas to form a reducing gas mixture.Type: ApplicationFiled: September 22, 2009Publication date: October 13, 2011Applicant: LUOSSAVAARA-KIIRUNAVAARA ABInventors: Klaus Knop, Sten Ångström
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Patent number: 7442229Abstract: The present invention relates to a method to improve the iron production rate in a blast furnace being charged by iron containing agglomerates. The method includes contacting the chargeable iron containing material with a slag modifying effective amount of a dispersion of a particulate material, wherein the contacting occurs prior to the charging of the agglomerate to blast furnace process.Type: GrantFiled: May 12, 2003Date of Patent: October 28, 2008Assignee: Luossavaara-Kiirunavaara ABInventors: Jerker Sterneland, Lawrence Hooey
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Patent number: 7347104Abstract: A method for the analysis of the strength of a test specimen of reducible material that contains iron during the use of an arrangement comprises: a) arranging a test specimen between adjacent contact surfaces of first and second devices of the arrangement; b) continuously reducing the distance between the contact surfaces; c) compressing the test specimen between the contact surfaces while a measurement value that comprises at least the force that is applied to the specimen is collected; d) storing the measured value in a memory; e) increasing the distance between the contact surfaces; and f) removing the compressed test specimen. An arrangement for carrying out the method is also provided.Type: GrantFiled: January 3, 2006Date of Patent: March 25, 2008Assignee: Luossavaara-Kiirunavaara ABInventors: Anders Apelqvist, Kjell-Ove Mickelsson, Seija Forsmo, Urban Holmdahl
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Patent number: 7347105Abstract: A method for the analysis of the properties of a test specimen comprises: arranging a test specimen between contact surfaces; continuously reducing the distance between the contact surfaces; measuring the diameter of the test specimen when the test specimen makes contact with the contact surfaces; further displacing the contact surfaces in a direction towards each other during the compression of the test specimen until the test specimen disintegrates; storing and continuously recording the force that is applied to the test specimen and the time; recording the maximum forces at all the points of disintegration of the test specimen; increasing the distance between the contact surfaces; and removing the test specimen.Type: GrantFiled: January 3, 2006Date of Patent: March 25, 2008Assignee: Luossavaara-Kiirunavaara ABInventors: Anders Apelqvist, Kjell-Ove Mickelsson, Seija Forsmo, Urban Holmdahl
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Publication number: 20060159614Abstract: A method for the analysis of the properties of a test specimen (A) of reducible material that contains iron of the type raw pellet or pellet for the optimisation of the pelletization process and the subsequent extraction of iron by the use of an arrangement that demonstrates a first device and a second device that can be displaced relative to each other, each of which demonstrates contact surfaces (8, 13) facing the other.Type: ApplicationFiled: January 3, 2006Publication date: July 20, 2006Applicant: LUOSSAVAARA-KIIRUNAVAARA ABInventors: Anders Apelqvist, Kjell-Ove Mickelsson, Seija Forsmo, Urban Holmdahl
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Publication number: 20060156826Abstract: A method for the analysis of the strength of a test specimen (A) of reducible material that contains iron during the use of an arrangement that demonstrates a first device and a second device that can be displaced relative to each other, each of which demonstrates contact surfaces (8, 13) facing the other. The method comprises the steps: a) a test specimen is arranged between the contact surfaces (8, 13); b) the distance between the contact surfaces (8, 13) is continuously reduced; c) the test specimen (A) is compressed between the contact surfaces (8, 13) while a measurement value that comprises at least the force that is applied to the specimen (a) is collected; d) the measured value is stored in a memory; e) the distance between the contact surfaces is increased; and f) the compressed test specimen is removed. The invention further comprises an arrangement for carrying out the method.Type: ApplicationFiled: January 3, 2006Publication date: July 20, 2006Applicant: LUOSSAVAARA-KIIRUNAVAARA ABInventors: Anders Apelqvist, Kjell-Ove Mickelsson, Seija Forsmo, Urban Holmdahl
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Patent number: 6332912Abstract: The invention relates to a method for reducing the formation of clods and the clustering tendency of reducible iron-containing agglomerated material, particularly so-called pellets, whereby the reducible iron-containing agglomerated material, following a desulfurization process that takes place after a sintering process during the manufacture of the pellets, is given an outer layer of clustering-reducing material in the form of a liquid suspension of particulate material. According to the invention, a more even distribution of the coating on the surface of the agglomerate is achieved in that the application of the liquid suspension takes place during tumbling in a drum that is designed so that the agglomerate together with the liquid suspension can essentially pass freely through it.Type: GrantFiled: November 16, 1999Date of Patent: December 25, 2001Assignee: Luossavaara-Kiirunavaara AB (LKAB)Inventor: Roger Klemo
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Patent number: 5909999Abstract: A method for maximizing the loading capacity of a wagon or wagon train when loading with pourable material from a silo. The method utilizes a computer which determines the type of wagon to be loaded on the basis of values obtained with sensors.Type: GrantFiled: November 17, 1997Date of Patent: June 8, 1999Assignee: Luossavaara-Kiirunavaara AB (LKAB)Inventor: Hilding Manstrom
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Patent number: 5823118Abstract: The invention relates to a bottom discharge arrangement intended for mounting on goods container of a railway truck. The arrangement includes at least one pair of flaps which is pivotally mounted on the goods container at their mutually remote edges, so as to be able to swing between an open and a closed position in a plane perpendicular to the edges. The arrangement includes a two-arm lever which is common to the link systems and which functions to maneuver the flaps simultaneously. The lever arm is pivotally mounted centrally at a point between the pivot axes of the flaps and is pivotally connected at one end to a first link pivotally mounted on one flap and at the other end is pivotally connected to a second link pivotally mounted on the other flap. When the flaps are closed, the pivot points between the parts of the link system lie in an essentially forceless state of equilibrium in a common plane which is locked in this state of equilibrium by an operating device coacting with the link system.Type: GrantFiled: June 26, 1997Date of Patent: October 20, 1998Assignee: Luossavaara-Kiirunavaara ABInventor: Hilding M.ang.nstrom
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Patent number: 5590793Abstract: The invention relates to a roll screen having variable screening apertures having axle-fitted rolls which are spaced at adjustable distances apart and a device for adjusting this spacing. The roll spacing adjusting device functions to act on all rolls simultaneously, so that the spacing change will be the same for all rolls. The device includes two parallel running tracks (10, 11) and the distance between these tracks can be varied. A change in the distance between the running tracks causes the roll axle housings (6) to rotate and move the axles (2). This roll screen also includes a device for adjusting the individual distance between two consecutive rolls without affecting the distances between the remaining rolls. This device includes a spacer (32) which is inserted between the housings of the two rolls in which the roll axles are journalled. The roll screen is also provided with a separate elastic sealing element between the roll axle and the roll drive arrangement.Type: GrantFiled: January 31, 1996Date of Patent: January 7, 1997Assignee: Luossavaara-Kiirunavaara ABInventor: Jonny Johansson