公开(公告)号：US20240263270A1

公开(公告)日：2024-08-08

申请号：US18561091

申请日：2022-04-27

申请人： NORSK HYDRO ASA

发明人： Inge JOHANSEN ,  Shahid AKHTAR ,  Alf Inge ROMFO ,  Roy Arne CHRISTIANSEN ,  Jon NYGARD

IPC分类号： C22B21/06

CPC分类号： C22B21/066 ,  C22B21/068

摘要： A method and an equipment for the treatment of molten aluminium metal, in particular Na removal in a tapping/transport crucible (1) provided with a lid (6). The atmosphere above the molten metal is sub-pressurized to a sub pressure between 300-10 mbar and subsequently exposed to a stirring action generated by an electromagnetic coil (EMS) arranged towards one side of the tapping/transport crucible (1), whereby Na can be removed from the molten aluminium metal without any addition of active or passive agents.

公开(公告)号：US11453938B2

公开(公告)日：2022-09-27

申请号：US16731136

申请日：2019-12-31

申请人： NORSK HYDRO ASA

发明人： Alf Inge Romfo ,  Snorre Rist ,  Idar Kjetil Steen ,  Geir Øyen ,  Øystein Bauger ,  Oddvin Reiso ,  Tanja Pettersen

IPC分类号： C22F1/047 ,  C22C1/06 ,  C22C21/06

摘要： Method and means for suppressing discoloration during thermal treatment of a product of a magnesium containing aluminium alloy, the alloy contains in wt. % Mg: 0.45-12.0, with a preferred range of 0.45-6.0 wt %. The product, being either an extrusion billet, a sheet ingot, a cast product, or a forged product is heated to a temperature T where it is prone to surface discoloration and oxidation, wherein during the thermal treatment it is exposed to a suppressing atmosphere comprising 0.5-5.0% CO2 gas with a preference for 0.5-1.5% CO2 gas.

公开(公告)号：US11376654B2

公开(公告)日：2022-07-05

申请号：US17425017

申请日：2020-01-15

申请人： NORSK HYDRO ASA

发明人： Britt Elin Gihleengen

IPC分类号： B22D11/049 ,  B22D11/04 ,  B22D11/055 ,  B22D46/00 ,  B22D11/20 ,  B22D11/22 ,  B22D11/14

摘要： A method for casting longitudinal cast products including casting longitudinal cast products in a semi-continuous manner using a DC casting apparatus having a mold, wherein the mold has top and bottom openings and partially solidifies molten metal that enters into the mold via the top opening and outputs the cast product via the bottom opening, recording a thermal image of the cast product output via the bottom opening, determining at least three non-overlapping temperature ranges comprising a first, second and third, determining a peak temperature in the thermal image; comparing the peak temperature with the at least three temperature ranges; and performing operations depending on where the peak temperature falls within the at least three temperature ranges.

公开(公告)号：US20210310099A1

公开(公告)日：2021-10-07

申请号：US17268222

申请日：2019-05-14

申请人： NORSK HYDRO ASA

发明人： Roland SCHARF-BERGMANN

IPC分类号： C22B21/00 ,  C22B7/00 ,  C22B1/00

摘要： Method for producing thermally processed material (50), the method comprising providing material (35) to be thermally processed, providing carbon-containing scrap material (20) from an electrolysis cell (10) for the production of primary aluminium (15), introducing the material (35) to be thermally processed into a furnace (40), processing the carbon-containing scrap material (20) to produce a scrap fuel (55), and thermally processing the material (35) to be thermally processed in the furnace (40) using energy generated by burning the scrap fuel (55) such as to produce thermally processed material (50).

公开(公告)号：US11123792B2

公开(公告)日：2021-09-21

申请号：US16611648

申请日：2018-05-15

申请人： NORSK HYDRO ASA

发明人： Ulf Håkon Tundal ,  Idar Kjetil Steen ,  John Olav Fagerlie ,  Terje Haugen

IPC分类号： B22D11/119 ,  C22B21/00 ,  B22D43/00 ,  C22B9/02 ,  C22B21/06

摘要： Apparatus and method for filtering molten metal including a container with a removable lid to keep the container sealed during operation, the container having an inlet chamber having an inlet opening receiving metal from a metal supply launder and outlet chamber with outlet opening connected to a launder segment. The container having a partition wall between the inlet chamber and outlet chamber and a ceramic foam filter mounted in the outlet chamber. The inlet chamber and outlet chamber being provided within the container and split by the partition wall. The container being connected in parallel with the metal supply launder via stubs. The launder being provided with a dam or valve device downstream the outlet of the container and another dam or valve device between the said launder stubs. Inside the container there is further arranged a second outlet chamber with a filter.

公开(公告)号：US20200248327A1

公开(公告)日：2020-08-06

申请号：US15776218

申请日：2016-10-04

申请人： NORSK HYDRO ASA

发明人： Jostein MAGNESEN ,  Per Johnny TEIGEN ,  Jan Frode HØINES ,  Odd Erik JACOBSEN ,  Are DYRØY ,  Morten KARLSEN ,  Juraj CHMELAR

IPC分类号： C25C7/02 ,  C25C3/14 ,  C25C3/12

摘要： A method and means for application of anode covering material (ACM) in an electrolysis cell for aluminium production where the cell being of Hall-Héroult type with prebaked anodes. The cell contains a cathode pot with a rectangular footprint and a superstructure with a gas collecting hood that lays onto the top of the cathode pot. A floor construction at least substantially surrounds the cell at a level below the top of the cathode pot and ventilation openings provided with grates are arranged in the floor in the close vicinity to the cell. The superstructure's hood is provided with removable lids that are removed for giving access to the cell's anodes through openings. ACM is applied via a feed tube to cover the anodes and the deposit of ACM is supported by a shuttering.

公开(公告)号：US20200064171A1

公开(公告)日：2020-02-27

申请号：US16344116

申请日：2017-10-17

申请人： NORSK HYDRO ASA

发明人： Hans KUEPPERS ,  Elmar WEDERSHOVEN ,  Simen ØYSTESE

IPC分类号： G01F11/34 ,  B65G53/16 ,  C25C3/14 ,  B65D88/72

摘要： Apparatus for feeding doses of fluidisable materials comprising one upper Intel pipe (1′, 1″), one lower outlet pipe (2′, 2″) and a Pausing (6′,6″). and a fluidising element (5′,5″) for controlling outflow of materials through the outlet pipe (2′, 2″). The apparatus further comprising a control volume constituted by a chamber (3′,3″) between the Intel pipe (1′, 8″) and the outlet pipe (2′,2″) and a fluidising element (4′, 4″) for controlling inflow of materials Into the chamber (3′, 3″). A diverter (7′,7″) la arranged between the Inlet pipe (1′, 8″) and the outlet pipe {2′, 2″) defining said chamber (3′, 3″) between said Inlet pipe (1′,8″) diverter (7′,7″) the housing (6′, 6″) and the fluidising element (5′,5″). The Invention also relates to a method for feeding doses of fluidisable materials by the apparatus.

公开(公告)号：US09840761B2

公开(公告)日：2017-12-12

申请号：US14395586

申请日：2013-04-25

申请人： Norsk Hydro ASA

发明人： Ulf Tundal ,  Oddvin Reiso ,  Svein Roger Skjervold ,  Angela Dawne Kubiak

IPC分类号： C22F1/05 ,  C22C21/08 ,  C22F1/047 ,  C22F1/043 ,  C22C21/02

CPC分类号： C22F1/047 ,  C22C21/02 ,  C22C21/08 ,  C22F1/043 ,  C22F1/05

摘要： Extrudeable Al—Mg—Si aluminum alloy with improved strength, corrosion resistance, crush properties and temperature stability, in particular useful in or close to the front part of vehicles. The composition of the alloy is defined within the following coordinate points of an Mg—Si diagram: a1-a2-a3-a4, where in wt % a1=0.60 Mg, 0.65Si, a2=0.90Mg, 1.0Si, a3=1.05Mg, 0.75Si and a4=0.70Mg, 0.50Si and where the alloy has a non-recrystallized grain structure in the extruded profile containing in addition the following alloy components in wt %: Fe up to 0.30 Cu 0.1-0.4 Mn 0.4-1.0 Cr up to 0.25 Zr up to 0.25 and Ti 0.005-0.15 incidental impurities up to 0.1 each and including Zn up to 0.5 with balance Al.

公开(公告)号：US09732981B2

公开(公告)日：2017-08-15

申请号：US14088942

申请日：2013-11-25

申请人： NORSK HYDRO ASA ,  NTNU TECHNOLOGY TRANSFER AS

发明人： Erling Naess ,  Otto Kristian Sonju ,  Torbjorn Slungaard ,  Bjorn Petter Moxnes

IPC分类号： B01D50/00 ,  B01D59/50 ,  F24H8/00 ,  C25C3/22 ,  F27D17/00 ,  F28F1/02 ,  F28F1/30 ,  F28D21/00

CPC分类号： F24H8/00 ,  C25C3/22 ,  F27D17/00 ,  F28D21/0003 ,  F28F1/02 ,  F28F1/30 ,  Y02B30/102 ,  Y02P10/262 ,  Y02P10/265 ,  Y02P10/283

摘要： The present invention relates to a method and equipment for recovering heat from exhaust gas removed from an industrial process, such as an electrolysis process for the production of aluminum. Heat is recovered by means of an extraction/suction system, where the exhaust gas contains dust and/or particles. The heat is recovered as the exhaust gas being brought into contact with heat-recovery elements. Flow conditions and the design of the heat recovery elements are such that the deposits of the dust and/or particles on the surfaces stated are kept at a stable, limited level. In preferred embodiments, the heat-recovery elements have a circular or an extended, elliptical cross-section and may be equipped with fins or ribs.

公开(公告)号：US09217204B2

公开(公告)日：2015-12-22

申请号：US10524855

申请日：2003-08-15

申请人： Ole-Jacob Siljan ,  Stein Julsrud

发明人： Ole-Jacob Siljan ,  Stein Julsrud

IPC分类号： C25B15/02 ,  C25B9/00 ,  C25C1/00 ,  C25C3/06 ,  C25C3/08 ,  C25C3/20 ,  C25C7/02 ,  C25C7/06

CPC分类号： C25C3/08 ,  C25C3/06

摘要： The present invention relates to methods for operating and controlling the temperature of inert electrodes during production of molten aluminum by electrolysis of an aluminous ore, preferably alumina, dissolved in molten salts, preferably a fluoride based electrolyte, in an electrolysis cell with vertical or essentially vertical electrode configuration.The invention describes methods of designing and operating inert electrodes in a vertical and/or inclined position for production of aluminum metal, where said electrodes have an operating temperature that may deviate from the electrolyte temperature, thereby controlling the dissolution of electrode materials and preventing solid deposit formation on the electrodes. The present invention is also applicable to aluminum production cells utilizing inert electrodes in a horizontal configuration, and traditional Hall-Hèroult cells retrofitted with inert anodes.

摘要翻译： 本发明涉及通过在垂直或基本垂直的电解池中电解溶解在熔融盐（优选氟化物基电解质）中的铝矿，优选氧化铝，来操作和控制生产熔融铝期间惰性电极的温度的方法 电极配置。 本发明描述了在用于生产铝金属的垂直和/或倾斜位置中设计和操作惰性电极的方法，其中所述电极具有可能偏离电解质温度的操作温度，从而控制电极材料的溶解并防止固体沉积 在电极上形成。 本发明也适用于利用水平构型的惰性电极的铝生产电池，以及用惰性阳极改装的传统霍尔赫氏电池。