Patents Assigned to OUTOTEC (FINLAND) OY
  • Patent number: 10549284
    Abstract: Provided is a stress distribution element for a mill shell joint, comprising an elongated body having a proximal end and a distal end. The elongated body varies in one dimension from the proximal end to the distal end to distribute stress forces from the proximal end to the distal end. The invention also provides a stress distribution system, a stress distribution assembly, a mill shell section, a mill shell and a method of distributing stress incorporating the stress distribution element.
    Type: Grant
    Filed: July 8, 2014
    Date of Patent: February 4, 2020
    Assignee: OUTOTEC (FINLAND) OY
    Inventors: Nicholas John Green, Jeffrey Victor Belke
  • Patent number: 10532301
    Abstract: A horizontal pressure filter including a washing liquid recovery channel for receiving unused washing liquid from the washing liquid inlet channel and conducting said unused washing liquid to a washing liquid recovery outlet. A flow controller arranged to selectively open and close a flow connection between the washing liquid inlet channel and the washing liquid recovery channel, and respectively, between a compressed gas inlet and the washing liquid inlet channel, such that a gas flow from the compressed gas inlet to the washing liquid recovery channel via the washing liquid inlet channel may be induced, so as to flush unused washing liquid remaining in the washing liquid inlet channel to the washing liquid recovery outlet.
    Type: Grant
    Filed: January 4, 2019
    Date of Patent: January 14, 2020
    Assignee: OUTOTEC (FINLAND) OY
    Inventors: Lloyd Holliday, Teppo Suutari
  • Publication number: 20200010924
    Abstract: A process for roasting of metal concentrate wherein concentrate particles are fed into a roaster where they are thermally treated at a temperature in the range of 500 and 1200° C. in a fluidized bed to form a calcine. At least parts of the calcine are withdrawn from the roaster together with a gas stream as a solid fraction. Concentrate particles with a diameter at least 50% smaller than the average diameter of the concentrate particles are separated as small particles and/or particles from the gas-solid-fraction are separated in at least one step as small calcine particles and/or particles are gained in another hydrometallurgical step as other particles. Defined particles are pelletized, whereby at least 80% of the pellets feature a diameter of at least 80% of the concentrate particles average diameter. The pellets are fed into the roaster.
    Type: Application
    Filed: June 2, 2017
    Publication date: January 9, 2020
    Applicant: OUTOTEC (FINLAND) OY
    Inventors: Jochen GÜNTNER, Alexandros CHARITOS, JÖRG HAMMERSCHMIDT
  • Patent number: 10507472
    Abstract: The flotation apparatus includes a flotation vessel and a cover for closing an upwards open opening of the flotation vessel, wherein the cover and the flotation vessel limits a vessel space for receiving fluid, and an agitating means having a rotatable axis extending through a first aperture in the cover. The rotatable shaft is rotatable supported at a bearing housing outside the vessel space. A connection arrangement surrounds the rotatable shaft between the bearing housing and the cover.
    Type: Grant
    Filed: December 15, 2016
    Date of Patent: December 17, 2019
    Assignee: OUTOTEC (FINLAND) OY
    Inventors: Aleksi Peltola, Rodrigo Grau
  • Patent number: 10501824
    Abstract: A process of treating complex sulfide concentrate includes the steps of roasting wet or slurried complex sulfide concentrate in a furnace at a temperature of at least 720° C. to obtain a calcine; smelting the calcine under inert or oxygen free atmosphere in a smelting furnace to obtain a matte, and optionally granulating the matte to obtain a granulated matte.
    Type: Grant
    Filed: November 10, 2015
    Date of Patent: December 10, 2019
    Assignee: OUTOTEC (FINLAND) OY
    Inventors: Maija-Leena Metsärinta, Satu Jyrkönen, Jussi Liipo
  • Patent number: 10451350
    Abstract: The invention relates to a method and to an arrangement for feeding fine-grained matter to a concentrate or matte burner (1) of a suspension smelting furnace (2). The arrangement comprising a fluidization arrangement (3) for feeding fluidized fine-grained matter into a dosing bin (4), and a conveyor means (6) for feeding fluidized fine-grained matter from the dosing bin (4) to the concentrate or matte burner (1) of the suspension smelting furnace (2), and a loss-in-weight controller (5) between the dosing bin (4) and the conveyor means (6). The arrangement comprises an impact cone (8) arranged below a filling valve (7) between the fluidization arrangement (3) and the dosing bin (4) for distributing fluidized fine-grained matter flowing from the fluidization arrangement (3) within the dosing bin (4).
    Type: Grant
    Filed: March 21, 2018
    Date of Patent: October 22, 2019
    Assignee: Outotec (Finland) Oy
    Inventors: Markku Lahtinen, Tapio Ahokainen, Peter Björklund
  • Patent number: 10435769
    Abstract: A method for refining sulfidic copper concentrate includes feeding sulfidic copper concentrate and oxygen-bearing reaction gas and slag forming material into a reaction shaft of a suspension smelting furnace, collecting slag and blister copper in a settler of the suspension smelting furnace to form a blister layer containing blister copper and a slag layer, and discharging slag and blister copper separately from the settler of the suspension smelting furnace, so that slag is fed into an electric furnace. The method further includes feeding a part of the sulfidic copper concentrate into the electric furnace.
    Type: Grant
    Filed: January 15, 2019
    Date of Patent: October 8, 2019
    Assignee: OUTOTEC (FINLAND) OY
    Inventor: Akusti Jaatinen
  • Patent number: 10434521
    Abstract: A process for recovery of gold from gold-containing raw materials includes obtaining gold-containing raw material having refractory gold-containing sulfidic minerals including a first type of refractory sulfidic mineral having high gold content and a second type of sulfidic mineral having low gold content; forming a mineral pulp including a first type of refractory sulfidic mineral particles having high gold content and second type of sulfidic mineral particles having low gold content by suspending ground gold-containing material in water and optionally further milling the material; conditioning the mineral pulp by addition of a surface modifying chemical to obtain a conditioned pulp; subjecting the conditioned pulp to a froth flotation process; recovering the non-floatable first type of refractory sulfidic mineral particles having high cold content as flotation tailings; pressure oxidizing (POX) the flotation tailings to obtain a discharge slurry comprising liberated gold; and recovering gold from the discha
    Type: Grant
    Filed: October 12, 2016
    Date of Patent: October 8, 2019
    Assignee: OUTOTEC (FINLAND) OY
    Inventors: Jari Moilanen, Jaakko Leppinen
  • Patent number: 10428404
    Abstract: The present invention provides a method of converting copper containing material to blister copper comprising: (a) providing copper containing material comprising copper sulfides and iron sulfides, whereby the copper containing material comprises at least 35 wt % copper of the total weight of the copper containing material; (b) reacting the copper containing material in a furnace with an oxygen containing gas, in the absence of flux, to effect oxidation of iron sulfide and copper sulfide, and controlling injection of the oxygen containing gas and the temperature so that the resulting converter slag is in a molten phase to obtain blister copper and converter slag.
    Type: Grant
    Filed: May 12, 2015
    Date of Patent: October 1, 2019
    Assignee: OUTOTEC (FINLAND) OY
    Inventors: Markku Lahtinen, Jouni Pihlasalo, Mikael Jåfs
  • Patent number: 10422020
    Abstract: Provided is a method for melting copper scrap and/or refining blister copper, comprising the steps of: (a) charging of copper scrap into an empty anode furnace and melting the copper scrap; (b) charging molten blister copper into the anode furnace; (c) optionally charging more copper scrap into the anode furnace and melting the copper scrap; (d) optionally repeating steps (b) and/or (c) one or more times until the anode furnace is full and a desired amount of copper scrap has been charged and melted until a final copper batch is obtained; and (e) refining the final copper batch to obtain anode copper.
    Type: Grant
    Filed: April 21, 2016
    Date of Patent: September 24, 2019
    Assignee: OUTOTEC (FINLAND) OY
    Inventors: Harri Talvensaari, Akusti Jaatinen
  • Patent number: 10414597
    Abstract: Provided is a pallet car for the transport of bulk material for a thermal treatment thereof. The pallet car comprises a frame with at least two opposed cross-beams on which grate bars rest and two end pieces each connecting the cross-beams with each other, which each include at least two rollers and at least one side wall. In the pallet car, the grate bars and/or the side walls and/or the insulating plates are made of a ceramic fiber composite, wherein the fibers are metallic and high-temperature resistant.
    Type: Grant
    Filed: December 12, 2016
    Date of Patent: September 17, 2019
    Assignee: OUTOTEC (FINLAND) OY
    Inventors: Timo Rodenheber, Roger Becker, Pierre Manthey, Astrid Asquino, Till Weber, Michael Ströder, Isabella Vandermaelen
  • Patent number: 10406532
    Abstract: An arrangement for controlling a comminution process having a grinding circuit, includes an imaging system measuring 3D reconstruction measurement data for three-dimensional reconstruction of incoming ore; a particle size analysis equipment measuring particle size data for calculation of the particle size characteristic value of outgoing ore; an ore characteristics data calculation block receiving a particle size distribution profile of incoming ore and a particle size characteristic value of the outgoing ore, the particle size distribution profile being calculated and/or reconstructed from the 3D reconstruction measurement data for three-dimensional reconstruction, and the particle size characteristic value being calculated based on the measured particle size data, the ore characteristics data calculation block calculating ore characteristics data based on the particle size distribution profile and the particle size characteristic value; and a control block controlling the grinding circuit based on the calcu
    Type: Grant
    Filed: November 30, 2016
    Date of Patent: September 10, 2019
    Assignee: OUTOTEC (FINLAND) OY
    Inventors: Jani Kaartinen, Ari Rantala, Antti Remes, Ville Suontaka, Jari Moilanen, Pertti Saviranta
  • Patent number: 10399009
    Abstract: A filling shoe including a circular slurry opening extending between a filter plate side and a filter chamber side. A flange surrounds the slurry opening, and has an annular groove surrounding it and being arranged for receiving a filter medium. An outer edge of the body has a bevel towards the filter plate side on at least a part of the filling shoe. An outer edge of the flange is also provided with a bevel. Particularly, the filling shoe is formed as a single uniform piece of elastomer. A pin hole is provided so as to extend through the flange a position corresponding to the annular groove. A filling shoe arrangement, a filter medium assembly and a method for providing a filter medium with a filling shoe are also disclosed.
    Type: Grant
    Filed: November 5, 2018
    Date of Patent: September 3, 2019
    Assignee: OUTOTEC (FINLAND) OY
    Inventor: Teppo Suutari
  • Patent number: 10401090
    Abstract: A method and an arrangement measures electrode paste in an electrode column of an electric arc furnace. The electrode column has a steel casing, is provided with a contact shoe ring, and is filled with electrode paste introduced from above and evolving from raw paste in the upper part of the steel casing to melted paste and to baked paste in the lower part of the electrode column. The level of the raw paste is determined with a laser beam transmitted by a first laser device. The level of the molten paste is determined with a laser beam transmitted by a second laser device. The data received from the laser devices is used for calculation of the distances of the levels of the raw paste and molten paste from the contact shoe ring.
    Type: Grant
    Filed: December 30, 2014
    Date of Patent: September 3, 2019
    Assignee: OUTOTEC (FINLAND) OY
    Inventor: Janne Ollila
  • Patent number: 10400344
    Abstract: Provided is an electrode assembly for electrolytic processing in an electrolysis cell comprising an electrode blade comprising a metallic hanger bar portion, a first lug for supporting the metallic hanger bar portion on a first power supply bar, an insulating piece connecting the metallic hanger bar portion to the first lug. The electrode assembly also comprises an electrical switch unit controlling electrical current supply between the first lug and the metallic hanger bar based on a control signal transmitted to a terminal of the electrical switch unit, a control unit configured to transmit the control signal to the terminal of the electrical switch unit, and a power storage unit configured to supply power to the control unit, the power storage unit being charged from the first lug and the hanger bar when the electrical switch unit switches off electrical current supply between the first lug and the metallic hanger bar.
    Type: Grant
    Filed: May 30, 2014
    Date of Patent: September 3, 2019
    Assignee: OUTOTEC (FINLAND) OY
    Inventors: Duncan Grant, Michael H. Barker, Henri K. Virtanen, Sönke Schmachtel, Ari Rantala, Lauri Nordlund
  • Patent number: 10400307
    Abstract: A method and to an arrangement for recovery of precious metal. The method includes calculating a first electrical property of a slurry downstream of a retention screen in a first flow direction A either (i) based on a first difference between the first supplied current and the first received voltage, or (ii) based on a first difference between the first supplied voltage and the first received current, calculating a second electrical property of the slurry upstream of the retention screen either (i) based on a second difference between the second supplied current and the second received voltage, or (ii) based on a second difference between the second supplied voltage and the second received current, and calculating the adsorption particle content of the slurry upstream of the retention screen based on a difference between the first and the second electrical property.
    Type: Grant
    Filed: November 6, 2018
    Date of Patent: September 3, 2019
    Assignee: OUTOTEC (FINLAND) OY
    Inventors: Marko Latva-Kokko, Jari Kourunen
  • Patent number: 10391426
    Abstract: A recess plate designed for use in a filter device for filtering a suspension includes a stationary head piece and a movable end piece, and a pack including copies of the recess plate, having a filter chamber inside the pack, adjoining the recess plate, having a first pipe for filling the suspension into the filter chamber, having a filter cloth for collecting a solid content out of the suspension, and having a second pipe for discharging a liquid fraction of the suspension out of the filter chamber as a filtrate, wherein the filter device may be closed before filtering by forcing the end piece in direction of the head piece, and opened after filtering by releasing the end piece, and moving the end piece away from the head piece for removing the filter cake from the filter cloth.
    Type: Grant
    Filed: June 16, 2017
    Date of Patent: August 27, 2019
    Assignee: OUTOTEC (FINLAND) OY
    Inventor: Bernd Böhnke
  • Publication number: 20190249273
    Abstract: The present disclosure relates to hydrometallurgical technologies wherein liquid-liquid extraction, also called solvent extraction, is used to separate and concentrate metal ions. Exemplary embodiments relate to solvent extraction of copper and a diluent useful in copper solvent extraction. A bio-based composition can fulfil physico-chemical properties that are desired for solvent extraction. Moreover, a composition is disclosed, which in addition to providing more environmental friendly alternative, can also improve the solvent extraction process of copper.
    Type: Application
    Filed: July 4, 2017
    Publication date: August 15, 2019
    Applicants: OUTOTEC (FINLAND) OY, NESTE CORPORATION
    Inventors: Erkki Paatero, Rami Saario, Jukka Kortelainen, Maija Rouhiainen, Virpi Rämö
  • Patent number: 10357783
    Abstract: A method for controlling gas circulation in a mineral flotation process in a system including one or more flotation cell unit(s) with an apparatus including a gas recirculation loop, a flushing system including an expulsion line for connecting pressure side of the gas recirculation loop to atmosphere and a suction line including a water lock, or means, other than a water lock, for restricting the gas flow and preventing back flow of unpurified gas to the atmosphere, for connecting suction side of the gas recirculation loop to the atmosphere.
    Type: Grant
    Filed: June 11, 2015
    Date of Patent: July 23, 2019
    Assignee: OUTOTEC (FINLAND) OY
    Inventors: Jukka Lakanen, Rodrigo Grau, Kaisa Miinalainen
  • Patent number: 10351930
    Abstract: The present invention according provides a method of recovering silver from silver containing halide solutions, comprising the steps of: (a) providing an ion exchange column comprising a weak anion exchange resin; (b) introducing the silver containing halide solution to the ion exchange column to absorb silver in the weak anion exchange resin; (c) washing the loaded ion exchange resin with a first washing solution to rinse off absorbed zinc and optionally at least part of copper; (d) washing the loaded ion exchange resin with a second washing solution to rinse off remaining copper; and (e) optionally washing the loaded ion exchange resin with a third washing solution to rinse off absorbed lead; and (f) eluting the loaded ion exchange resin with an eluent to remove silver from the resin and to obtain a silver containing solution.
    Type: Grant
    Filed: June 4, 2015
    Date of Patent: July 16, 2019
    Assignee: OUTOTEC (FINLAND) OY
    Inventors: Kari Valkama, Mika Haapalainen, Mikko Tyster, Sami Virolainen