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21.发明授权公开(公告)号：US07212562B2
公开(公告)日：2007-05-01
申请号：US11215996
申请日：2005-09-01
Applicant: Thomas Lai Wai Ma
Inventor： Thomas Lai Wai Ma
IPC: H05B7/144
CPC classification number: F27D11/10 , F27B3/28 , F27D19/00 , F27D21/00 , F27D2019/0037 , H05B7/144 , H05B7/148 , Y02P10/256 , Y02P10/259
Abstract: A method and system for stabilizing energy consumption in multiple loads, or in single multi-phase loads. A central controller monitors variable reactances in the loads and identifies situations of power and/or current fluctuation and/or unbalance. The central controller determines appropriate corrective action by the other loads/phases to compensate for the power and/or current change or unbalance due to the problematic load, and it issues control signals instructing electrode position controllers associated with the other loads to adjust accordingly. The method and system may by applied to electric arc furnace installations. The electrode position controllers may be used in conjunction with variable reactance control systems to take corrective action to address power and/or current changes or unbalances. The variable reactors respond orders of magnitude faster than the electrode positioning system.
Abstract translation: 一种用于稳定多个负载或单个多相负载能耗的方法和系统。 中央控制器监视负载中的可变电抗，并识别功率和/或电流波动和/或不平衡的情况。 中央控制器通过其他负载/相位确定适当的校正动作，以补偿由于有问题的负载引起的功率和/或电流变化或不平衡，并且发出指示与其他负载相关联的电极位置控制器的控制信号相应地进行调整。 该方法和系统可以应用于电弧炉安装。 电极位置控制器可以与可变电抗控制系统一起使用以采取纠正措施来解决功率和/或电流变化或不平衡。 可变电抗器响应数量级比电极定位系统快。
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公开(公告)号：US06875251B2
公开(公告)日：2005-04-05
申请号：US10146208
申请日：2002-05-15
Applicant: Iakov Gordon , Frank M. Wheeler
Inventor： Iakov Gordon , Frank M. Wheeler
CPC classification number: C21C5/54 , C21C5/5294 , C21C5/567 , Y02P10/216
Abstract: A process for the manufacture of steel in which a charge material comprising direct reduced iron, and optionally containing steel scrap, is continuously charged into a stationary electric arc furnace. Inside the furnace, a bath of molten steel and a continuous slag layer are maintained, the steel bath preferably having a volume of approximately 7 to 13 tap volumes. Heat for melting the charge material is preferably provided by open arcs between the electrodes and the metal bath, with the slag layer preferably being superheated to about 40 to 150° C. above the bath temperature. In order to prevent excessive superheating, the slag preferably has a melting point substantially the same as, or greater than, the bath temperature, with the slag melting temperature being adjustable by varying the amount of MgO in the slag. The slag preferably has low basicity to reduce the rate of refractory erosion. The steelmaking process is preferably carried out in a steel manufacturing plant in which a direct reduction furnace is closely coupled to the electric arc furnace. Preferably, the direct reduction furnace is “stacked” above the electric arc furnace so that the direct reduced iron can be fed to the electric arc furnace by gravity through inclined conduits.
Abstract translation: 一种用于制造钢的方法，其中将包含直接还原铁和任选地含有废钢的充电材料连续地装入固定式电弧炉中。 在炉内，保持钢水浴和连续炉渣层，钢浴的体积最好约为7至13抽头体积。 用于熔化充电材料的热量优选由电极和金属浴之间的开放弧形提供，炉渣层优选过热至高于浴温度约40至150℃。 为了防止过度的过热，渣优选具有与浴温基本相同或更大的熔点，炉渣熔融温度可通过改变炉渣中MgO的量来调节。 渣优选具有低的碱度以降低难熔侵蚀的速率。 炼钢工艺优选在其中直接还原炉紧密耦合到电弧炉的钢铁制造厂中进行。 优选地，直接还原炉在电弧炉上方“堆叠”，使得直接还原铁可以通过倾斜的管道通过重力输送到电弧炉。
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公开(公告)号：US12145636B2
公开(公告)日：2024-11-19
申请号：US17917480
申请日：2021-04-09
Applicant: HATCH LTD.
Inventor： Patrick Henry McGinn , Mark James Mitchell , Matthew Douglas Brown , Matthew Gorczyca , Michael Morgan Campbell
IPC: B61K9/08 , B60M3/00 , B61D15/12 , B61L27/53 , G01R31/00 , G01R31/11 , G01R31/52 , G01R33/00 , G01R33/028 , G01R33/04 , G01R33/07 , G01R33/09
Abstract: A method, device, and system for detecting a current leak in a traction power rail. Magnetic or electrical properties of the rail are measured. The measurements are performed using a rail instrument that senses the properties around the rail at various times while the instrument is being moved down the rail, such as using a cart or train. The rail instrument may be a flux concentrator or open Rogowski coil. The locations of the rail, about which the readings are taken by the rail instrument, may be determined and correlated with the measurements themselves. The method may comprise measuring the magnetic field of the rail along a length of the rail, and identifying a leak based on differences between the magnetic field measurements. The system may comprise a cart comprising the rail instrument and a location instrument.
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24.发明申请公开(公告)号：US20240376566A1
公开(公告)日：2024-11-14
申请号：US18554341
申请日：2022-04-12
Applicant: HATCH LTD.
Inventor： Brady Haneman , Cinziana Sist , Mark Eichhorn
Abstract: A process for helping improve hydrometallurgical precious metal recovery from preg-robbing ores or concentrates, such as double refractory ores or concentrates or carbonaceous ores. The process comprises treating the ore or concentrate in the presence of oxygen at a temperature and pressure sufficient to oxidize at least a portion of the organic carbon material in the ore or concentrate. A vessel is used to treat the ore or concentrate to oxidize the organic carbon material. The vessel may be a pipe. The vessel maintains the ore at an elevated temperature and pressure in the presence of oxygen. The vessel may have an inlet for receiving a pre-treated slurry of ore or concentrate, a mechanism for oxygen addition, a mechanism for degassing the pipe reactor, and an outlet for providing the treated slurry to further processing. The vessel may be used in series after an autoclave. The pipe reactor may also include a pre-heating step and a cooling step.
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公开(公告)号：US11873539B2
公开(公告)日：2024-01-16
申请号：US17977459
申请日：2022-10-31
Applicant: HATCH LTD.
Inventor： Robert John Fraser , Jacqueline Fossenier , Maryam Neisani , Louiza Kahina Harkouk , Amir Mohammad Nazari , Fangyu Liu
CPC classification number: C22B23/06 , C22B23/043 , C22B23/0461
Abstract: Processes and methods for refining ferronickel alloy, and producing nickel sulfate or other nickel product, are provided, where the ferronickel alloy is treated with an oxidizing leach. The oxidizing leach may be, for example, a pressure oxidation (POX) leach or a leach with peroxide or copper (II) ions. The treatment may be in the presence of added copper, such as by providing a copper sulfate solution. Producing nickel sulfate may comprise removing copper and iron after the leach, removing impurities, and either crystallizing the nickel sulfate or precipitating/winning another nickel product.
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Patent Agency Ranking
公开(公告)号：US20220009793A1
公开(公告)日：2022-01-13
申请号：US17222264
申请日：2021-04-05
Applicant: Hatch Ltd. , Northvolt AB
Inventor： Robert John FRASER , Evangelos STAMATIOU , Mark Joseph MACHADO , Henry Christian Immo von SCHROETER , Mahmood ALEMRAJABI
Abstract: A process for generating a metal sulfate that involves crystallizing a metal sulfate from an aqueous solution to form a crystallized metal sulfate in a mother liquor with uncrystallized metal sulfate remaining in the mother liquor; separating the crystallized metal sulfate from the mother liquor; basifying a portion of the mother liquor to convert the uncrystallized metal sulfate to a basic metal salt; and using the basic metal salt upstream of crystallizing the metal sulfate. So crystallized, the generated metal sulfate may be battery-grade or electroplating-grade.
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公开(公告)号：US11146067B2
公开(公告)日：2021-10-12
申请号：US16176528
申请日：2018-10-31
Applicant: Hatch Ltd.
Inventor： Michael Morgan Campbell , Yan Elksnis , Dong Shen
Abstract: A configuration of switches added to a line control circuit allows for switching back and forth between a configuration featuring a series-connected thyristor switch and reactor and a configuration featuring a parallel-connected thyristor switch and reactor. Connecting the reactor in series with the thyristor switch allows a controlled high-impedance circuit configuration that is particularly well adapted for cold furnace start-ups and furnace idling. In this manner, there is reduced need for such equipment as extra startup transformers, alternate low-voltage power supply configurations and temporary specialty electrical apparatus for cold furnace start-ups.
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28.发明授权公开(公告)号：US10705196B2
公开(公告)日：2020-07-07
申请号：US15812462
申请日：2017-11-14
Applicant: HATCH LTD.
Inventor： Matthew H. Cramer , Afshin Sadri , Jennifer Erskine , David Chataway , Bert O. Wasmund , Terry Gerritsen
Abstract: A method for determining a length parameter of an electrode during operation of an electric arc furnace. An internal duct extends through the length of the electrode and is open at its lower end. A waveguide having a solid core is received in the internal duct and comprises a material having a low dielectric constant and high temperature resistance. The solid core of the waveguide includes at least one target. An electromagnetic radiation signal is emitted from a source and transmitted through the waveguide and the signal is diffracted and/or reflected from at least one target to produce at least one return signal which is transmitted back through the waveguide. A time or frequency difference between the emitted signal and the return signal is measured and the length parameter is calculated based on this difference.
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公开(公告)号：US10527352B2
公开(公告)日：2020-01-07
申请号：US16058543
申请日：2018-08-08
Applicant: HATCH LTD.
Inventor： Dustin Alexander Vickress , Ian Archibald Cameron , David Henry Rudge , Andriy Ponomar , Volodymyr Ponomar , Maciej Urban Jastrzebski , John Andrew Ferguson Shaw
Abstract: An abrasion-resistant material for the working face of a metallurgical furnace cooling element such as a stave cooler or a tuyere cooler having a body comprised of a first metal. The abrasion-resistant material comprises a macro-composite material including abrasion-resistant particles which are arranged in a substantially repeating, engineered configuration infiltrated with a matrix of a second metal, the particles having a hardness greater than that of the second metal. A cooling element for a metallurgical furnace has a body comprised of the first metal, the body having a facing layer comprising the abrasion-resistant material. A method comprises: positioning the engineered configuration of abrasion-resistant particles in a mold cavity, the engineered configuration located in an area of the mold cavity to define the facing layer; and introducing molten metal into the cavity, the molten metal comprising the first metal of the cooling element body.
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公开(公告)号：US10408767B1
公开(公告)日：2019-09-10
申请号：US16007411
申请日：2018-06-13
Applicant: HATCH LTD.
Inventor： Owen Pearcey
Abstract: A system and method for identifying imperfections in a reflective surface. The reflective surface may be a metal coating on a sheet such as in a galvanization process. The system comprises a laser detector. The laser detector may be part of a triangulation unit. The laser detector takes readings corresponding to the angles of travel of diffuse light of a laser off of different portions of the reflective surface. Imperfections in the surface are identified based on variance in the readings. The method comprises detecting diffuse light of a laser beam off of different portions of the reflective surface, and identifying imperfections based on variances in the angles of travel of the diffuse light detected.
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