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公开(公告)号：US20240114604A1
公开(公告)日：2024-04-04
申请号：US18373672
申请日：2023-09-27
摘要： A power supply is provided for an electric arc furnace in which heat is generated by passage of current through one or more electrodes that causes an electric arc between the one or more electrodes and a metal in the electric arc furnace. The power supply is coupleable to and between the electric arc furnace and a utility configured to provide three-phase alternating current (AC) power. The power supply includes power circuitry with a cycloconverter (CCV) for each electrode of the one or more electrodes. The CCV is configured to receive three-phase power voltage and produce a single-phase voltage with reduced frequency that is delivered to the electrode to cause the electrode to create the electric arc that produces the heat to melt the metal. Control circuitry is operably coupled to the CCV, and configured to control a frequency of the single-phase voltage.
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公开(公告)号：US11921036B2
公开(公告)日：2024-03-05
申请号：US17271732
申请日：2019-09-09
发明人： Vittorio Scipolo , Avishekh Pal
CPC分类号： G01N21/3103 , F27B3/28 , F27D21/00 , G01N33/004 , G01P5/22 , G01N2201/0612
摘要： An optically based combustion off-gas stream velocity sensor assembly is provided for detecting in real-time off-gas flow velocity and/or volume as it moves through a flue duct. The sensor assembly includes two paired coherent light emitters and optic sensors, positioned in a spaced orientation in the flow path direction. The light emitter/optic sensor pairs operate to emit and detect across the off-gas stream coherent light beam energy having a wavelength component corresponding to an absorption profile of an off-gas species component. The detection of non-absorbed portions of the emitted beam is used to identify and detect the movement of a flow species signature at different locations along the flue duct.
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3.发明授权公开(公告)号：US11668526B2
公开(公告)日：2023-06-06
申请号：US16649966
申请日：2018-08-28
发明人： Qiming Huang , Cunzhen Tan , Weizhi Shi , Yuchuan Zhang , Zhan Gao , Lei Al , Chunting Liu , Wei Lin , Chao Liu
CPC分类号： F27B3/085 , F27D13/002 , F27B3/205 , F27B3/28 , F27D17/003 , F27D99/0033
摘要： The present invention belongs to the technical field of metallurgy, and discloses a horizontal continuous feeding preheating device and an enhanced preheating method therefor. The scheme comprises that two dust removal ports are arranged at the front and rear parts of a horizontal continuous feeding preheating duct, and the horizontal continuous feeding preheating duct is divided into an enhanced preheating area and a flue gas preheating area by the two dust removal ports arranged at the front and rear parts of the horizontal continuous feeding preheating duct; burners are installed in the enhanced preheating area, and the two dust removal ports are connected with a flue gas adjusting distributor respectively by a flue gas pipeline the steel scrap preheating efficiency of the burners and electric arc furnace flue gas is increased by controlling the flow rate and temperature of mixed flue gas.
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4.发明申请公开(公告)号：US20180195803A1
公开(公告)日：2018-07-12
申请号：US15107279
申请日：2014-12-30
申请人： OUTOTEC (FINLAND) OY
发明人： Janne OLLILA
CPC分类号： F27D19/00 , F27B3/28 , F27D11/08 , F27D21/00 , F27D21/02 , F27D2019/0071 , H05B7/09 , H05B7/109
摘要： Provided are a method and an arrangement for measurement of electrode paste in an electrode column of an electric arc furnace. The electrode column comprises a steel casing surrounding the electrode paste and said electrode column is provided with a contact shoe ring to conduct electric current to the electrode. The electrode column is filled with electrode paste. The electrode paste evolves through different phases, from raw paste in the upper part of the steel casing to melted paste and further to baked paste in the lower part of the electrode column. The level of the raw paste is determined with a first laser device and the level of the molten paste is determined with 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.
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公开(公告)号：US10018509B2
公开(公告)日：2018-07-10
申请号：US14783233
申请日：2014-04-11
申请人： OUTOTEC (FINLAND) OY
IPC分类号： F16M13/02 , G01K1/12 , G01K1/14 , G01J5/00 , C21C5/46 , F27B3/28 , F27D21/00 , G01K13/00 , C21C5/52 , F27D19/00
CPC分类号： G01J5/004 , C21C5/4673 , C21C2005/5288 , F27B3/28 , F27D21/0014 , F27D2019/0003 , G01K13/00 , Y02P10/216
摘要： A temperature measuring apparatus for a top submerged lancing installation, for use in measuring the temperature of a molten bath that includes a slag phase, during a pyro-metallurgical operation conducted in a reactor of the installation, includes a top submerged injecting top submerged injecting lance having at least an outer pipe and an inner pipe. A bore is defined by the inner pipe and an annular passage is defined in part by an inner surface of the outer pipe. The apparatus further includes a pyrometer device of which at least a sensor head part is mounted in relation to the top submerged injecting lance and operable both to receive infrared energy passing longitudinally within the lance from an outlet end of the lance. The sensor head part also is operable to focus the received infrared energy to enable generation of an output signal or display indicative of the temperature of a molten bath in which an outlet end portion of the lance is submerged and from which the infrared energy is received.
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公开(公告)号：US20170223783A1
公开(公告)日：2017-08-03
申请号：US15501035
申请日：2015-08-26
发明人： Othman N. ALZEGHAIBI
CPC分类号： H05B7/148 , C21C5/52 , C21C5/527 , F27B3/28 , F27D19/00 , F27D21/0028 , F27D21/0035 , F27D2019/0003 , F27D2019/0018 , F27D2019/0037 , F27D2019/0075 , G05B15/02 , G05D23/1917 , H05B7/20
摘要： Methods and systems for managing a heating process are disclosed. An example method can comprise removing a first portion of a material from a vessel and measuring a first parameter of a second portion of the material in the vessel. The second portion of the material can remain in the vessel after the removal of the first portion. The method can comprise, determining a volume of the second portion of the material based on the first parameter, updating a second parameter based on the volume, and performing a process based on the updated second parameter.
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公开(公告)号：US20170107646A1
公开(公告)日：2017-04-20
申请号：US15392257
申请日：2016-12-28
发明人： Hans L. Melgaard
CPC分类号： D01F9/322 , D01F9/32 , D01F9/324 , D01F9/328 , D02J13/001 , F27B3/04 , F27B3/045 , F27B3/20 , F27B3/22 , F27B3/28 , F27B17/00 , F27B17/0025 , F27B17/0075 , F27D7/02 , F27D11/00 , F27D17/004 , F27D19/00 , F27D99/0001 , F27D2019/0006 , F27D2099/0065
摘要： An example oven for heating fibers includes a chamber having upper and lower portions and a supply structure between first and second ends of the chamber, wherein the supply structure is in communication with a first heating system and is configured to direct first heated gas from the first heating system into the upper portion of the chamber to heat fibers in the upper portion at a first temperature, and wherein the supply structure is in communication with a second heating system and is configured to direct second heated gas from the second heating system into the lower portion of the chamber to heat fibers in the lower portion at a second temperature different than the first temperature such that the upper and lower portions of the chamber maintain the different temperatures without a physical barrier between the upper and lower portion.
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公开(公告)号：US09618265B2
公开(公告)日：2017-04-11
申请号：US14526681
申请日：2014-10-29
申请人： Nupro Corporation
发明人： Frank L. Kemeny , David I. Walker
CPC分类号： F27B3/28 , C21C5/4673 , C21C2005/468 , C21C2005/5288 , F27B3/19 , F27D3/1509 , Y02P10/216
摘要： A method of tapping a steelmaking furnace comprised of determining a desired level of steel to be attained in a ladle, and calculating the weight of molten steel that will be present when the desired level is attained following a transfer of molten steel from the furnace to the ladle. The furnace is operated such that slag is formed on top of molten steel contained therein. The furnace is moved to a first position to cause transfer of molten steel to the ladle to begin. The transfer of molten steel from the furnace to the ladle is continued, and at the first occurrence of molten steel attaining the desired level in the ladle, molten steel attaining a maximum allowable weight in the ladle, or an excessive amount of slag being present upon the molten steel in the ladle, transfer of molten steel to the ladle is ceased.
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公开(公告)号：US20160258682A1
公开(公告)日：2016-09-08
申请号：US15024972
申请日：2014-09-18
申请人： MINTEK
CPC分类号： F27B3/28 , F27B3/085 , F27D17/004 , F27D21/00 , F27D2019/0037 , G01R19/0061 , H05B7/18 , H05B7/20
摘要： A method of detecting an open arc in a DC plasma arc furnace which is based on detecting a linear decrease in the log of the magnitude of the frequency spectrum of the voltage between the anode and cathode.
摘要翻译： 一种检测直流等离子体电弧炉中的开放电弧的方法，其基于检测阳极和阴极之间的电压的频谱幅度的对数的线性减小。
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公开(公告)号：US20160123669A1
公开(公告)日：2016-05-05
申请号：US14526681
申请日：2014-10-29
申请人： Nupro Corporation
发明人： Frank L. KEMENY , David I. WALKER
CPC分类号： F27B3/28 , C21C5/4673 , C21C2005/468 , C21C2005/5288 , F27B3/19 , F27D3/1509 , Y02P10/216
摘要： A method of tapping a steelmaking furnace comprised of determining a desired level of steel to be attained in a ladle, and calculating the weight of molten steel that will be present when the desired level is attained following a transfer of molten steel from the furnace to the ladle. The furnace is operated such that slag is formed on top of molten steel contained therein. The furnace is moved to a first position to cause transfer of molten steel to the ladle to begin. The transfer of molten steel from the furnace to the ladle is continued, and at the first occurrence of molten steel attaining the desired level in the ladle, molten steel attaining a maximum allowable weight in the ladle, or an excessive amount of slag being present upon the molten steel in the ladle, transfer of molten steel to the ladle is ceased.
摘要翻译： 一种钢炼炉的方法，包括确定在钢包中要获得的钢的期望水平，以及计算当钢水从炉转移到炉中时获得所需水平时将存在的钢水重量 钢包 操作炉子，使炉渣形成在其中容纳的钢水顶部。 炉子移动到第一位置以使钢水转移到钢包开始。 将钢水从炉中转移到钢包继续进行，钢水第一次发生时，钢水达到所需水平，钢水中钢水达到最大允许重量，或过量的炉渣存在于 钢包中的钢水停止，钢水转移到钢包中。
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