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1.发明申请公开(公告)号：US20250083232A1
公开(公告)日：2025-03-13
申请号：US18882638
申请日：2024-09-11
Applicant: SUNCOKE TECHNOLOGY AND DEVELOPMENT LLC
Inventor： John Francis QUANCI , John Michael RICHARDSON , Patrick James MULLARKEY , David James SCHWAKE , Andrew Michael BUTOR , Jonathan Hale PERKINS , Chun Wai CHOI
Abstract: Systems for continuous granulated metallic unit (GMU) production, and associated devices and methods are disclosed herein. In some embodiments, a continuous GMU production system includes a furnace unit, a desulfurization unit, a plurality of granulator units, and a cooling system. The furnace unit can receive input materials such as iron ore and output molten metal. The desulfurization unit can reduce a sulfur content of the molten metallics received from the furnace unit. Each of the plurality of granulator units can include a tundish that can control the flow of molten metallics and a reactor that can granulate the molten metallics to form GMUs. The cooling system can provide cooled water to the reactor. Continuous GMU production systems configured in accordance with embodiments of the present technology can produce GMUs under continuous operations cycles for, e.g., at least 6 hours.
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公开(公告)号：US20250043372A1
公开(公告)日：2025-02-06
申请号：US18926866
申请日：2024-10-25
Applicant: United States Steel Corporation
Inventor： Yun Li , David L. Runner , Jonathan D. Youngblood , Scott R. Story
Abstract: The present disclosure provides a method of making low carbon steel. The method includes tapping the liquid steel out of a primary steelmaking furnace. Deoxidizing the liquid steel. Transferring the deoxidized liquid steel to a ladle metallurgy furnace. Removing sulfur at the ladle metallurgy furnace. Adding fluxes and arcing the liquid steel to prevent sulfur reversion. Transferring the liquid steel from the ladle metallurgy furnace to an RH degasser for carbon removal. The removal of oxygen and sulfur prior to transferring the liquid steel to the RH degasser facilitates nitrogen removal and prevents carbon pick up during the step sulfur removal.
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公开(公告)号：US12168808B2
公开(公告)日：2024-12-17
申请号：US17897824
申请日：2022-08-29
Applicant: United States Steel Corporation
Inventor： Yun Li , David L. Runner , Jonathan D. Youngblood , Scott R. Story
Abstract: The present disclosure provides a method of making low carbon steel. The method includes tapping the liquid steel out of a primary steelmaking furnace. Deoxidizing the liquid steel. Transferring the deoxidized liquid steel to a ladle metallurgy furnace. Removing sulfur at the ladle metallurgy furnace. Adding fluxes and arcing the liquid steel to prevent sulfur reversion. Transferring the liquid steel from the ladle metallurgy furnace to an RH degasser for carbon removal. The removal of oxygen and sulfur prior to transferring the liquid steel to the RH degasser facilitates nitrogen removal and prevents carbon pick up during the step sulfur removal.
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公开(公告)号：US20240309475A1
公开(公告)日：2024-09-19
申请号：US18575895
申请日：2021-07-06
Applicant: METSO METALS OY
Inventor： Timo HAIMI , Olli PEKKALA
CPC classification number: C21B13/0006 , C21B13/008 , C21B13/12 , C21C7/064
Abstract: A method for processing iron ore to obtain steel by feeding the DRI into a smelting furnace so as to obtain an intermediate iron product, which is then subsequently introduced into a conversion unit for obtaining steel form the intermediate iron product. Moreover, carbon is introduced into the process. As a consequence, a suitable carbon content may be achieved for the intermediate iron product such that impurities of the intermediate iron product may be reduced along with carbon contents thereof in a steel conversion process without sacrificing iron contents of the intermediate iron product. Simultaneously, suitable fluxes are fed into the smelting furnace together with the DRI, such that high-quality slag suitable as raw material for further processing is obtained therefrom. An associated smelting furnace arrangement is also disclosed.
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公开(公告)号：US20240247330A1
公开(公告)日：2024-07-25
申请号：US18435044
申请日：2024-02-07
Applicant: S.A. Lhoist Recherche et Developpement
Inventor： Eric Perrin , Souliyann Chunlamani
IPC: C21C7/064
CPC classification number: C21C7/0645
Abstract: A slag conditioning agent for steel desulfurization is shown which is made by a process in which a dried slag material obtained from a secondary steelmaking process is mixed with quicklime particles. The quicklime particles react with moisture in the slag material to dry the slag material and produce a blend of slag material, hydrated lime and any unreacted quicklime. The blend is then sieved to separate out the hydrated lime. The retained dried fraction after sieving is then mixed with an Al2O3 mass fraction from which the slag conditioning agent can be collected. The slag conditioning agent has an equivalent mass ratio which is between 0.55 and 1.5.
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Patent Agency Ranking
6.发明公开公开(公告)号：US20240247328A1
公开(公告)日：2024-07-25
申请号：US18458173
申请日：2023-08-30
Applicant: University of Science and Technology Beijing , Beijing Kemi Rongcheng Energy Technology Co., Ltd.
Inventor： Kai DONG , Xin REN , Rong ZHU , Guangsheng WEI , Chao FENG , Rongfang SU , Shaoyan HU , Yun ZHOU , Chunyang WANG , Zhitao XUE , Linghui MENG
CPC classification number: C21C5/30 , C21C5/4606 , C21C5/466 , C21C7/0645 , C21C2005/4666
Abstract: A converter bottom blowing system comprises a first gas source connected in parallel with a lime powder silo, a lime powder blowing tank and a first injector, where a first cut-off valve is arranged between the lime powder blowing tank and the first injector; a second gas source connected in parallel with the biochar powder silo, the biochar powder blowing tank and the second injector, where a second cut-off valve is arranged between the biochar powder blowing tank and the second injector; a converter, where a plurality of bottom blowing lances are arrayed at a bottom of a converter, the bottom blowing lances are connected with the first injector and the second injector through a three-way valve, a third cut-off valve is arranged between the first injector and the three-way valve, and a fourth cut-off valve is arranged between the second injector and the three-way valve.
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公开(公告)号：US11932914B2
公开(公告)日：2024-03-19
申请号：US17309680
申请日：2019-12-17
Applicant: S.A. Lhoist Recherche et Developpement
Inventor： Eric Perrin , Souliyann Chunlamani
IPC: C21C7/064
CPC classification number: C21C7/0645
Abstract: A process for manufacturing a slag conditioning agent for steel desulfurization is shown in which a dried slag material Obtained from a secondary steelmaking process is mixed with quicklime particles. The quicklime particles react with moisture in the slag material to dry the slag material and produce a blend of slag material, hydrated lime and any unreacted quicklime. The blend is then sieved to separate out the hydrated lime. The retained dried fraction after sieving is then mixed with an Al2O3 mass fraction from which the slag conditioning agent can be collected. The slag conditioning agent has an equivalent mass ratio which is between 0.55 and 1.5.
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公开(公告)号：US20230313330A1
公开(公告)日：2023-10-05
申请号：US18022802
申请日：2021-08-23
Applicant: JFE STEEL CORPORATION
Inventor： Nobuhiko ODA , Masanori TANNO , Rei YAMADA
CPC classification number: C21C7/064 , C21C5/54 , C21C2300/08
Abstract: A method for efficiently manufacturing low-phosphorus molten steel by use of a steelmaking electric furnace, in which slag resulting from melting a solid iron source is effectively separated from molten steel, and thus a unit consumption of lime required to reduce a phosphorus content in the molten steel is reduced. The method includes: charging a solid iron source and an optional molten iron source and melting and heating these raw materials by using electric energy; partly or entirely removing slag generated during the melting; performing dephosphorization by adding dephosphorization flux; and tapping low-phosphorus molten steel thus refined, and in the method, a slag composition ratio being [CaO]/([SiO2]+[Al2O3]) of the slag to be removed is adjusted to be not less than 0.25 and not more than 0.70.
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公开(公告)号：US11649514B2
公开(公告)日：2023-05-16
申请号：US16957444
申请日：2018-12-12
Applicant: JFE Steel Corporation
Inventor： Kenji Nakase , Yoshie Nakai , Naoki Kikuchi
CPC classification number: C21C1/025 , C21C7/0645 , C22B1/02
Abstract: Proposed is a method for removing phosphorus from a phosphorus-containing substance which is applicable in an industrial scale so as to effectively reduce phosphorus contained in the phosphorus-containing substance. In this method, the phosphorus-containing substance used as a raw material for metal smelting or metal refining is reacted with a nitrogen-containing gas at a treatment temperature T (° C.) which is lower than a melting temperature (Tm) of the substance, so that phosphorus is removed preferably in the form of phosphorus nitride (PN). In this regard, a nitrogen partial pressure and an oxygen partial pressure in the nitrogen-containing gas are preferably controlled, thereby reducing a load of dephosphorization process, for example.
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公开(公告)号：US20220411907A1
公开(公告)日：2022-12-29
申请号：US17756192
申请日：2020-03-23
Applicant: NANJING IRON & STEEL CO., LTD.
Inventor： DongMing DUAN , Chao SUN , YanTang CHEN , YuWe ZHOU , CongDao WANG , Ming LI
Abstract: The present disclosure discloses a 690 MPa high-strength medium-manganese steel with low yield ratio and medium thickness and a manufacture method thereof, which relates to the technical field of steel smelting. The 690 MPa high-strength medium-manganese steel with low yield ratio and medium thickness is composed of the following chemical composition in mass percentage: C: 0.05%-0.10%, Mn: 4.1%-4.7%, Si: 0.15%-0.4%, P≤0.010%, S≤0.003%, Ti: 0.01%-0.05%, Ni+Cr+Mo≤0.6%, and the balance of Fe and unavoidable impurities. The steel plate manufactured meets the safety performance and construction cost requirements of the construction machinery on the ultra-high-strength steel in complex environments.
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