公开(公告)号：US20240309479A1

公开(公告)日：2024-09-19

申请号：US18574384

申请日：2022-06-17

申请人： JOHN COCKERILL S.A.

发明人： Thomas Thoelen

IPC分类号： C21C7/00

CPC分类号： C21C7/0087

摘要： An industrial installation for recovering waste radiative heat from steel slag includes: a pit in which molten steel slag is discharged and from which solidified steel slag is removed, using a slag conveying machine or vehicle; an evaporating device for producing hot water and steam and auxiliary equipment, the evaporating device including a heat exchanger having tube-cooled walls; a steel structure supporting the evaporating device; and a lifting system including jacks, such that the heat exchanger is movable vertically from an upper standby position to a lower working position and vice versa. The tube-cooled walls are made of a metal, allowing the heat exchanger to work in an environment presenting sharp temperature gradients and corrosion.

公开(公告)号：US20240229176A1

公开(公告)日：2024-07-11

申请号：US18409428

申请日：2024-01-10

申请人： Charm Industrial, Inc.

发明人： Peter Reinhardt ,  Brian Jamieson

IPC分类号： C21C7/00

CPC分类号： C21C7/0025 ,  C21C2007/0031 ,  C21C2100/02

摘要： Disclosed herein, in some aspects, are systems and methods for producing a material comprising iron through self-reduction of iron ore using bio-oil and/or other reducing agents (e.g., bio-based reducing agents), such as biocrude, ethanol, or other bio-based liquids or biologically sourced liquids. The bio-oil and/or other reducing agents can be mixed with the iron ore to form a furnace mixture, which can be heated, such that the components of the bio-oil and/or other reducing agents in the furnace mixture reduce the iron ore to form an iron product (e.g., a material that includes metallic iron). In some cases, the pre-formed furnace mixture allows for the reducing agents to interact with the iron more readily, thereby providing for quicker reaction rates, and thereby quicker reduction of iron ore, as compared to direct reduction iron production.

公开(公告)号：US20240191315A1

公开(公告)日：2024-06-13

申请号：US18287140

申请日：2022-04-08

申请人： JFE STEEL CORPORATION

发明人： Futoshi OGASAWARA ,  Ryo KAWABATA

IPC分类号： C21C5/52 ,  C21C7/00

CPC分类号： C21C5/5217 ,  C21C7/0037

摘要： An electric furnace has a burner directed toward furnace contents. The burner includes a powder-feeding pipe, a jet hole for jetting a fuel, and a jet hole for jetting combustion-supporting gas. Hydrogen gas or a hydrogen-enriched gaseous fuel is jetted as the fuel to form a burner flame. An auxiliary material is jetted through the powder-feeding pipe so that the auxiliary material passes through an inside of the burner flame. According to a steelmaking method, an electric furnace has a burner that includes a jet hole for jetting a fuel and a jet hole for jetting combustion-supporting gas and that jets a flame through the jet holes toward an inside of the electric furnace. Hydrogen gas or a hydrogen-enriched gaseous fuel is used as the fuel of the burner, and an auxiliary material is blown in to pass through an inside of the flame formed by the burner.

公开(公告)号：US20240165704A1

公开(公告)日：2024-05-23

申请号：US18283774

申请日：2021-04-06

申请人： ArcelorMittal

发明人： Enrique HERRAIZ LALANA ,  Mathieu COUVRAT ,  Pallava KAUSHIK ,  Alejandro CARO GUTIERREZ

IPC分类号： B22F9/08 ,  B33Y70/00 ,  C21C5/52 ,  C21C7/00 ,  C21C7/068 ,  C21C7/10 ,  C22C33/06

CPC分类号： B22F9/082 ,  C21C5/5241 ,  C21C7/0006 ,  C21C7/068 ,  C21C7/10 ,  C22C33/06 ,  B22F2009/0824 ,  B22F2009/0848 ,  B22F2301/35 ,  B22F2998/10 ,  B33Y70/00

摘要： A process for the production of steel powders including the steps of: providing molten iron from a blast furnace, refining the molten iron in a converter to form molten steel including up to 600 ppm C, up to 120 ppm S, up to 125 ppm P, up to 50 ppm N and up to 1200 ppm O, pouring the molten steel in a plurality of induction furnaces, adding, in each of the plurality of induction furnaces, at least one ferroalloy to adjust the steel composition, pouring the molten steel at the desired composition of each induction furnace in a dedicated reservoir connected to at least one gas atomizer, feeding the at least one gas atomizer of each reservoir in molten steel from each reservoir under pressure and gas atomizing the molten steel to form the steel powder at the desired composition.

公开(公告)号：US20240158877A1

公开(公告)日：2024-05-16

申请号：US18511148

申请日：2023-11-16

申请人： SUNCOKE TECHNOLOGY AND DEVELOPMENT LLC

发明人： John Francis Quanci ,  Jonathan Hale Perkins ,  John Michael Richardson

IPC分类号： C21C7/00 ,  C10B5/02 ,  C10B53/02 ,  C10B57/06 ,  C10B57/16

CPC分类号： C21C7/0025 ,  C10B5/02 ,  C10B53/02 ,  C10B57/06 ,  C10B57/16

摘要： Mixture products containing charred products and coal or coke, and associated systems, devices and methods are disclosed herein. The charred product components of the mixture products can be made by receiving an input material in an oven, and heating the oven containing the input material to a predetermined temperature of at least 900° F. for a predetermined time of no more than 48 hours to produce a charred product. Advantageously, embodiments of the present technology can enable a more efficient mixture product production process. The resulting mixture products can also have higher quality in terms of desired Coke Strength After Reaction (CSR), Coke Reactivity Index (CRI), volatile matter content, ash content, sulfur content, grain size, etc.

公开(公告)号：US20240052444A1

公开(公告)日：2024-02-15

申请号：US18258150

申请日：2021-12-17

申请人： FOSECO INTERNATIONAL LIMITED

发明人： David HRABINA ,  Colin POWELL

IPC分类号： C21C5/46 ,  C21C7/00 ,  C21C7/072 ,  C21C7/076

CPC分类号： C21C5/4613 ,  C21C7/0056 ,  C21C7/072 ,  C21C7/076 ,  C21C5/462

摘要： A rotary device and methods for treating molten metal, a tubular sleeve for said rotary device and the use of said rotary device in the treatment of molten metal. The rotary device comprises: a tubular sleeve comprising a rotor head at one end, the rotor head comprising a gas outlet for dispersing gas into molten metal; and a hollow shaft extending inside the tubular sleeve such that at least a portion of the hollow shaft is enclosed by the tubular sleeve, wherein the hollow shaft is fluidly connected to the gas outlet of the rotor head, the tubular sleeve is formed from a refractory material that is resistant to corrosion and thermal shock, and the hollow shaft is formed from a material comprising graphite. A first method comprises: applying a layer of synthetic slag material onto an exposed surface of the molten metal; and stirring the molten metal using a rotary device comprising a rotor head, such that the molten metal flows past the layer of synthetic slag material. A second method comprises: applying a metal treatment agent to molten metal; stirring the molten metal using a rotary device comprising a rotor head; and discharging gas into the molten metal through the rotor head.

公开(公告)号：US20230323492A1

公开(公告)日：2023-10-12

申请号：US18132521

申请日：2023-04-10

申请人： United States Steel Corporation

发明人： Yun Li ,  David L. Runner ,  Jonathan D. Youngblood ,  Scott R. Story

IPC分类号： C21C7/068 ,  C21C5/52 ,  C21C7/00 ,  C21C7/06 ,  C21C7/064 ,  C22C38/00

CPC分类号： C21C7/068 ,  C21C5/52 ,  C21C7/0075 ,  C21C7/06 ,  C21C7/064 ,  C22C38/004

摘要： The present disclosure provides a method of making non-grain oriented (NGO) electrical steel. The method includes tapping the liquid steel out of a primary steelmaking furnace. Deoxidizing the liquid steel before or after transferring the deoxidized liquid steel to a ladle metallurgy furnace. Removing sulfur at the ladle metallurgy furnace (LMF). Adding fluxes and deoxidizer to the ladle slag and/or skimming off ladle slag to prevent sulfur reversion. Transferring the liquid steel from the ladle metallurgy furnace to an RH degasser for carbon removal by blowing oxygen. Adding fluxes at the RH before oxygen blowing to fortify the bottom layer of the ladle slag to prevent sulfur reversion. 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 of adding fluxes and arcing for sulfur removal if sulfur removal is carried out at the LMF after carbon removal at the RH degasser in the conventional process. Oxygen blowing at the RH also lowered the titanium pickup from the earlier desulfurization process. The ultra low levels of carbon, nitrogen, sulfur, and titanium in the NGO steel made using this method enabled the excellent magnetic properties achieved in the finishing NGO products.

公开(公告)号：US11732337B2

公开(公告)日：2023-08-22

申请号：US17325619

申请日：2021-05-20

申请人： NORTHEASTERN UNIVERSITY

发明人： Huabing Li ,  Zhouhua Jiang ,  Hao Feng ,  Lingfeng Xia ,  Hongchun Zhu ,  Shucai Zhang ,  Weichao Jiao

IPC分类号： C22C38/00 ,  C21D6/00 ,  C22B9/18 ,  C21C7/00

CPC分类号： C22C38/001 ,  C21C7/0075 ,  C21D6/002 ,  C21D6/005 ,  C22B9/18 ,  C21D2211/001

摘要： The present disclosure provides a method for producing a high nitrogen steel by a duplex melting process of a pressurized ladle refining and a pressurized electroslag remelting, which relates to the technical field of high nitrogen steel melting. In the present disclosure, the molten steel is subjected in sequence to a nitrogen alloying, a deep deoxidation and a deep desulfurization by adding a nickel-magnesium alloy and rare earth in the pressurized ladle furnace, and a combination of a blowing nitrogen from the bottom of the pressurized ladle and a pressurized nitriding at the interface of gas and the molten steel is used to achieve a high-efficiency nitrogen alloying, a uniform nitrogen distribution, and a decreased impurity content in the ingot; then the ingot is subjected to a pressurized electroslag remelting to obtain a high nitrogen steel.

公开(公告)号：US20230220504A1

公开(公告)日：2023-07-13

申请号：US17928185

申请日：2021-06-07

申请人： LAIWU STEEL YINSHAN SECTION CO., LTD.

发明人： Heng MA ,  Kang HE ,  Zhongxue WANG ,  Tengfei WANG ,  Wenpeng ZOU ,  Chuanzhi DU ,  Aijiao CHEN ,  Pei ZHANG ,  Wei NING ,  Yuexiang WANG

IPC分类号： C21C7/06 ,  C21C7/00 ,  C21C7/10 ,  C21C5/34 ,  C21C5/36

CPC分类号： C21C7/06 ,  C21C7/0087 ,  C21C7/10 ,  C21C5/34 ,  C21C5/36 ,  C21C7/0006 ,  C21C2007/0093

摘要： An ultra-high phosphorus molten iron low-cost smelting method for polar steel includes successively deoxidizing and tapping alloying raw materials including molten iron; performing slag adjusting and refining on the molten steel obtained in the converter smelting step to obtain a refined molten steel; vacuum degassing the refined molten steel; and performing continuous casting on the molten steel obtained after the RH degassing step to obtain a cast billet.

公开(公告)号：US11655512B2

公开(公告)日：2023-05-23

申请号：US17641732

申请日：2019-09-29

申请人： INSTITUTE OF METAL RESEARCH CHINESE ACADEMY OF SCIENCES

发明人： Dianzhong Li ,  Yikun Luan ,  Pei Wang ,  Xiaoqiang Hu ,  Paixian Fu ,  Hongwei Liu ,  Lijun Xia ,  Chaoyun Yang ,  Hanghang Liu ,  Hang Liu ,  Yiyi Li

IPC分类号： C21C7/00 ,  C21C7/10 ,  C22C33/04 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00

CPC分类号： C21C7/0006 ,  C21C7/10 ,  C22C33/04 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06

摘要： Provided in the present application are a rare-earth microalloyed steel and a control process. The steel has a special microstructure, and the microstructure comprises a rare earth-rich nanocluster having a diameter of 1-50 nm. The nanocluster has the same crystal structure type as a matrix. The rare earth-rich nanocluster inhibits the segregation of the elements S, P and As on a grain boundary, and obviously improves the fatigue life of the steel. In addition, a rare-earth solid solution also directly affects a phase change dynamics process so that the diffusion-type phase change starting temperature in the steel changes at least to 2° C., and even changes to 40-60° C. in some kinds of steel, thereby greatly improving the mechanical properties thereof, and providing a foundation for the development of more kinds of high-performance steel.