公开(公告)号：US12234521B2

公开(公告)日：2025-02-25

申请号：US18670631

申请日：2024-05-21

Applicant: Xuanhua Iron and Steel Group Co., Ltd. ,  University of Science and Technology Beijing ,  HBZX HIGH TECH CO., LTD.

Inventor： Hongbin Wang ,  Guangsheng Wei ,  Rong Zhu ,  Minghai Zhang ,  Jinlong Wang ,  Jianping Jia ,  Yongqiang Yang ,  Jianzhong Wang ,  Yunxiang Zhao ,  Xin Li ,  Ceng Li ,  Huan Chang

IPC: C21C7/072 ,  C21C5/52 ,  C21C7/00 ,  C21C7/06 ,  C21C7/064 ,  C21C7/10

Abstract: The application provides a method for controlling nitrogen in steelmaking by spraying hydrogen containing plasma, including: using a mixture of hydrogen rich gas and argon gas to generate hydrogen plasma for denitrification of molten steel during at least one of arc furnace smelting, ladle refining, VOD refining, and RH refining. The method for controlling nitrogen in steelmaking by spraying hydrogen containing plasma provided in the application can effectively remove nitrogen from the molten steel by spraying a mixture of argon gas and hydrogen rich gas into the molten steel through a hollow electrode and plasma torch, reducing electrode consumption and electricity consumption per ton steel, and also reducing arc radiation heat loss, improving heating rate, thereby shortening smelting time and reducing production costs.

公开(公告)号：US12146200B1

公开(公告)日：2024-11-19

申请号：US18655340

申请日：2024-05-06

Applicant: University of Science and Technology Beijing

Inventor： Qing Liu ,  Zicheng Xin ,  Jiangshan Zhang

IPC: C21C5/30 ,  C21C7/00

Abstract: A method for controlling a temperature of a molten steel during ladle furnace (LF) refining based on interpretable machine learning includes: acquiring process data of the LF refining and a target temperature of the molten steel during the LF refining; acquiring a prediction model for the temperature of the molten steel during the LF refining; calculating a base value for prediction of the temperature of the molten steel, SHapley Additive explanations (SHAP) values of key factor parameters, and a relationship trend between the key factor parameters and the SHAP values; and calculating a predicted value of the temperature of the molten steel during the LF refining, and acquiring a control result for the temperature of the molten steel during the LF refining according to the relationship trend and the predicted value of the temperature of the molten steel during the LF refining.

公开(公告)号：US12138674B2

公开(公告)日：2024-11-12

申请号：US18342454

申请日：2023-06-27

Applicant: Saudi Arabian Oil Company

Inventor： Oladele Owoeye ,  Fauzia Rahman Eko Waluyo

IPC: C22C38/48 ,  B21B19/04 ,  C21C5/00 ,  C21C5/52 ,  C21C5/56 ,  C21C7/00 ,  C22C38/00 ,  C22C38/02 ,  C22C38/10 ,  C22C38/44

Abstract: A corrosion resistant alloy suitable for use as a seamless tubular is described. The corrosion resistant alloy includes 13-15 wt. % chromium, 5-7 wt. % nickel, and 2.5-4.5 wt. % molybdenum. The balance of the corrosion resistant alloy is iron.

公开(公告)号：US12134799B2

公开(公告)日：2024-11-05

申请号：US17603593

申请日：2020-03-31

Applicant: NIPPON STEEL CORPORATION

Inventor： Norifumi Asahara ,  Katsuhiko Kato ,  Mikio Futaka ,  Yasuhiro Tanaka ,  Naoki Kaneko ,  Junichi Nakagawa

IPC: C21C7/00 ,  C21C5/00 ,  C21C5/52 ,  C21C5/54 ,  C22C33/04

Abstract: A charged material containing a metal raw material of at least one of ferrochromium containing metal Si or ferrosilicon and unreduced slag containing Cr oxide generated by oxidation refining is charged into an AC electric furnace including three electrodes, a mass ratio of a metal Si amount to a Cr oxide amount being from 0.30 to 0.40, and a C concentration being from 2.0% by mass to a saturation concentration.

公开(公告)号：US20240309479A1

公开(公告)日：2024-09-19

申请号：US18574384

申请日：2022-06-17

Applicant: JOHN COCKERILL S.A.

Inventor： Thomas Thoelen

IPC: C21C7/00

CPC classification number: C21C7/0087

Abstract: 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

Applicant: Charm Industrial, Inc.

Inventor： Peter Reinhardt ,  Brian Jamieson

IPC: C21C7/00

CPC classification number: C21C7/0025 ,  C21C2007/0031 ,  C21C2100/02

Abstract: 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

Applicant: JFE STEEL CORPORATION

Inventor： Futoshi OGASAWARA ,  Ryo KAWABATA

IPC: C21C5/52 ,  C21C7/00

CPC classification number: C21C5/5217 ,  C21C7/0037

Abstract: 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

Applicant: ArcelorMittal

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

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

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

Abstract: 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

Applicant: SUNCOKE TECHNOLOGY AND DEVELOPMENT LLC

Inventor： John Francis Quanci ,  Jonathan Hale Perkins ,  John Michael Richardson

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

CPC classification number: C21C7/0025 ,  C10B5/02 ,  C10B53/02 ,  C10B57/06 ,  C10B57/16

Abstract: 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

Applicant: FOSECO INTERNATIONAL LIMITED

Inventor： David HRABINA ,  Colin POWELL

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

CPC classification number: C21C5/4613 ,  C21C7/0056 ,  C21C7/072 ,  C21C7/076 ,  C21C5/462

Abstract: 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.