公开(公告)号：US20250019301A1

公开(公告)日：2025-01-16

申请号：US18705392

申请日：2022-10-05

Applicant: KHD HUMBOLDT WEDAG GMBH

Inventor： Marc FEISS ,  Rolf GUSSMANN ,  Norbert STREIT

IPC: C04B7/12 ,  C04B7/36 ,  C04B7/40 ,  C04B7/45 ,  C04B7/47 ,  F27B15/00 ,  F27D3/00 ,  F27D13/00 ,  F27D17/00

Abstract: A process for activating clays having high residual moisture by: feeding wet clay into a device for drying, comminuting the previously dried clay in a device for comminuting, thermally activating the comminuted clay in an entrained flow reactor or in a fluidized bed reactor in which the comminuted clay is in suspension in a hot gas, removing the gas from the entrained flow reactor or the fluidized bed reactor in a device for removing, and cooling the thermally activated clay in a device for cooling with a cooling gas, and to a corresponding plant. The cooling gas, heated after cooling the thermally activated clay, is combined with the gas from the reactor, and the combined gases are introduced into the drying device. The drying air is filtered after drying, and clay removed by filtration is unified with the dried clay.

公开(公告)号：US20230032262A1

公开(公告)日：2023-02-02

申请号：US17758367

申请日：2020-12-14

Applicant: Tenova S.p.A.

Inventor： Cesare Giavani ,  Silvio Maria Reali

IPC: F27D17/00 ,  F23N3/00 ,  F23C7/00 ,  F27D13/00 ,  F27B3/18

Abstract: A process and plant for preheating a metal charge fed in continuous to an electric melting furnace through a preheating tunnel provided with side walls, a vault and a horizontal conveyor, wherein the metal charge is enveloped in countercurrent by fumes or exhaust gases exiting from the electric melting furnace, includes causing an air intake from the surrounding environment through openings along the preheating tunnel to complete the combustion of the fumes or exhaust gases. The intake is regulated by acting on suction fans and/or on the openings, based on measurements by temperature sensors and/or the composition of the outgoing gases in or downstream of the terminal part of the tunnel. The metal charge is enveloped by jets of gas ejected through a plurality of nozzles arranged non-uniformly longitudinally on the vault of the tunnel, with a greater concentration on the top of the vault of the tunnel.

公开(公告)号：US11471925B2

公开(公告)日：2022-10-18

申请号：US15097320

申请日：2016-04-13

Applicant: Venugopal Garimella ,  Darren Womack ,  Erryn Ashmore ,  Tom Sanor ,  Edward Schleichert ,  Tarlok Singh Kainth ,  Tracy Arnold Grant Taylor ,  James Arminski ,  Kevin VanDenBrouck

Inventor： Venugopal Garimella ,  Darren Womack ,  Erryn Ashmore ,  Tom Sanor ,  Edward Schleichert ,  Tarlok Singh Kainth ,  Tracy Arnold Grant Taylor ,  James Arminski ,  Kevin VanDenBrouck

IPC: F27B3/04 ,  B21D22/02 ,  C22F1/04 ,  F27B9/02 ,  C21D9/00 ,  F27B9/30 ,  F27B9/24 ,  F27D3/00 ,  F27D5/00 ,  F27D13/00 ,  F27D15/00 ,  F27B1/02

Abstract: A multi-opening oven assembly for simultaneously heating a plurality of blanks, for example aluminum blanks, before forming the heated blanks in a production line is provided. The oven assembly includes vertically aligned shelves to present a plurality of chambers for heating the blanks. A table including an entry side platform and an exit side platform moves vertically along the oven assembly. A rail system extends along the platforms and the shelves to convey the blanks in and out of the chambers. Once one set of heated blanks is removed from a first chamber, the table moves vertically to a second chamber and is ready to receive the next set of heated blanks. A continuous supply of heated blanks is provided for high throughput. The oven assembly is preferably disposed in a press adjacent a forming station of an existing production line and thus, no additional floor space is required.

公开(公告)号：US11268765B2

公开(公告)日：2022-03-08

申请号：US16840842

申请日：2020-04-06

Applicant: Novelis Inc.

Inventor： David Michael Custers ,  Michael Bull ,  Andrew Hobbis

IPC: F27D13/00 ,  C21D9/46 ,  C21D1/42 ,  C21D1/52 ,  F27D11/06 ,  F27D19/00 ,  C21D11/00 ,  C21D9/56 ,  C21D9/60

Abstract: System and method for using fast response heaters to pre-heat metal before entering a metal treatment furnace, which may improve control over metal processing, especially in response to changes in material, mass flow rate, line speed, and/or desired treatment process. Fast response heaters may be used with control systems to adjust the output of the fast response heater based on operator inputs, direct or indirect sensing of process parameters, and/or the use of thermal models to quickly adjust fast response heater output while a metal treatment furnace remains at a constant temperature or slowly transitions into a new operating state. The resulting gains in process control result in higher quality products, reduced scrap, and increases in line speed and output.

公开(公告)号：US20220065535A1

公开(公告)日：2022-03-03

申请号：US17411774

申请日：2021-08-25

Applicant: RES POLYFLOW LLC

Inventor： Jay SCHABEL ,  George W. STREKAL ,  Richard A. SCHWARZ ,  Mehmet A. GENCER ,  Richard K. PETERSON ,  Cassten EVERIDGE ,  Laura Christine STRONG

IPC: F27D3/08 ,  C10G1/10 ,  B01J4/00 ,  B01J6/00 ,  F27D13/00

Abstract: A plastic conversion feeding system serves to transport a feedstock through different processing units or stations to a vessel wherein chemical and/or physical reactions occur to produce suitable, useful end products. Various processing units include a homogenizer for breaking up said feedstock, a size reduction device for reducing the feedstock to particles and densifying the same, a heating and/or blending device for heating said feedstock, and a feed conduit connecting said heating and blending device to said vessel. The feedstock conversion unit vessel through various cracking, reforming, condensation, recombination, and recracking operations, produces a mixture of useful gases and condensable gases.

公开(公告)号：US20220024818A1

公开(公告)日：2022-01-27

申请号：US17384672

申请日：2021-07-23

Applicant: Furno Materials Inc.

Inventor： Gurinder Nagra

IPC: C04B7/44 ,  C04B7/47 ,  F27B1/02 ,  F27B1/20 ,  F27D13/00 ,  F27B1/08

Abstract: High temperature furnaces, calcining, pyrolysis and other high temperature manufacturing processes, composition rearrangements, and equipment. Systems, equipment and processes using oxyfuel combustion using gaseous fuels for cement manufacture. Reactor furnaces using oxyfuel containing natural gas and gravity feed to process pellets forming a pellet bed into cement.

公开(公告)号：US20210364237A1

公开(公告)日：2021-11-25

申请号：US17397021

申请日：2021-08-09

Applicant: Air Products and Chemicals, Inc.

Inventor： Gregory J. Buragino ,  Anup Vasant Sane ,  Shailesh Pradeep Gangoli ,  Xiaoyi He ,  Larry Saul Zelson

IPC: F27D13/00 ,  C22B1/02 ,  F27D3/00 ,  F27B3/08 ,  C21B13/00 ,  C21C5/52

Abstract: A method for preheating metal pellets before charging into a melting furnace, wherein the pellets are transported by a conveyor belt to a chute and discharged from the chute into the melting furnace, the method including heating the pellets by direct flame impingement from two or more banks of burners, wherein the two or more banks of burners comprise an upstream bank of burners and a downstream bank of burners; and controlling the upstream bank of burners to operate oxygen-rich so as to create an oxidizing zone and the downstream bank of burners to operate fuel-rich so as to create a reducing zone.

公开(公告)号：US20210262048A1

公开(公告)日：2021-08-26

申请号：US17256202

申请日：2019-07-09

Applicant: Tenova S.p.A.

Inventor： Silvio Maria Reali ,  Cesare Giavani

IPC: C21C5/56 ,  F27B3/18 ,  F27D13/00 ,  F27D17/00

Abstract: A process and a plant for preheating a metal charge fed in continuous to an electric melting furnace through a preheating tunnel provided with a horizontal conveyor, wherein the metal charge is hit, in countercurrent, by the exhaust fumes or gas leaving the electric melting furnace and by jets of gas ejected through a plurality of nozzles positioned on the hood of the tunnel. The nozzles are arranged in groups interspaced from each other in a longitudinal direction with respect to the tunnel, and generate a small-scale turbulence or inject small fast gas jets that can penetrate the main gas stream passing through the preheating tunnel, and simultaneously generate a “horseshoe vortex” structure composed of a descending central gas flow (“downwash”), and ascending flows (“upwash”) close to the side walls of the preheating tunnel, which enable a desidered circulation of the gases.

公开(公告)号：US10935318B2

公开(公告)日：2021-03-02

申请号：US16064216

申请日：2016-12-16

Applicant: ARCELORMITTAL

Inventor： Jean-Claude Baumert ,  Jean-Claude Thibaut ,  Marco Picco

IPC: F27B3/18 ,  C21C5/56 ,  F27B3/28 ,  F27D13/00 ,  F27D19/00 ,  F27D21/02

Abstract: A method and a system for determining a mass of feedstock discharged by a conveyor during a first time interval Δt are disclosed. The method includes taking successive digital images of the feedstock in a specific zone of the conveyor being separated by a second time interval δt of smaller duration than the first time interval Δt, for each of the second time intervals δt: computing the advancing distance of a sub-volume of feedstock during the second time interval δt in the specific zone of the conveyor by numerical treatment of the two successive images associated with the second time interval δt; determining at least one transversal height profile of the sub-volume of feedstock; and determining an effective feedstock density for the sub-volume of feedstock. The method further includes computing the mass of feedstock discharged by the conveyor during the first time interval Δt into the metallurgical furnace on the basis of the advancing distance, the at least one transversal height profile and the effective feedstock density, computed or determined for each of the second time intervals δt.

公开(公告)号：US10928136B2

公开(公告)日：2021-02-23

申请号：US15911957

申请日：2018-03-05

Applicant: CISDI ENGINEERING CO., LTD

Inventor： Qiming Huang ,  Zhan Gao ,  Weizhi Shi ,  Cunzhen Tan

IPC: F27D13/00 ,  F27B3/18 ,  F27D17/00 ,  C21C5/56 ,  F27D3/00 ,  C21C5/52

Abstract: The present invention discloses a scrap steel preheating type electric arc furnace and a method for improving a heating cold region of a side wall charging electric arc furnace. This invention includes an electric arc furnace body and an inclined scrap steel preheating chamber. An included angle between the inclined scrap steel preheating chamber and a horizontal plane is 30° to 65°. Flue gas enters the inclined scrap steel preheating chamber, penetrates through the material blocking tooth rake and the scrap steel and is sucked out. The preheated scrap steel slides to a center of the electric arc furnace body along a slot bottom of the inclined scrap steel preheating chamber. The present invention overcomes a problem of lateral stacking of the side wall charging electric arc furnace, reducing impact force of the scrap steel to the device and greatly enhancing reliability of the device.