公开(公告)号：KR20180039686A

公开(公告)日：2018-04-18

申请号：KR20187006856

申请日：2016-09-12

Applicant: JFE STEEL CORP

Inventor： MATSUI AKITOSHI ,  ITOH YOICHI ,  MIKI YUJI ,  TANAKA TOMOHIRO ,  MITSUZONO MASAYUKI ,  CHIYOHARA RYOSUKE ,  NISHIKORI MASANORI

IPC: B22D11/117 ,  B22D11/115

CPC classification number: B22D11/10 ,  B22D11/11 ,  B22D11/115

Abstract: 고품질인슬라브주편을제조하는것이가능한연속주조방법을제공한다. 연속주조방법에서는, 연속주조용주형내에침지노즐을배치하고, 그침지노즐에용강을공급하여주조한다. 침지노즐은, 그연직축에대하여대칭으로배치되는한 쌍의토출구멍을가진다. 침지깊이를 180mm 이상 300mm 미만, 용강토출각도를 15∼35°의범위내, 취입되는불활성가스의유량 A와용강스루풋 P의비 A/P를 2.0∼3.5NL/ton의범위내로한다. 침지노즐의토출방향을, 침지노즐의연직축중심을지나주형장변면에평행한기준면에대하여 (1)식의범위내에서경사시킨다. θ-6≤α≤θ+10…(1) (1)식에있어서, α는, 기준면에대한경사각도이다. θ는, 하기 (2)식에의해정의되는각도이다. tanθ=(D/2)/(W/2)…(2) (2)식에있어서, D는, 슬라브주편의두께이다. W는슬라브주편의폭이다.

公开(公告)号：BR112022004874A2

公开(公告)日：2022-06-07

申请号：BR112022004874

申请日：2020-09-04

Applicant: JFE STEEL CORP

Inventor： MATSUI AKITOSHI ,  SATO MIHO ,  MASUDA RYOSUKE ,  MORITA SHUGO ,  KORIYAMA TAIGA ,  HAYASHIDA TATSURO ,  HASHIMOTO YOSHINARI

IPC: B22D11/16 ,  B22D11/055 ,  B22D11/22 ,  B22D46/00

Abstract: aparelho de estimativa de espessura de casca solidificada em molde, método de estimativa de espessura de casca solidificada em molde, e método de lingotamento de aço contínuo. um aparelho de estimativa de espessura de casca solidificada em molde de acordo com a presente invenção inclui uma calculadora de modelo de transferência de calor que estima uma espessura de casca solidificada em molde ao calcular distribuições de temperatura de um molde e aço fundido dentro do molde ao resolver uma equação de transferência de calor instável tridimensional usando um resultado de medição de uma temperatura do aço fundido em uma panela intermediária de uma instalação de lingotamento contínuo, resultados de medição de uma largura de um cordão sendo lingotado e de uma velocidade de lingotamento na instalação de lingotamento contínuo, resultados de medição de uma temperatura de uma placa de cobre de molde e de uma quantidade de calor removida a partir do molde na instalação de lingotamento contínuo, e valores de inserção de uma composição química do aço fundido e da espessura do cordão; e uma fórmula de modelo e um parâmetro relacionado a uma reação de solidificação do aço fundido dentro do molde da instalação de lingotamento contínuo. a calculadora de modelo de transferência de calor então corrige erros na temperatura da placa de cobre de molde e na quantidade de calor removida a partir do molde ao corrigir um coeficiente de transferência de calor global entre a placa de cobre de molde e a casca solidificada.

公开(公告)号：BRPI0909687A2

公开(公告)日：2015-09-22

申请号：BRPI0909687

申请日：2009-03-03

Applicant: JFE STEEL CORP

Inventor： MATSUI AKITOSHI ,  OGASAWARA FUTOSHI ,  KISHIMOTO YASUO ,  UCHIDA YUICHI

IPC: C21C1/02 ,  C21C1/04 ,  C22B7/00 ,  C22B9/10 ,  F27B1/00

公开(公告)号：IN11261DEN2014A

公开(公告)日：2015-10-09

申请号：IN11261DEN2014

申请日：2014-12-31

Applicant: JFE STEEL CORP

Inventor： ISHIGAKI YUSUKE ,  NISHINA YOSHIAKI ,  HASHITANI RYOJI ,  KIKUCHI NAOKI ,  MATSUI AKITOSHI

IPC: C21C1/02 ,  F27D27/00

Abstract: The purpose of the present invention is to reduce vibration in a stirring device comprising a rotating shaft and impeller even if the rotational speed of the impeller is increased to improve reaction efficiency in molten iron preliminary treatment which is carried out while the stirrer is used to agitate the molten iron by rotating the impeller while immersed in the molten iron. This molten iron preliminary treatment method is a molten iron preliminary treatment method in which an impeller (3) attached to a tip part of a rotating shaft (2) is immersed in molten iron (5) within a smelting vessel (4) and in which the molten iron and an additive (6) is stirred by rotating the impeller that is immersed. Stirring is carried out with the resonant frequency of a primary curve of the rotating shaft is made larger than the rotational frequency of the impeller stirring the molten iron.

公开(公告)号：MX2010009609A

公开(公告)日：2010-09-30

申请号：MX2010009609

申请日：2009-03-03

Applicant: JFE STEEL CORP

Inventor： MATSUI AKITOSHI ,  UCHIDA YUICHI ,  KISHIMOTO YASUO ,  OGASAWARA FUTOSHI

IPC: C21C1/04 ,  C21C1/02 ,  C22B7/00 ,  C22B9/10 ,  F27B1/00

Abstract: En la producción de acero de alto grado usando chatarras de acero que contienen cobre como la fuente de hierro, el cobre contenido en las chatarras puede ser removido de manera eficiente sin instalaciones grandes sometiendo las chatarras de acero que contienen cobre a fusión por carburización para formar un metal caliente para fabricar acero, removiendo el cobre contenido en el metal caliente mediante el uso de un flujo que contiene azufre, y removiendo entonces el azufre contenido en el metal caliente resultante. Se prefiere usar flujo a base de Na2S como el flujo que contiene azufre, dado que la remoción del cobre contenido en el metal caliente debe ser llevada a cabo en un equipo de refinación del tipo de agitación mecánica o por un método de inyección de flujo o que un metal caliente que tenga un contenido de azufre relativamente alto sea producido usando un horno de eje provisto con un lecho de material carbonáceo en él y entonces sometido al tratamiento de remoción del cobre anterior.

公开(公告)号：CA2715322A1

公开(公告)日：2009-09-11

申请号：CA2715322

申请日：2009-03-03

Applicant: JFE STEEL CORP

Inventor： MATSUI AKITOSHI ,  UCHIDA YUICHI ,  KISHIMOTO YASUO ,  OGASAWARA FUTOSHI

IPC: C21C1/04 ,  C21C1/02 ,  C22B7/00 ,  C22B9/10 ,  F27B1/00

Abstract: In producing high-grade steel by using copper-containing steel scraps as the iron source, the copper contained in the scraps can be efficiently removed without large facilities by subjecting the copper-containing steel scraps to carburization melting to form a hot metal for steelmaking, removing the copper contained in the hot metal by the use of a sulfur-containing flux, and then removing the sulfur contained in the resulting hot metal. It is preferable that an Na2S-base flux be used as the sulfur-containing flux, that the removal of the copper contained in the hot metal be carried out either in mechanical stirring type refining equipment or by a flux injection method, or that a hot metal having a relatively high sulfur content be produced by using a shaft furnace provided with a carbonaceous material bed therein and then subjected to the above copper removal treatment.

公开(公告)号：RU2768098C1

公开(公告)日：2022-03-23

申请号：RU2021109002

申请日：2019-09-05

Applicant: JFE STEEL CORP

Inventor： HARADA AKIFUMI ,  MATSUI AKITOSHI ,  ODA YOSHIHIKO ,  OKUBO TOMOYUKI ,  UESAKA MASANORI

IPC: C22C38/06 ,  C21C7/06 ,  C22C38/16 ,  C22C38/20 ,  C22C38/34 ,  C22C38/40 ,  C22C38/60 ,  H01F1/147 ,  H01F1/16

Abstract: Изобретениеотноситсяк областиметаллургии, аименнок изготовлениюсляба, используемомув качествематериаладлялистаизнеструктурированнойэлектротехническойстали. Способвключаетв себярафинированиерасплавленнойстали, выпущеннойизконвертераилиэлектродуговойпечи, сиспользованиемустройствадлявакуумнойдегазации, инепрерывнуюразливкурасплавленнойсталис использованиеммашинынепрерывнойразливкидляполучениясляба. Впроцессерафинированияпосредствомустройствадлявакуумнойдегазациидляраскислениярасплавленнойсталипутёмиспользования Si добавляютметаллический Si или Si-содержащийсплав. Красплавленнойстали, раскисленнойпутёмиспользования Si, входерафинирования, выполняемогопосредствомустройствадлявакуумнойдегазации, илипослеокончаниярафинирования, выполняемогопосредствомустройствадлявакуумнойдегазации, добавляютРЗМ-содержащийсплав, азатемк расплавленнойсталив ковшедобавляют Ca-содержащийсплав. Слябимеетхимическийсостав, включающийв себя, вмас.%: 0,0050 илименьше C, от 1,5 до 5,0 Si, от 0,2 до 3,0 Mn, 0,0030 илименьшераств. Al, 0,2 илименьше P, 0,0050 илименьше S, 0,0040 илименьше N, от 0,0010 до 0,0080 T.Ca, 0,0100 илименьше T.O, от 0,0001 до 0,0050 РЗМ, остальноепредставляетсобой Fe инеизбежныепримеси. Слябможетдополнительносодержатьпоменьшеймереодинизэлементовгрупп A-C: группа A состоитизодногоилиобоихэлементов, выбранныхиз Sn и Sb, каждогов количествеот 0,01 до 0,1 мас.%, группа B состоитиз Mg вколичествеот 0,0001 до 0,0050 мас.% игруппа C состоитизпоменьшеймереодногоэлемента, выбранногоиз Cu, Ni и Cr, каждогов количествеот 0,01 до 0,5 мас.%. Вслябезначениедробноговыражения ((T.Ca + РЗМ) / (T.O + S)), котороеявляетсявыражениемсоотношениймассчетырёхкомпонентов, включая T.Ca, РЗМ, T.O и S, составляет 0,4 илибольше, значениедробноговыражения ((мас.% CaO + мас.% оксидовРЗМ)/(мас.% CaO + мас.% оксидовРЗМ + мас.% SiO2+ мас.% Al2O3)), котороеявляетсявыражениемотношенияконцентраций CaO иоксидовРЗМк концентрациямвключенийнаосновеоксидов, составляет 0,50 илибольше, адробноговыражения (мас.% Al2O3/(мас.% CaO + мас.% оксидовРЗМ + мас.% SiO2+ мас.% Al2O3)), котороеявляетсявыражениемотношенияконцентрации Al2O3кконцентрациямуказанныхвышевключенийнаосновеоксидов, составляет 0,20 илименьше. Получаемыеизслябалистынеструктурированнойэлектротехническойсталиобладаютвысокойплотностьюмагнитногопотокаи низкойпотерейв железе. 2 н. и 2 з.п. ф-лы, 4 табл., 2 пр.

公开(公告)号：CA3111121A1

公开(公告)日：2020-04-09

申请号：CA3111121

申请日：2019-09-05

Applicant: JFE STEEL CORP

Inventor： HARADA AKIFUMI ,  MATSUI AKITOSHI ,  ODA YOSHIHIKO ,  OKUBO TOMOYUKI ,  UESAKA MASANORI

IPC: C22C38/00 ,  C21C7/04 ,  C21C7/06 ,  C21C7/10 ,  C21D8/12 ,  C21D9/46 ,  C22C38/06 ,  C22C38/60 ,  H01F1/147

Abstract: Provided is a non-oriented electromagnetic steel sheet that has a low Al content, supports an excellent iron scrap recyclability, and exhibits a low iron loss at high magnetic flux densities. The non-oriented electromagnetic steel sheet according to the present invention has a component composition that contains not more than 0.0050 mass% of C; 1.5 to 5.0 mass% of Si; 0.2 to 3.0 mass% of Mn; not more than 0.0030 mass% of sol. Al; not more than 0.2 mass% of P; not more than 0.0050 mass% of S; not more than 0.0040 mass% of N; 0.0010 to 0.0080 mass% of T. Ca; not more than 0.0100 mass% of T. O; and 0.0001 to 0.0050 mass% of REM, wherein the balance includes Fe and unavoidable impurities. The mass ratio of the four components T. Ca, REM, T. O, and S ((T. Ca+REM)/(T. O+S)) is at least 0.4.

公开(公告)号：IN11065DEN2014A

公开(公告)日：2015-09-25

申请号：IN11065DEN2014

申请日：2014-12-24

Applicant: JFE STEEL CORP

Inventor： MATSUI YUTAKA ,  YOSHIDA HIROMI ,  MATSUI AKITOSHI

IPC: G01N29/04

Abstract: A steel material quality evaluation device is provided with: a probe control unit (11) which scans a scan surface (S2) facing a mill scale surface (S1) of a steel material (1) including a surface layer portion by an ultrasonic signal and receives an echo signal from the steel material (1) the echo signal being generated with the scanning by the ultrasonic signal; a mill scale surface shape profile calculation unit (14) which calculates the propagation distance of the echo signal from the mill scale surface (S1) using waveform data relating to the echo signal and calculates the shape profile of the mill scale surface (S1) in the direction of the scanning by the ultrasonic signal from the calculated propagation distance; and a flaw indication imaging unit (15) and a flaw indication output unit (16) which set as a flaw detection gate the detection range of the echo signal resulting from a flaw in the steel material (1) on the basis of the shape profile of the mill scale surface (S1) and generates and outputs a flaw indication image in which the maximum value of the echo signal in the set flaw detection gate is mapped.

公开(公告)号：CA2715322C

公开(公告)日：2013-01-15

申请号：CA2715322

申请日：2009-03-03

Applicant: JFE STEEL CORP

Inventor： MATSUI AKITOSHI ,  UCHIDA YUICHI ,  KISHIMOTO YASUO ,  OGASAWARA FUTOSHI

IPC: C21C1/04 ,  C21C1/02 ,  C22B7/00 ,  C22B9/10 ,  F27B1/00

Abstract: In producing high-quality steel with use of copper-containing steel scraps as an iron source, the copper-containing steel scraps are melted with addition of carbon to produce hot metal for steelmaking, then, copper contained in the hot metal is removed by sulfur-containing flux, and sulfur contained in the hot metal is removed. With this method, the copper in the steel scraps can be removed efficiently and without the need for large facilities. Preferably, the sulfur-containing flux used is flux having Na2S as the main component. The treatment for removing copper in the hot metal is preferably carried out with use of refining equipment with mechanical stirrer or by the flux injecting method. Besides, it is preferable that a shaft furnace having a coke bed formed inside is used to produce hot metal having a higher concentration of sulfur for the copper removal treatment.