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1. 发明授权

US06375701B1 Method of judging slag forming state in electric furnace steel production and method of operating electric furnace 失效
标题翻译：判定电炉钢生产中的成渣状态及电炉操作方法
公开(公告)号：US06375701B1
公开(公告)日：2002-04-23
申请号：US09445960
申请日：1999-12-16
申请人： Katsutoshi Yamashita , Arata Ueda , Toyohito Nakahara
发明人： Katsutoshi Yamashita , Arata Ueda , Toyohito Nakahara
IPC分类号： C21B1312
CPC分类号： C21C5/5229 , C21C5/4673 , C21C5/52 , C21C5/5211 , C21C5/54 , C21C2005/5288 , C21C2300/02 , F27B3/065 , F27B3/085 , F27B3/10 , F27B3/28 , F27D3/1545 , F27D17/008 , F27D19/00 , F27D2019/0015 , Y02P10/216
摘要： The state of slag foaming generated in an electric furnace steel manufacture is judged by measuring the NOx amount in exhaust gas. The foaming state is adjusted to completely interrupt the contact of melted steel with air so that low nitrogen of the steel is always achieved or reduction of electric power consumption rate is achieved. Thus, in the manufacture of steel by subjecting iron scrap to dissolving, refining and heating stages successively in an electric arc furnace, the NOx amount in the exhaust gas is measured at the refining and heating stages of the melted steel and then the state of the slag foaming is judged depending upon the measured data.
摘要翻译：通过测量排气中的NOx量来判断在电炉钢制造中产生的炉渣起泡状态。调整发泡状态以完全中断熔融钢与空气的接触，从而始终实现钢的低氮，或降低电力消耗率。因此，在通过在电弧炉中连续地对废铁进行溶解，精炼和加热阶段的钢的制造中，在熔融钢的精炼和加热阶段测量废气中的NOx量，然后在根据测量数据判断炉渣发泡。

2. 发明授权

US4452634A Method of stirring molten metal and refractory cylinder for the purpose 失效
$Method of stirring molten metal and refractory cylinder for the purpose$
标题翻译：用于搅拌熔融金属和耐火材料缸的方法
公开(公告)号：US4452634A
公开(公告)日：1984-06-05
申请号：US437514
申请日：1982-10-29
申请人： Yukio Oguchi , Norio Sumida , Tetsuya Fujii , Toshihiko Emi , Toshio Fujimura , Arata Ueda
发明人： Yukio Oguchi , Norio Sumida , Tetsuya Fujii , Toshihiko Emi , Toshio Fujimura , Arata Ueda
IPC分类号： B01F5/10 , B01F11/00 , C21C7/00 , C21C7/10 , C22B9/02 , C22B21/00 , F27D27/00 , C22B9/00
CPC分类号： F27D27/00 , B01F11/0071 , B01F11/0074 , B01F5/10 , C21C7/0037 , C21C7/10 , C22B21/0084 , C22B9/02 , F27D27/007 , Y02P10/234
摘要： A method of stirring molten metal by repeatedly sucking and rapidly discharging part of the molten metal into and out of a refractory cylinder having a lower opening end immersed in the molten metal in a ladle, comprises operating the stirring under a condition that an inner diameter (d) of the refractory cylinder is less than 1,000 mm, a relation between the inner diameter (d, mm) of the refractory cylinder and weight (W, ton) of the molten metal in the ladle is d/W.sup.0.5 >30, and an immersed depth of the refractory cylinder is within 200-700 mm. A pressurized gas for discharging the sucked molten metal out of the cylinder is introduced thereinto in an inclined direction relative to a vertical line against a point on an opposite inner wall of the cylinder at least 500 mm above the maximum suction level of the molten metal in the cylinder.A refractory cylinder operated in the above manner according to the invention comprises a flange connection between an uppermost and an intermediate cylinder parts of the cylinder at a location higher than the maximum suction height of the molten metal and a further flange connection between the intermediate cylinder part and a lowermost cylinder part. The refractory cylinder comprises at its immersed end a flow restricting opening to obtain more strong stirring the molten metal.
摘要翻译：通过将熔融金属的一部分反复吸入并快速排出浸入熔融金属中的较低开口端的耐火圆筒放入钢包中来搅拌熔融金属的方法包括在内径（耐火材料圆筒的d）小于1000mm，钢包中熔融金属的重量（W，ton）之间的关系为d / W0.5> 30，耐火材料缸的浸入深度在200-700mm之内。用于将吸出的熔融金属从气缸中排出的加压气体相对于垂直线倾斜的方向被引入到相对于气缸的相对的内壁上的点上方的熔融金属的最大吸入水平以上至少500mm 气瓶。按照本发明以上述方式操作的耐火材料圆筒包括在高于熔融金属的最大吸入高度的位置处的气缸的最上部和中间气缸部分之间的凸缘连接，以及中间气缸部分和最下面的气缸部分。耐火材料缸在其浸入端包括流动限制开口以获得更强烈的搅拌熔融金属。

3. 发明授权

US4427444A Method of refining molten metal with stirring by repeated operation of suction and discharge 失效
标题翻译：通过反复操作抽吸和排出，搅拌精炼熔融金属的方法
公开(公告)号：US4427444A
公开(公告)日：1984-01-24
申请号：US437513
申请日：1982-10-29
申请人： Norio Sumida , Yukio Oguchi , Tetsuya Fujii , Toshihiko Emi , Toshio Fujimura , Arata Ueda , Kenichi Orito
发明人： Norio Sumida , Yukio Oguchi , Tetsuya Fujii , Toshihiko Emi , Toshio Fujimura , Arata Ueda , Kenichi Orito
IPC分类号： C21C7/00 , C21C7/10 , C22B9/02 , F27D27/00 , C22B9/00
CPC分类号： F27D27/00 , C21C7/0081 , C21C7/10 , C22B9/02 , F27D27/007 , Y02P10/234
摘要： A method of refining molten metal with stirring in a refining vessel by repeated operation of suction and discharge is disclosed, wherein a lower end of a refractory cylinder is immersed into a molten metal bath in the vessel and an inside of the cylinder opposite to the immersed end is alternately subjected to evacuation and pressurization. In this method, maximum and average values of pressure reduction velocity to be applied to the inside of the cylinder are limited to not more than 1,000 mmHg/sec and not more than 500 mmHg/sec, respectively, and an evacuation time is extended over at least 1.5 times intrinsic oscillation period of up and down movement of molten metal column inside the cylinder.
摘要翻译：公开了一种通过重复操作抽吸和排出在精炼容器中搅拌精炼熔融金属的方法，其中将耐火材料圆筒的下端浸入容器中的熔融金属浴中，并且将缸体的内部浸入与浸没交替地进行抽真空和加压。在该方法中，施加到气缸内部的减压速度的最大值和平均值分别限制在不大于1000mmHg / sec且不大于500mmHg / sec，并且排空时间延长到至少1.5倍内圆柱体内熔融金属柱上下运动的固有振荡周期。

4. 发明授权

US5853659A Steel, steel sheet having excellent workability and method of producing the same by electric furnace-vacuum degassing process 失效
标题翻译：具有优异的加工性的钢板，通过电炉 - 真空脱气工艺制造该钢板的方法
公开(公告)号：US5853659A
公开(公告)日：1998-12-29
申请号：US806765
申请日：1997-02-26
申请人： Takashi Sekita , Taro Yahiro , Saiji Matsuoka , Toshio Fujimura , Takemi Yamamoto , Masahiko Morita , Osamu Furukimi , Arata Ueda
发明人： Takashi Sekita , Taro Yahiro , Saiji Matsuoka , Toshio Fujimura , Takemi Yamamoto , Masahiko Morita , Osamu Furukimi , Arata Ueda
IPC分类号： C21C7/10 , C21D8/04 , C22C38/00 , C22C38/12 , C22C38/14 , C21C5/52 , C21D8/02 , C22C38/08
CPC分类号： C22C38/004 , C21D8/041 , C22C38/001 , C22C38/002 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/60 , C21C7/10 , C21D8/0426 , C21D8/0436 , Y02P10/216
摘要： Steel having excellent workability and deep drawability is produced by an electric furnace-vacuum degassing process. The steel has a composition which comprises about: C: 0.0050 wt % or less Si: 1.5 wt % or less Mn: 1.5 wt % or less P: 0.10 wt % or less Al: 0.10 wt % or less S: 0.020 wt % or less O: 0.01 wt % or less Cu: 0.02-1.5 wt % Ni: 0.02-2.0 wt % Ti and/or Nb: from 0.001 to 0.10 wt % N: from 0.0040 to 0.0090 wt %.
摘要翻译：通过电炉 - 真空脱气工艺制造具有优异的可加工性和深冲性的钢。钢的组成为：C：0.0050重量％以下Si：1.5重量％以下Mn：1.5重量％以下P：0.10重量％以下Al：0.10重量％以下S：0.020重量％少量O：0.01重量％以下Cu：0.02〜1.5重量％Ni：0.02〜2.0重量％Ti和/或Nb：0.001〜0.10重量％N：0.0040〜0.0090重量％。

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