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公开(公告)号：US20220324017A1
公开(公告)日：2022-10-13
申请号：US17639848
申请日：2020-09-17
发明人： Shinichi FUKUNAGA , Takuya OKADA , Toshio KAKU , Hiroki FURUKAWA
摘要： A tundish upper nozzle structure and a continuous casting method make it possible to cause inclusions to float within a tundish. A flange-shaped member having an outside dimension greater than that of an upper end of a tundish upper nozzle is provided along a part or the entirety of the circumference of the upper end of the tundish upper nozzle, and one or more gas discharge holes are provided in one or more of the following surfaces: a lower surface, an outer peripheral surface and a top surface of the flange-shaped member, and a region of an outer peripheral surface of the tundish upper nozzle below the flange-shaped member. A length in the tundish upper nozzle structure is adjusted to cause almost all gas to float upwardly, or to adjust the flow rate of gas flowing downwardly toward the inner bore of the tundish upper nozzle, and the flow rate of gas floating upwardly.
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公开(公告)号：US20220134420A1
公开(公告)日：2022-05-05
申请号：US17424301
申请日：2020-01-15
IPC分类号： B22D41/50
摘要： It is intended to provide a flat immersion nozzle capable of stabilizing a molten steel discharge flow to stabilize an in-mold bath surface, i.e., reduce the fluctuation of the in-mold bath surface. Provided is an immersion nozzle having a flat portion whose inner bore has a thickness and a width greater than the thickness, wherein two lateral protrusions each protruding in a thickness direction are provided on each of opposed walls of the flat portion extending in a width direction. The lateral protrusions are arranged at axial symmetrical positions with respect to a longitudinal central axis of the width-directionally extending walls, in pairs, such that each of them extends obliquely downwardly in the width direction, wherein two pairs of the lateral protrusions are arranged, respectively, on the opposed width-directionally extending walls, in opposed relation.
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公开(公告)号：US11235384B2
公开(公告)日：2022-02-01
申请号：US16475174
申请日：2017-12-08
发明人： Shinichi Fukunaga , Kouji Kawarada , Kohei Tani , Masashi Oikawa
摘要： In a sliding nozzle comprising three plates consisting of an upper plate, an intermediate plate capable of a sliding movement, and a lower plate, it is intended to suppress adhesion and deposition of metal oxides and others on wall surfaces of inner bores of the three plates. The intermediate plate has: a first inclined portion whose surface defines a slidingly closing directional leading-side wall surface of an inner bore thereof and extends obliquely downwardly in a diametrically contracting direction; a second inclined portion whose surface defines an upper part of a slidingly closing directional trailing-side wall surface of the inner bore thereof and extends obliquely downwardly in a diametrically contracting direction, and a third inclined portion whose surface defines a lower part of the slidingly closing directional trailing-side wall surface of the inner bore thereof and extends obliquely downwardly in a diametrically expanding direction.
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公开(公告)号：US20210001398A1
公开(公告)日：2021-01-07
申请号：US16978270
申请日：2019-02-13
发明人： Kouji KAWARADA , Kouichi TACHIKAWA
IPC分类号： B22D41/56
摘要： Provided is a sealing block installation structure capable of preventing the occurrence of a gap between a nozzle or plug installed in a bottom portion of a molten metal vessel and a plate or the like located on the lower side of the nozzle or plug, and a gap between the nozzle or plug and a sealing block located on the upper side of or on the outer peripheral side of the nozzle or plug. In the seating block installation structure, a seating block 2 disposed to surround a nozzle for discharging therethrough molten metal downwardly from the bottom portion of the molten metal vessel or a plug is fixed to a shell of the bottom portion of the molten metal vessel by a connecting member 3.
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公开(公告)号：US10799950B2
公开(公告)日：2020-10-13
申请号：US16070934
申请日：2016-11-09
摘要： A nozzle structure for discharging molten steel with improved sealing performance. The nozzle structure comprises: a molten steel discharge path having an inner bore; and one or more joints through which the molten steel discharge path is divided at one or more positions in a orthogonal direction with respect to an upward-downward direction of discharge of molten steel, and which join the molten steel discharge path. An inner bore sleeve is formed of a refractory material, and provided on an inner bore surface of the nozzle structure to extend in the upward-downward direction across at least one of the joints.
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公开(公告)号：US10125051B2
公开(公告)日：2018-11-13
申请号：US15566818
申请日：2016-04-01
发明人： Jun Sugawara
IPC分类号： C04B35/195
摘要： A cordierite-based sintered body comprises cordierite as a primary crystal phase and LaMgAl11O19 as a secondary crystal phase, wherein a ratio ILMA (114)/IMAS (004) is in the range of 0.01 to 0.8, where the ILMA (114) denotes a peak intensity of a (114) plane of LaMgAl11O19 as measured by powder X-ray diffractometry, and the IMAS (004) denotes a peak intensity of a (004) plane of cordierite as measured by powder X-ray diffractometry. The disclosure is intended to enhance mechanical property and improve complex and fine processability for a cordierite-based sintered body without compromising low thermal expansibility, high dimensional long-term stability, high stiffness (high elastic modulus) and precision polishing characteristic.
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公开(公告)号：US09821371B2
公开(公告)日：2017-11-21
申请号：US14777909
申请日：2014-03-19
发明人： Katsumi Morikawa , Akinari Sasaki , Taro Makino , Ling Li
IPC分类号： B22D41/08 , B22D41/54 , C04B35/01 , C04B35/043 , C04B35/106 , C04B35/482
CPC分类号： B22D41/54 , C04B35/013 , C04B35/043 , C04B35/0435 , C04B35/106 , C04B35/482 , C04B2235/3206 , C04B2235/3217 , C04B2235/3225 , C04B2235/3232 , C04B2235/3244 , C04B2235/34 , C04B2235/3409 , C04B2235/3418 , C04B2235/3821 , C04B2235/3826 , C04B2235/401 , C04B2235/402 , C04B2235/422 , C04B2235/425 , C04B2235/428 , C04B2235/5427 , C04B2235/5436 , C04B2235/5445 , C04B2235/5472 , C04B2235/72 , C04B2235/9607
摘要： A refractory material contains: 40 mass % or more of MgO; 4 to 30 mass % of a free carbon component; and one or more of B2O3, P2O5, SiO2 and TiO2, in a total amount of 0.3 to 3 mass %, with the remainder being at least one other type of additional refractory component. A void layer exists in an interface between a carbon-containing matrix microstructure residing at least on opposite sides of a maximum-size one of a plurality of MgO-containing particles in the refractory material, and the maximum-size MgO-containing particle. A sum of respective thicknesses of the void layer at two positions on the opposite sides is 0.2 to 3.0% of a ratio with respect to particle size of the maximum-size MgO-containing particle. An inorganic compound of MgO and the one or more of B2O3, P2O5, SiO2 and TiO2 exists entirety or partially in a surface of each of the MgO-containing particles.
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公开(公告)号：US09718128B2
公开(公告)日：2017-08-01
申请号：US14414208
申请日：2012-12-12
发明人： Arito Mizobe , Kento Furukawa , Tetsuo Tsuduki , Masaki Yamamoto , Joji Kurisu
摘要： With a view to adding, to an upper nozzle formed with a bore having a shape capable of creating a less energy loss or smooth (constant) molten steel flow to suppress the occurrence of adhesion of inclusions and metals in molten steel, a gas injection function to thereby further suppress the occurrence of the adhesion, the present invention provides a method of using an upper nozzle configured to have a cross-sectional shape of a wall surface defining the bore, taken along an axis of the bore, comprising a curve represented by the following formula: log(r (z))=(1/n)×log((H+L)/(H+z))+log(r (L)) (n=1.5 to 6), where: L is a length of the upper nozzle; H is a calculational hydrostatic head height; and r (z) is an inner radius of the bore at a position downwardly away from an upper edge of the bore by a distance z. The method comprises using the upper nozzle in such a manner as to satisfy the following relationship: RG≦4.3×VL, where RG is a gas rate defined as a volume ratio of a flow rate QG (Nl/s) of injection gas to a flow rate QL (l/s) of molten steel flowing through the bore (RG=(QG/QL)×100(%)), and VL is a flow speed of the molten steel at a lower edge of the upper nozzle.
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公开(公告)号：US20150196954A1
公开(公告)日：2015-07-16
申请号：US14414208
申请日：2012-12-12
发明人： Arito Mizobe , Kento Furukawa , Tetsuo Tsuduki , Masaki Yamamoto , Joji Kurisu
摘要： With a view to adding, to an upper nozzle formed with a bore having a shape capable of creating a less energy loss or smooth (constant) molten steel flow to suppress the occurrence of adhesion of inclusions and metals in molten steel, a gas injection function to thereby further suppress the occurrence of the adhesion, the present invention provides a method of using an upper nozzle configured to have a cross-sectional shape of a wall surface defining the bore, taken along an axis of the bore, comprising a curve represented by the following formula: log(r (z))=(1/n)×log((H+L)/(H+z))+log(r (L)) (n=1.5 to 6), where: L is a length of the upper nozzle; H is a calculational hydrostatic head height; and r (z) is an inner radius of the bore at a position downwardly away from an upper edge of the bore by a distance z. The method comprises using the upper nozzle in such a manner as to satisfy the following relationship: RG≦4.3×VL, where RG is a gas rate defined as a volume ratio of a flow rate QG (Nl/s) of injection gas to a flow rate QL (l/s) of molten steel flowing through the bore (RG=(QG/QL)×100(%)), and VL is a flow speed of the molten steel at a lower edge of the upper nozzle.
摘要翻译： 为了向形成有具有能够产生较少能量损失或平滑（恒定）钢水流的形状的孔的上部喷嘴添加，以抑制钢水中夹杂物和金属粘附的发生，气体注入功能 从而进一步抑制粘附的发生，本发明提供了一种使用上部喷嘴的方法，所述上部喷嘴被构造成具有沿孔的轴线截取的限定孔的壁表面的横截面形状，包括由 log（r（z））=（1 / n）×log（（H + L）/（H + z））+ log（r（L））（n = 1.5〜6） L是上喷嘴的长度; H是计算静压头高度; 并且r（z）是在距离孔的上边缘向下远离距离z的位置处的孔的内半径。 该方法包括以满足以下关系式的方式使用上喷嘴：RG＆nlE; 4.3×VL，其中RG是气体速率，其定义为喷射气体的流量QG（Nl / s）的体积比 流过孔的钢水的流量QL（l / s）（RG =（QG / QL）×100（％）），VL是上喷嘴下边缘的钢水的流速。
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公开(公告)号：US20140263483A1
公开(公告)日：2014-09-18
申请号：US14007512
申请日：2012-03-23
申请人： Junichi Funato , Shunji Sadano
发明人： Junichi Funato , Shunji Sadano
IPC分类号： B22D41/34
CPC分类号： B22D41/34
摘要： Provided is a plate fixing structure which is usable in a concavo-convex fitting technique for fitting with respect to a fitting concave or convex portion provided in a plate-receiving metal frame, and capable of easily achieving an alignment between the fitting convex portion and the fitting concave portion, and a plate for use with the fixing structure. The plate 10 is provided with a first engagement portion 14 extending from one of opposite ends thereof in a sliding direction thereof, and a second engagement portion extending from the other end, and the plate-receiving metal frame 20 is provided with a first support portion 22 and a second support portion 23 each configured to allow a respective one of the first engagement portion 14 and the second engagement portion 15 to be engaged therewith. When the first engagement portion 14 is engaged with and supported by the first support portion 22, the fitting concave portion 16 of the plate and the fitting convex portion 21 of the plate-receiving metal frame positionally conform to each other in the sliding direction of the plate. Then, when the second engagement portion 15 is engaged with the second support portion 23, the fitting concave portion 16 and the fitting convex portion 21 positionally conform to each other in a direction perpendicular to the sliding direction of the plate.
摘要翻译： 提供一种板固定结构，其可用于相对于设置在板接收金属框架中的嵌合凹部或凸部进行嵌合的凹凸配合技术，并且能够容易地实现嵌合凸部与嵌合凸部之间的对准 嵌合凹部，以及与该固定结构一起使用的板。 板10设置有从其滑动方向的相对端中的一个延伸的第一接合部分14和从另一端延伸的第二接合部分，并且板接收金属框架20设置有第一支撑部分 22和第二支撑部23，每个被配置为允许第一接合部14和第二接合部15中的相应一个与其接合。 当第一接合部14与第一支撑部22接合并被其支撑时，板的嵌合凹部16和板接收金属框的嵌合凸部21在滑动方向上彼此位置一致 盘子。 然后，当第二接合部15与第二支撑部23接合时，嵌合凹部16和嵌合凸部21在与板的滑动方向垂直的方向上彼此成位。
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