公开(公告)号：US5071471A

公开(公告)日：1991-12-10

申请号：US581688

申请日：1990-09-13

申请人： Yuji Miki ,  Hidenari Kitaoka ,  Shuji Takeuchi ,  Kenichi Sorimachi ,  Toshikazu Sakuraya

发明人： Yuji Miki ,  Hidenari Kitaoka ,  Shuji Takeuchi ,  Kenichi Sorimachi ,  Toshikazu Sakuraya

IPC分类号： B22D11/10 ,  B22D11/115 ,  B22D41/01 ,  B22D43/00 ,  C22B9/02

CPC分类号： C22B9/02 ,  Y02P10/234

摘要： A method of removing non-metallic inclusions from a molten metal comprises the step of simultaneously applying both a horizontal rotation of the molten metal and heating of the molten metal by induction heating. After the simultaneous application of rotational force and heat, the induction heating may be stopped while the horizontal flow of the molten metal is maintained, so as to promote the separation of the particles of the inclusions. The method is carried out by using an apparatus which has a vessel which contains the molten metal, a rotary magnetic field generating device surrounding the vessel, and an induction heating device also surrounding the vessel. Each of the rotary magnetic field generating device and the induction heating device may be divided into a plurality of circumferential segments and arranged such that the segments of both devices are alternately disposed around the vessel.

公开(公告)号：US5106411A

公开(公告)日：1992-04-21

申请号：US516209

申请日：1990-04-30

申请人： Yuji Miki ,  Hidenari Kitaoka ,  Tetsuya Fujii ,  Shuji Takeuchi ,  Kenichi Sorimachi ,  Toshikazu Sakuraya ,  Fumio Sudo

发明人： Yuji Miki ,  Hidenari Kitaoka ,  Tetsuya Fujii ,  Shuji Takeuchi ,  Kenichi Sorimachi ,  Toshikazu Sakuraya ,  Fumio Sudo

IPC分类号： C22B9/02

CPC分类号： C22B9/02 ,  Y02P10/234

摘要： A method of removing non-metallic inclusions from a molten metal by allowing the molten metal to pass through at least first and second vessels which are intermediate between a ladle and a mold. The molten metal is made to stay in the vessel for a period not shorter than 40 seconds while a horizontal rotation is imparted to the molten metal in the first vessel. The molten metal is then transferred from the first vessel to the second vessel. The molten metal in the second vessel is then heated. This method is suitably carried out by an apparatus comprising a first vessel having a discharge opening at its bottom and surrounded by a rotational magnetic field generating device for centrifugation of the molten metal in the first vessel, and a second vessel for receiving the molten metal discharged from the first vessel and provided with a heating device for heating the molten metal received therein.

公开(公告)号：US5356454A

公开(公告)日：1994-10-18

申请号：US98139

申请日：1993-07-28

申请人： Seiji Itoyama ,  Hidenari Kitaoka ,  Toshikazu Sakuraya ,  Kenichi Sorimachi ,  Saburo Moriwaki ,  Sumio Yamada ,  Chikashi Tada ,  Takahiro Mitumune ,  Shinichi Kaneko ,  Masafumi Maeda

发明人： Seiji Itoyama ,  Hidenari Kitaoka ,  Toshikazu Sakuraya ,  Kenichi Sorimachi ,  Saburo Moriwaki ,  Sumio Yamada ,  Chikashi Tada ,  Takahiro Mitumune ,  Shinichi Kaneko ,  Masafumi Maeda

IPC分类号： B22D11/111 ,  C21C7/076 ,  B22C1/00

CPC分类号： B22D11/111

摘要： A mold powder for use in continuous casting, containing specified amounts of CaO, Al.sub.2 O.sub.3, TiO.sub.2, Li.sub.2 O, BaO, MgO, F and Na.sub.2 O, and further containing at least one of BN and C as aggregate. The mold powder, when used in continuous casting of a steel rich in strong reducing metal elements such as Al, Ti, REM and so forth, remarkably suppresses generation of deterioration in the surface quality of the slab and break out of the slab which are attributable inferior lubrication.

摘要翻译： 一种用于连续铸造的模具粉末，含有规定量的CaO，Al 2 O 3，TiO 2，Li 2 O，BaO，MgO，F和Na 2 O，并且还含有BN和C中的至少一种作为骨料。 模具粉末，当用于连续铸造富含强还原性金属元素如Al，Ti，REM等的钢时，显着地抑制了板坯的表面质量的劣化和由于 润滑不良

公开(公告)号：US5429655A

公开(公告)日：1995-07-04

申请号：US952891

申请日：1992-11-20

申请人： Shigeru Ogura ,  Masayuki Onishi ,  Hidenari Kitaoka ,  Mitsuru Sakurai ,  Toshikazu Sakuraya ,  Yozo Tanino ,  Tsukasa Terashima ,  Yoshiro Tomiyama ,  Yuki Nabeshima ,  Yuji Miki ,  Saburo Moriwaki ,  Noboru Yasukawa

发明人： Shigeru Ogura ,  Masayuki Onishi ,  Hidenari Kitaoka ,  Mitsuru Sakurai ,  Toshikazu Sakuraya ,  Yozo Tanino ,  Tsukasa Terashima ,  Yoshiro Tomiyama ,  Yuki Nabeshima ,  Yuji Miki ,  Saburo Moriwaki ,  Noboru Yasukawa

IPC分类号： B22D11/10 ,  B22D11/11 ,  B22D11/114 ,  B22D41/005

CPC分类号： B22D11/114 ,  B22D11/11

摘要： An apparatus for removing non-metallic foreign matter in a molten steel includes a tundish and a coil device. The tundish is an intermediate container receiving the molten steel from a ladle and feeding a purified molten steel by removing the non-metallic foreign matter in the molten steel. For removing the non-metallic foreign matter, the tundish has a swirl flow bath and a floatation bath. In the circumference of the swirl flow bath of the tundish, a coil device is arranged for flowing the molten steel in the swirl flow bath in swirl fashion. The tundish and the coil device are formed separately and constructed for relative movement to each other. The molten steel in the swirl flow bath of the tundish is flown in swirl fashion in the horizontal direction by a magnetic field generated by the coil device. At this time, the molten steel forms a parabolic concaved surface. The non-metallic foreign matter in the molten steel is forcedly floated up on the parabolic surface portion of the molten steel, which is removed by an appropriate means. The molten steel thus purified flows into the floatation bath from the swirl flow bath. With the static flow in the floatation bath, the residual non-metallic foreign matter floats up. The purified molten steel is poured into the mold through the bottom of the floatation bath.

摘要翻译： PCT No.PCT / JP92 / 00388 Sec。 371日期：1992年11月20日 102（e）日期1992年11月20日PCT提交1992年3月27日PCT公布。 出版物WO92 / 17295 日期：1992年10月15日。用于除去钢水中的非金属异物的设备包括中间包和线圈装置。 中间包是从钢包中接收钢水的中间包，并且通过去除钢水中的非金属异物来送入精炼的钢水。 为了去除非金属异物，中间包具有旋流池和漂浮浴。 在中间包的涡流槽的圆周上，设置有一个线圈装置，用于以漩涡的方式使旋转流槽中的钢水流动。 中间包和线圈装置分别形成并相互相对移动构造。 在中间包的涡流槽中的钢水由螺旋装置产生的磁场沿水平方向旋转地流动。 此时，钢水形成抛物面凹面。 钢水中的非金属杂质被强制地悬浮在钢水的抛物面上，通过适当的方式去除。 这样净化的钢水从涡流浴流入浮选槽。 随着浮选槽中的静态流动，剩余的非金属异物浮起。 将纯化的钢水通过浮选槽的底部倒入模具中。

公开(公告)号：US5375648A

公开(公告)日：1994-12-27

申请号：US116138

申请日：1993-09-02

申请人： Akira Idogawa ,  Nagayasu Bessho ,  Kenichi Sorimachi ,  Tetsuya Fujii ,  Toshikazu Sakuraya

发明人： Akira Idogawa ,  Nagayasu Bessho ,  Kenichi Sorimachi ,  Tetsuya Fujii ,  Toshikazu Sakuraya

IPC分类号： B22D11/11 ,  B22D27/02

CPC分类号： B22D11/11

摘要： An apparatus and method for continuous casting steel. A vertical continuous-casting mold consists of a pair of long side frames and a pair of short side frames formed of a metal having low electrical conductivity. An immersion nozzle supplies molten steel to the mold. An induction heating coil surrounded by a backup frame surrounds the vertical continuous-casting mold. The induction heating coil induction-heats the surface of the molten steel and neighboring portions thereof. The apparatus meets the following conditions;.xi..sup.2 =.sigma..sub.1 /.sigma..sub.2 .ltoreq.4 1/10.ltoreq. .eta.=(2.mu. .sub.0 .multidot..sigma..sub.2 .multidot..omega.).sup.0.5 .multidot.d.ltoreq. 10where .xi. designates the ratio of electrical conductivity of the mold and the molten steel.sigma..sub.1 designates the electrical conductivity of the mold.sigma..sub.2 designates the electrical conductivity of the molten steel.mu..sub.0 designates the permeability in a vacuumd designates the thickness of the mold.omega. designates the pulsatance of the electromagnetic wave.eta. designates the ratio of the penetration depth of the magnetic field to the molten steel to the mold thickness.

摘要翻译： 连铸钢的设备和方法。 垂直连铸铸模由一对长边框架和一对由导电性低的金属构成的短边框架构成。 浸入式喷嘴将钢水提供给模具。 由支撑框架包围的感应加热线圈围绕垂直连铸铸模。 感应加热线圈感应加热钢水的表面及其相邻部分。 仪器符合以下条件; xi 2 = sigma 1 / sigma 2

公开(公告)号：US5083687A

公开(公告)日：1992-01-28

申请号：US598040

申请日：1990-10-16

申请人： Mitsuo Saito ,  Kenichi Sorimachi ,  Toshikazu Sakuraya

发明人： Mitsuo Saito ,  Kenichi Sorimachi ,  Toshikazu Sakuraya

IPC分类号： B22D41/54 ,  C04B35/583 ,  C04B35/66

CPC分类号： C04B35/6303 ,  B22D41/54 ,  C04B35/583 ,  C04B35/66 ,  C04B2235/3244 ,  C04B2235/3821 ,  C04B2235/3826 ,  C04B2235/386

摘要： A nozzle for use in continuous casting comprising an inner surface region defining the nozzle port for passing a molten steel, said inner surface region being formed from a mixture having a composition containing 50 to 80 wt % of boron nitride (BN) and 20 to 50 wt % of zirconium oxide (ZrO.sub.2), and a sintering assistant composed of silicon carbide (SiC) and boron carbide (B.sub.4 C) mixed at a weight ratio of 1:1, the sintering assistant being added in amount of 5 to 10 wt parts to 100 wt parts of said mixture. The nozzle is produced by a process comprising the steps of: forming a uniform mixture of fine particles of boron nitride (BN), zirconium oxide (ZrO.sub.2), silicon carbide (SiC) and boron carbide (B.sub.4 C); forming the mixture into a cylindrical blank; and fixing the cylindrical blank in the bore of a nozzle member by means of a joint filling material.

公开(公告)号：US4592778A

公开(公告)日：1986-06-03

申请号：US745922

申请日：1985-06-18

申请人： Tetsuya Fujii ,  Nobuo Harada ,  Shuji Takeuchi ,  Yoshiei Kato ,  Hideo Nakamura ,  Toshikazu Sakuraya ,  Yasuhiro Habu

发明人： Tetsuya Fujii ,  Nobuo Harada ,  Shuji Takeuchi ,  Yoshiei Kato ,  Hideo Nakamura ,  Toshikazu Sakuraya ,  Yasuhiro Habu

IPC分类号： C21C5/28 ,  C21C5/35 ,  C21C7/00

CPC分类号： C21C5/28 ,  C21C5/35

摘要： A process for producing an extremely low carbon steel in a top- and bottom-blown converter. The process is characterized in top-blowing a mixed gas of oxygen gas and an inert gas onto a molten steel in the top- and bottom-blown converter. The mixed gas is blown through a top-blowing lance at the final decarburization stage, while a gas (selected from a group consisting of an inert gas, oxygen gas and a mixture of oxygen and an inert gas) is bottom-blown into the molten steel in the converter.

摘要翻译： 一种用于在顶吹和底吹转炉中生产极低碳钢的方法。 该方法的特征在于将顶部和底部吹制转炉中的氧气和惰性气体的混合气体顶吹到钢水上。 在最终脱碳阶段，通过顶吹喷枪吹入混合气体，同时将气体（选自惰性气体，氧气和氧气和惰性气体的混合物）从底部吹入熔融 钢在转炉。

公开(公告)号：US06336967B1

公开(公告)日：2002-01-08

申请号：US09047411

申请日：1998-03-25

申请人： Hisahiro Matsunaga ,  Masato Kumagai ,  Hiroyuki Tobo ,  Yasuo Kishimoto ,  Toshikazu Sakuraya

发明人： Hisahiro Matsunaga ,  Masato Kumagai ,  Hiroyuki Tobo ,  Yasuo Kishimoto ,  Toshikazu Sakuraya

IPC分类号： C04B1814

CPC分类号： C22B7/006 ,  C22B5/08 ,  C22B7/04 ,  C22B34/32 ,  Y02P10/234

摘要： A method of rapidly reducing chromium oxide-containing slag and the like in large quantities, in a simplified manner and without requiring high temperatures. Chromium oxides are reduced with at least one of elementary sulfur and compounds of sulfur having a valence less than 6. For an aqueous solution of the sulfur component, desirably, its sulfur content is more than 0.03% by weight. As the sulfur source, preferred is blast furnace slag (e.g., non-aged, gradually-cooled blast furnace slag) that is discharged in large quantities in the iron industry. Cr6+ in chromium oxides is reduced in one of the following ways: (a) Chromium oxide-containing substances are sprayed with or immersed in blast furnace slag-released water that has been used in cooling blast furnace slag. (b) Chromium oxide-containing substances are mixed with blast furnace slag, and then kept in an air atmosphere. Optionally, the mixture is sprayed with blast furnace slag-released water. (c) Chromium oxide-containing substances are mixed with blast furnace slag, and then steamed. (d) Prior to the reduction treatment, chromium oxide-containing substances are preferably steamed. 100 parts by weight of reduced chromium oxide-containing compounds are mixed with from 0.1 to 90 parts by weight of sulfur-containing slag, and used in various civil engineering works.

摘要翻译： 以简化的方式大量快速还原含铬氧化物的炉渣等的方法，而不需要高温。 氧化铬与元素硫和价态小于6的硫化合物中的至少一种一起还原。对于硫成分的水溶液，理想的是其硫含量大于0.03重量％。 作为硫源，优选在铁工业中大量排放的高炉矿渣（例如，未老化，逐渐冷却的高炉渣）。 铬氧化物中的Cr6 +以下列方式之一进行还原：（a）将含氧化铬的物质喷洒或浸入已用于冷却高炉矿渣的高炉排渣水中。 （b）将含氧化铬的物质与高炉矿渣混合，然后保存在空气中。 任选地，混合物用高炉渣释放的水喷洒。 （c）将含氧化铬的物质与高炉矿渣混合，然后蒸。 （d）在还原处理之前，优选蒸去含氧化铬的物质。 将100重量份的含还原氧化铬的化合物与0.1至90重量份的含硫渣混合，并用于各种土木工程中。

公开(公告)号：US5221326A

公开(公告)日：1993-06-22

申请号：US700605

申请日：1991-05-15

申请人： Koji Yamaguchi ,  Yasuo Kishimoto ,  Toshikazu Sakuraya ,  Masaru Washio ,  Kazuhisa Hamagami ,  Hiroshi Nishikawa

发明人： Koji Yamaguchi ,  Yasuo Kishimoto ,  Toshikazu Sakuraya ,  Masaru Washio ,  Kazuhisa Hamagami ,  Hiroshi Nishikawa

IPC分类号： C21C7/10

CPC分类号： C21C7/10

摘要： A method of producing an ultra-low-carbon steel by conducting vacuum-decarburization of a molten steel by means of a vacuum degasifier of the type having recirculation pipes and a vacuum chamber. When the carbon content of the molten steel has come down to a level of 50 ppm or less, hydrogen gas is introduced together with an inert gas into the molten steel either by directly injecting a hydrogen-containing gas into the molten steel in the vacuum chamber through a tuyere provided in the wall of the vacuum chamber or by blowing the hydrogen-containing gas onto the surface of the molten steel in the vacuum chamber through a lance provided in the vacuum chamber. In order to enhance the effect produced by the method of the present invention, it is possible to take an additional measure such as blowing of hydrogen gas through a tuyere provided in the wall of the recirculation pipe or injection of hydrogen or hydrogen-containing gas through an injection lance immersed in the molten steel held in, a ladle.

公开(公告)号：US4596600A

公开(公告)日：1986-06-24

申请号：US771212

申请日：1985-08-30

申请人： Tetsuya Fujii ,  Toshikazu Sakuraya ,  Hideo Nakamura ,  Yasuhiro Habu ,  Takuo Imai

发明人： Tetsuya Fujii ,  Toshikazu Sakuraya ,  Hideo Nakamura ,  Yasuhiro Habu ,  Takuo Imai

IPC分类号： C21C5/34 ,  C21C5/35 ,  C21C5/38 ,  C21C7/10

CPC分类号： C21C5/35 ,  C21C5/38

摘要： A steel-making process in a converter, which includes using a carbon monoxide gas as an agitating gas supplied from a position lower than molten metal bath level.

摘要翻译： 一种转炉中的炼钢工艺，包括使用一氧化碳气体作为从低于熔融金属液面的位置供给的搅拌气体。