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公开(公告)号：US4508571A
公开(公告)日：1985-04-02
申请号：US591030
申请日：1984-03-19
申请人： Hakaru Nakato , Toshikazu Sakuraya , Yasuhiro Habu , Toshihiko Emi , Masanori Kodama , Takao Koshikawa , Yoshimitsu Yoshida , Fumitaka Shimokawa
发明人： Hakaru Nakato , Toshikazu Sakuraya , Yasuhiro Habu , Toshihiko Emi , Masanori Kodama , Takao Koshikawa , Yoshimitsu Yoshida , Fumitaka Shimokawa
IPC分类号： C21C1/00 , B22D11/10 , B22D11/108 , B22D11/111 , B28B7/34
CPC分类号： B22D11/111
摘要： A mold additive for use in the continuous casting is disclosed, which comprises a base material for slag having a chemical composition of CaO--SiO.sub.2 --Al.sub.2 O.sub.3 system, a flux and a carbonaceous aggregate. The mold additive contains 0.5-2.0% by weight of carbon black and 1-4% by weight of activated carbon with an average particle size of not more than 10 .mu.m as the carbonaceous aggregate, and has a bulk density of not more than 0.9 g/cm.sup.3.
摘要翻译： 公开了一种用于连续铸造的模具添加剂，其包括具有化学组成为CaO-SiO 2 -Al 2 O 3体系的渣的基料，助熔剂和碳质聚集体。 模具添加剂含有0.5-2.0重量％的炭黑和1-4重量％的作为碳质骨料的平均粒度不超过10微米的活性炭，并且堆积密度不大于0.9 g / cm3。
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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
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。
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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
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。
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公开(公告)号：US4436287A
公开(公告)日：1984-03-13
申请号：US511511
申请日：1983-07-06
摘要： Wear of tuyeres for refining a molten iron is prevented by blowing a CO-containing gas having the defined flow amount, oxygen gas flow amount and CO gas concentration as a shrouding gas which surrounds a core refining gas flow containing oxygen gas through tuyeres of concentric pipes. As the shrouding gas for cooling and protecting the tuyeres, use may be made of an exhaust gas discharged and recovered from a converter or a blast furnace by controlling the concentrations of CO and N.sub.2 in the exhaust gas to the specific limitations.
摘要翻译： 通过将具有规定流量，氧气流量和CO气体浓度的含CO气体作为围绕通过含有氧气的核心精炼气流的覆盖气体吹入通过同心管的风口来防止风口的磨损 。 作为用于冷却和保护风口的遮蔽气体，可以通过将废气中的CO和N 2的浓度控制在特定的限制条件下，使用从转炉或高炉中排出和回收的废气。
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5.发明授权Method of and apparatus for removing non-metallic inclusions from molten metal 失效用于从金属金属中去除非金属包合物的方法和装置
公开(公告)号：US5071471A
公开(公告)日：1991-12-10
申请号：US581688
申请日：1990-09-13
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.
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6.发明授权公开(公告)号：US06336967B1
公开(公告)日：2002-01-08
申请号：US09047411
申请日：1998-03-25
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。
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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.
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公开(公告)号：US06521040B2
公开(公告)日：2003-02-18
申请号：US09984038
申请日：2001-10-26
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.
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公开(公告)号：US5375648A
公开(公告)日：1994-12-27
申请号：US116138
申请日：1993-09-02
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
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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
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