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1. 发明授权

US5017220A Method for smelting reduction of Ni ore 失效
公开(公告)号：US5017220A
公开(公告)日：1991-05-21
申请号：US473338
申请日：1990-02-01
申请人： Haruyoshi Tanabe , Katsuhiro Iwasaki , Masahiro Kawakami , Chihiro Taki , Toshio Takaoka
发明人： Haruyoshi Tanabe , Katsuhiro Iwasaki , Masahiro Kawakami , Chihiro Taki , Toshio Takaoka
IPC分类号： C21B13/00 , C21C5/00 , C22B23/02
CPC分类号： C21B13/0013 , C21C5/005 , C22B23/02 , Y02P10/136
摘要： A method for smelting reduction of Ni ore comprises charging Ni ore, carbonaceous material and flux into a converter type smelting reduction furnace holding molten iron therein and controlling a post-combustion ratio [(H.sub.2 O+CO.sub.2)/(H.sub.2 +H.sub.2 O+CO+CO.sub.2)] inside the smelting reduction furnace at 0.3 or more by blowing oxygen from a top-blow oxygen lance and stirring gas from a bottom-blow tuyere arranged in the bottom of the smelting reduction furnace into the smelting reduction furnace.A relation between a content of carbon [C] (%) in molten metal and an amount of slag produced per ton of molten metal is represented with a formula:[C].gtoreq.S(T/HMT)/3

2. 发明授权

US5039480A Method for manufacturing molten metal containing Ni and Cr 失效
标题翻译：含有Ni和Cr的熔融金属的制造方法
公开(公告)号：US5039480A
公开(公告)日：1991-08-13
申请号：US475675
申请日：1990-02-06
申请人： Haruyoshi Tanabe , Chihiro Taki , Katsuhiro Iwasaki , Masahiro Kawakami , Toshio Takaoka
发明人： Haruyoshi Tanabe , Chihiro Taki , Katsuhiro Iwasaki , Masahiro Kawakami , Toshio Takaoka
IPC分类号： C21B13/00 , C21C5/00 , C21C7/068 , C22C33/04
CPC分类号： C22C33/04 , C21B13/0006 , C21C5/005 , C21C7/0685 , Y02P10/136
摘要： A method for manufacturing molten metal containing Ni and Cr comprises a process of smelting and reducing Ni ore, and a process of smelting and reducing Cr ore.The process of smelting and reducing Ni ore comprises the steps of charging molten iron into a smelting reduction furnace having a top-blow oxygen lance and tuyeres for blowing stirring gas, charging Ni ore, carbonaceous material and flux into the smelting reduction furnace, blowing decarbonization oxygen and post-combustion oxygen from the top-blow oxygen lance into the smelting reduction furnace, blowing stirring gas for stirring the molten metal and slag inside the smelting reduction furnace from the tuyeres, and controlling post-combustion ratio [(H.sub.2 O+CO.sub.2)/(H.sub.2 +H.sub.2 O+CO+CO.sub.2)] at 0.3 or more.The process of smelting and reducing said Cr ore comprises charging Cr ore, carbonaceous material and flux into the smelting reduction furnace holding the molten metal containing Ni, blowing decarbonization oxygen and post-combustion oxygen from the top-blow oxygen lance into the smelting reduction furnace, blowing stirring gas for stirring the molten metal and slag inside the smelting reduction furnace from the tuyeres, and controlling post-combustion ratio [(H.sub.2 O+CO.sub.2)/(H.sub.2 +H.sub.2 O+CO+CO.sub.2)] at 0.3 or more.

3. 发明授权

US5047082A Method for smelting reduction of Ni ore 失效
标题翻译：镍矿冶炼还原方法
公开(公告)号：US5047082A
公开(公告)日：1991-09-10
申请号：US460238
申请日：1990-01-02
申请人： Haruyoshi Tanabe , Katsuhiro Iwasaki , Masahiro Kawakami , Chihiro Taki , Toshio Takaoka
发明人： Haruyoshi Tanabe , Katsuhiro Iwasaki , Masahiro Kawakami , Chihiro Taki , Toshio Takaoka
IPC分类号： C21B5/00 , C21B13/00 , C22B23/00 , C22B23/02 , C22C33/04
CPC分类号： C21B5/001 , C21B13/0013 , C22B23/02
摘要： A method for smelting reduction of Ni ore comprises charging Ni ore and carbonaceous material into a converter type smelting reduction furnace having bottom-blow tuyeres and a top-blow lance, the smelting reduction furnace holding a molten metal, blowing oxygen gas from the top-blow lance and a stirring gas from the bottom-blow tuyeres into the furnace, and discharging slag so that a relation represented with a formulaVo>0.4 Ws+1.0can be satisfied, Vo (m.sup.3 per ton of molten metal) being a specific volume of the smelting reduction furnace per ton of molten metal and Ws (ton per ton of molten metal) being 2 specific weight of slag per ton of molten metal.

4. 发明授权

US5065985A Method for smelting reduction of iron ore and apparatus therefor 失效
标题翻译：用于减少铁矿石及其装置的方法
公开(公告)号：US5065985A
公开(公告)日：1991-11-19
申请号：US520785
申请日：1990-05-08
申请人： Kenji Takahashi , Katsuhiro Iwasaki , Shigeru Inoue , Haruyoshi Tanabe , Masahiro Kawakami , Kenzo Yamada , Osamu Terada
发明人： Kenji Takahashi , Katsuhiro Iwasaki , Shigeru Inoue , Haruyoshi Tanabe , Masahiro Kawakami , Kenzo Yamada , Osamu Terada
IPC分类号： C21B11/00 , C21B13/00 , C21B13/14 , C22B5/14 , F27B15/10 , F27B19/02 , F27B19/04
CPC分类号： C21B13/143 , Y02P10/136
摘要： An apparatus for a smelting reduction of iron ore comprising a preheat and prereduction furnace which preheats and prereduces iron ore, a smelting reduction furance into which said preheated and prereduced iron ore, carbonaceous material and fluxes are charged and in which said preheated and prereduced iron ore are smelted and reduced, a top blow oxygen lance having decarburizing nozzles and post-combustion nozzles and blowing oxygen into said smelting reduction furance, and at least one side tuyere placed at a side wall of the smelting reduction furnace and at least one bottom tuyere placed at a bottom of the smelting reduction furnace through which a stirring gas is respectively blown so that at least a part of said stirring gas introduced through said at least one side tuyere hits a swollen portion of the molten metal by said stirring gas introduced through said at least one bottom tuyere.

5. 发明授权

US5074530A Apparatus for smelting reduction of iron ore 失效
标题翻译：减少铁矿石的设备
公开(公告)号：US5074530A
公开(公告)日：1991-12-24
申请号：US599679
申请日：1990-10-17
申请人： Katsuhiro Iwasaki , Kenji Takahashi , Shigeru Inoue , Haruyoshi Tanabe , Masahiro Kawakami , Osamu Terada
发明人： Katsuhiro Iwasaki , Kenji Takahashi , Shigeru Inoue , Haruyoshi Tanabe , Masahiro Kawakami , Osamu Terada
IPC分类号： C21B13/14
CPC分类号： C21B13/14 , Y02P10/136
摘要： The invention provides an apparatus for smelting reduction of iron ore which contains (1) at least one preheat and prereduction furnace which preheats and prereduces iron ore to a prereduction degree of less than 30%; (2) a smelting reduction furnace into which the preheated and prereduced iron ore, carbonaceous material and flux are charged and in which the preheated and prereduced iron ore is reduced; and (3) a top blow oxygen lance having first nozzles for decarburization and second nozzles for post-combustion, oxygen gas being blown through the first nozzles and the second nozzles into the smelting reduction furnace. At least one side tuyere is placed in a side wall of the smelting reduction furnace and at least one bottom tuyere is placed in a bottom wall of the smelting reduction furnace for blowing a stirring gas through the at least one side tuyere and the at least one bottom tuyere into the smelting reduction furnace.

6. 发明授权

US4995906A Method for smelting reduction of iron ore 失效
公开(公告)号：US4995906A
公开(公告)日：1991-02-26
申请号：US283218
申请日：1988-12-12
申请人： Katsuhiro Iwasaki , Kenji Takahashi , Shigeru Inoue , Haruyoshi Tanabe , Masahiro Kawakami , Osamu Terada
发明人： Katsuhiro Iwasaki , Kenji Takahashi , Shigeru Inoue , Haruyoshi Tanabe , Masahiro Kawakami , Osamu Terada
IPC分类号： C21B13/14
CPC分类号： C21B13/14 , Y02P10/136
摘要： A method for smelting reduction of iron ore, comprises the steps of: introducing iron ore into a preheat and prereduction furnace and preheating and prereducing the iron ore, a prereduction degree being less than 30%; charging the iron ore, carbonaceous material and flux into a smelting reduction furnace; blowing oxygen gas, through decarburization nozzles and post-combustion nozzles placed in a top end of an oxygen lance, into the smelting reduction furnace, the top end of the oxygen lance being located so as to be between a top level and a bottom level of a slag layer; blowing a stirring gas through side tuyeres placed in a side wall and bottom tuyeres placed in a bottom wall of the smelting reduction furnace; and controlling a flow amount of the oxygen gas and the stirring gas so that an oxidation degree of an exhaust gas generated in the smelting reduction furnace ranges 0.4 to 0.9 and still a temperature of the exhaust gas ranges 300.degree. to 1300.degree. C. when the exhaust gas is introduced into the preheat and prereduction furnace. Furthermore, an apparatus for smelting reduction of iron ore comprises: a preheat and prereduction furnace; a smelting reduction furnace; a top blow oxygen lance with decarburization nozzles and post-combustion nozzles; side tuyeres and bottom tuyeres.

7. 发明授权

US4988079A Apparatus for smelting and reducing iron ores 失效
标题翻译：冶炼和还原铁矿石的设备
公开(公告)号：US4988079A
公开(公告)日：1991-01-29
申请号：US503805
申请日：1990-04-03
申请人： Kenji Takahashi , Katsuhiro Iwasaki , Shigeru Inoue , Haruyoshi Tanabe , Masahiro Kawakami , Kenzo Yamada , Ichiro Kikuchi
发明人： Kenji Takahashi , Katsuhiro Iwasaki , Shigeru Inoue , Haruyoshi Tanabe , Masahiro Kawakami , Kenzo Yamada , Ichiro Kikuchi
IPC分类号： C21B13/00 , C21B13/14
CPC分类号： C21B13/14 , C21B13/0006 , C21C5/305 , Y02P10/136 , Y02P10/265 , Y02P10/283 , Y10S75/958
摘要： An apparatus for smelting reduction comprising a preheat and prereduction furnace for preheating and prereducing iron ores; a smelting reduction furnace into which iron ores, carbonaceous material and fluxing material are charged and in which the iron ores are smelted and reduced; a top-blow oxygen lance through which oxygen gas is blown into the smelting reduction furnace, having decarbonizing nozzles and post combustion nozzles; and the smelting reduction furnace having bottom and side tuyeres built respectively in a side wall and a bottom thereof.

8. 发明授权

US4944799A Method of producing stainless molten steel by smelting reduction 失效
标题翻译：通过冶炼还原生产不锈钢的方法
公开(公告)号：US4944799A
公开(公告)日：1990-07-31
申请号：US362418
申请日：1989-04-25
申请人： Haruyoshi Tanabe , Masahiro Kawakami , Kenji Takahashi , Katsuhiro Iwasaki , Shigeru Inoue
发明人： Haruyoshi Tanabe , Masahiro Kawakami , Kenji Takahashi , Katsuhiro Iwasaki , Shigeru Inoue
IPC分类号： C21B13/00 , C21C5/00 , C21C5/35 , C21C7/068
CPC分类号： C21C5/005 , C21B13/0006 , C21C5/35 , C21C7/0685 , Y02P10/136
摘要： This invention relates to a method of producing stainless molten steel by a smelting reduction treatment - decarburization treatment of Cr raw materials such as Cr ores, Cr ore pellets and so on consecutively and at high treating speed in one container. In the smelting reduction, an inert gas is blown from bottom tuyeres to form an upheaving part of the molten metal on its surface and the inert gas is blown to this upheaving part. The molten metal is thereby caused to disperse into a region of the slag where the Cr materials float, so that the reduction of Cr is accelerated by C. On the other hand, decarburizing O.sub.2 is blown into the molten metal from a top lance, while O.sub.2 for a post combustion is blown into the slag, so that a post combustion region is formed mainly in the slag, and the slag is forcibly agitated by blowing the gas from the side tuyere, so that a heat generated by the post combustion is caused to transfer to Cr ores at high heat transfer efficiency, and a high post combustion is secured, as maintaining the post combustion ratio to be more than 0.3. After having completed the smelting reduction, the slag is discharged. The molten metal is agitated by blowing the decarburizing O.sub.2 diluted with the inert gas from the top lance, and blowing the inert gas from the bottom tuyeres.
摘要翻译： PCT No.PCT / JP88 / 00910 Sec。 371日期：1989年4月25日 102（e）日期1989年4月25日PCT提交1988年9月9日PCT公布。公开号WO89 / 02478 日本特开1989年3月23日。本发明涉及通过冶炼还原处理生产不锈钢的方法 - 在一个容器中连续和高处理速度的Cr原料如Cr矿石，Cr矿粒等进行脱碳处理。在熔炼还原中，从底部风嘴吹入惰性气体，在其表面形成熔融金属的上升部分，并将惰性气体吹送到该顶部。熔融金属因此被分散到Cr材料浮渣的炉渣区域中，Cr的还原加速C.另一方面，从顶部喷枪向熔融金属吹入脱碳，同时用于后燃烧的O2被吹入炉渣中，从而主要在炉渣中形成后燃烧区域，并且通过从侧风口吹入气体来强制搅拌炉渣，从而引起由后燃烧产生的热量以高的传热效率转移到Cr矿石中，并且确保高的后燃烧，因为保持后燃烧比大于0.3。在完成熔炼还原后，炉渣排出。通过从顶部喷枪吹入用惰性气体稀释的脱碳O2并从底部风嘴吹入惰性气体来搅拌熔融金属。

9. 发明授权

US5047081A Method of decarburizing high chromium molten metal 失效
标题翻译：高铬熔融金属脱碳方法
公开(公告)号：US5047081A
公开(公告)日：1991-09-10
申请号：US320270
申请日：1989-04-05
申请人： Haruyoshi Tanabe , Masahiro Kawakami , Kenji Takahashi , Katsuhiro Iwasaki , Shigeru Inoue
发明人： Haruyoshi Tanabe , Masahiro Kawakami , Kenji Takahashi , Katsuhiro Iwasaki , Shigeru Inoue
IPC分类号： C21B11/00 , C21B13/00 , C21C5/00 , C21C5/28 , C21C5/30 , C21C5/35 , C21C7/068
CPC分类号： C21B13/0006 , C21C5/005 , C21C5/35 , C21C7/0685 , Y02P10/136
摘要： The present invention relates to a method which may decarburize high Cr molten metal for a short period of time under an atmospheric pressure, while checking loss of Cr by its oxidation. A basic feature of the invention is to blow from the furnace top lance a decarburizing O.sub.2 diluted by an inert gas into the high Cr molten metal supported in a container as well as blow the inert gas from bottom tuyeres so as to forcibly agitate the molten metal. Another feature of the invention is to control a slag amount during the above decarburizing blowing so as to check the Cr oxidation loss. A further object of the invention is to carry out a denitrification in the above decarburization, thereby to produce low N molten metal while checking the loss by Cr oxidation.
摘要翻译：熔融不锈钢是mfd。通过连续地使Cr材料如Cr矿石或Cr颗粒在一个容器中以高处理速度进行熔融还原和脱碳。方法包括熔融红。通过底吹风口吹入惰性气体，在熔融金属表面上形成凸起，并通过侧吹风口将惰性气体吹向凸起，以将熔融金属扩散到炉渣中的Cr材料浮起区域，以加速用熔融金属中所含的C还原Cr材料。或者，通过顶吹喷枪将O2吹入熔融金属中，将二氧化二氧化二氧化成炉渣，形成主要在炉渣中的二次燃烧区，并通过侧吹气体剧烈搅拌炉渣，以高效率二次燃烧到Cr矿石，同时将第二燃烧比保持在0.3以上以确保高二次燃烧。在熔体还原之后，排出炉渣和用惰性气体稀释的用于脱碳的顶吹O2，并通过底吹风口吹入惰性气体，剧烈搅拌熔融金属。

10. 发明授权

US5000784A Method for smelting reduction of iron ore 失效
标题翻译：冶炼铁矿石冶炼方法
公开(公告)号：US5000784A
公开(公告)日：1991-03-19
申请号：US276612
申请日：1988-11-28
申请人： Kenji Takahashi , Katsuhiro Iwasaki , Shigeru Inoue , Haruyoshi Tanabe , Masahiro Kawakami , Kenzo Yamada , Osamu Terada
发明人： Kenji Takahashi , Katsuhiro Iwasaki , Shigeru Inoue , Haruyoshi Tanabe , Masahiro Kawakami , Kenzo Yamada , Osamu Terada
IPC分类号： C21B11/00 , C21B13/00 , C21B13/14 , C22B5/14 , F27B15/10 , F27B19/02 , F27B19/04
CPC分类号： C21B13/143 , Y02P10/136
摘要： A method for smelting reduction of iron ore comprises the steps of: preheating and prereducing iron ore; charging said preheated and prereduced iron ore, carbonaceous material and flux into a smelting reduction furnace; blowing oxygen gas through a top blow oxygen lance having decarburizing nozzles and post-combustion nozzles into said smelting reduction furnace, an end of said top blow oxygen lance being arranged between an upper side level of a slag layer and a lower side level of said slag layer; blowing a stirring gas through at least one side tuyere placed in side wall of said smelting furnace and at least one bottom tuyer placed in bottom wall of said reduction furnace so that at least part of said stirring gas introduced through at least one said side tuyere hits a swollen portion of the molten metal by said stirring gas introduced through at least one said bottom tuyere; and controlling a flow rate of said oxygen gas and said stirring gas blown in said smelting reduction furnace so that an OD of infurnace gas of said smelting furnace ranges 0.5 to 1.0, where said OD is represented by the following formula: OD=(H.sub.2 O+CO.sub.2 )/(H.sub.2 +H.sub.2 O+CO+CO.sub.2). And, further, an apparatus used in the above-mentioned method.

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