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1. 发明专利

JP2003193125A METHOD AND SYSTEM FOR CONTROLLING VACUUM DEGREE IN EVACUATING FACILITY 审中-公开
公开(公告)号：JP2003193125A
公开(公告)日：2003-07-09
申请号：JP2001391274
申请日：2001-12-25
申请人： NIPPON STEEL CORP , NITTETSU PLANT DESIGNING CORP
发明人： YAMASHITA KOSUKE , TANAKA TOMOAKI , SUMI MAKOTO
IPC分类号： C21C7/10
摘要： PROBLEM TO BE SOLVED: To provide a method and a system for controlling vacuum degree in a furnace or a duct, by which scattering of metal or splash, is prevented while restraining chromium and iron losses in the molten metal in the case of decarburizing carbon-containing molten metal by blowing oxygen in the vacuum refining furnace. SOLUTION: In the vacuum refining furnace provided with an ejector-type evacuating apparatus and a water-sealed vacuum pump in the vacuum refining facility, when the vacuum-refining is applied to the molten metal, a part of exhaust gas exhausted from the water-sealed vacuum pump is returned back to the upstream side of an exhaust gas flowing path by adjusting the opening degree of a pressure-adjusting valve to control to the 8-53 kPa in the vacuum refining furnace. COPYRIGHT: (C)2003,JPO

2. 发明专利

JP2003139473A LEAKAGE DETECTION METHOD IN METALLURGICAL FURNACE 审中-公开
公开(公告)号：JP2003139473A
公开(公告)日：2003-05-14
申请号：JP2001339046
申请日：2001-11-05
申请人： NIPPON STEEL CORP , NITTETSU PLANT DESIGNING CORP
发明人： YAMASHITA KOSUKE , TANAKA TOMOAKI , SUMI MAKOTO
IPC分类号： F27D21/00
摘要： PROBLEM TO BE SOLVED: To provide a device which is excellent in durability and easy in con trol and maintenance for detecting the water leakage in the exhaust gas treat ment device in vacuum refinement equipment, etc., especially in a device using cooling water such as a water-cooled duct and an exhaust gas cooling device, and can detect the leakage of a slight quantity during vacuum treatment. SOLUTION: When treating high-temperature exhaust gas which generates from a metallurgical furnace after cooling or dedusting it after cooling, the water leakage of exhaust gas treatment device is detected in an early stage even if it is a little by measuring at least one of the steam humidity or the steam partial pressure in the exhaust gas from the part of exhaust gas.

3. 发明专利

JP2003105428A METHOD FOR REMOVING METAL DEPOSITED ON TIP OF TUYERE, AND METHOD FOR MEASURING TEMPERATURE OF MOLTEN METAL 有权
公开(公告)号：JP2003105428A
公开(公告)日：2003-04-09
申请号：JP2002212967
申请日：2002-07-22
申请人： NIPPON STEEL CORP , NITTETSU PLANT DESIGNING CORP
发明人： YAMASHITA KOSUKE , TANAKA TOMOAKI , SUMI MAKOTO
IPC分类号： B22D1/00 , B22D2/00 , C21C5/46 , C21C5/48 , C21C7/00 , C21C7/072 , F27D21/00 , F27D25/00 , F27D23/02
摘要： PROBLEM TO BE SOLVED: To provide a method for melting and removing a metal deposited on a tip of a tuyere of a double or triple pipe structure used to blow a process gas or a purge gas for measuring the temperature of molten metal in a refining furnace. SOLUTION: In the method for removing the metal deposited on the tip of the tuyere of the double or triple pipe structure dipped in the molten metal in the refining furnace, the refining furnace under the operation is empty, and in the case of the tuyere of double pipe structure, a hydrocarbon gas, a liquid fuel or a combustible gas is singly run, or at least two of them are mixed and run in a flow passage in a space between outer and inner pipes, and a gas containing oxygen in which gaseous oxygen is regulated in a combustible concentration range is run in the inner pipe of the tuyere. In the case of the tuyere of the triple pipe structure, the hydrocarbon gas, the liquid fuel or the combustible gas is singly run, or at least two of them are mixed and run in a flow passage in a space between the outermost pipe and a middle pipe, and the gas containing oxygen in which gaseous oxygen is regulated in the combustible concentration range is run in a flow passage in a space between the middle pipe and the innermost pipe of the tuyere. The metal deposited on the tip of the tuyere is melted and removed.

4. 发明专利

JP2003041317A Device and method for sealing hole for charging alloy and auxiliary material in vacuum refining furnace 有权
标题翻译：用于在真空精炼炉中充填合金和辅助材料的孔密封的装置和方法
公开(公告)号：JP2003041317A
公开(公告)日：2003-02-13
申请号：JP2001228143
申请日：2001-07-27
申请人： Nippon Steel Corp , Nittetsu Plant Designing Corp , 新日本製鐵株式会社 , 日鐵プラント設計株式会社
发明人： YAMASHITA KOSUKE , TANAKA TOMOAKI , SUMI MAKOTO
IPC分类号： C21C7/10
摘要： PROBLEM TO BE SOLVED: To provide a sealing device which can prevent a blockage in a hole for charging an alloy and an auxiliary material, even under a refining condition with severe upward spouting of iron and splash, and provide a sealing method.
SOLUTION: The sealing device for sealing the hole 12 for charging the alloy and the auxiliary material into the vacuum refining furnace, which is arranged on the top of the vacuum refining furnace 1, is characterized by arranging a pseud-lance 5 integrated with a valve disc into a monolithic structure, below a lower part seal valve 6 for sealing the hole for charging the alloy and the auxiliary material; further installing a seal hole 9 for spraying a seal gas on the pseud-lance, in an inner wall of the hole for charging the alloy and the auxiliary material, as required; and connecting both the lower part seal valve and the pseud-lance to elevators which are installed in both sides of a chute for charging the alloy and the auxiliary material.
COPYRIGHT: (C)2003,JPO
摘要翻译：要解决的问题：提供一种能够防止在用于充填合金和辅助材料的孔中堵塞的密封装置，即使在严重向上喷射铁和飞溅的精炼条件下，也提供密封方法。解决方案：将用于将合金和辅助材料充入孔12的密封装置设置在真空精炼炉1的顶部的真空精炼炉中，其特征在于布置与阀一体化的假针5 在下部密封阀6下方密封用于对合金和辅助材料充电的孔; 进一步安装密封孔9，用于根据需要在密封孔的内壁上喷涂密封气体，用于填充合金和辅助材料的孔; 并将下部密封阀和假枪连接到安装在用于对合金和辅助材料充电的滑槽两侧的电梯。

5. 发明专利

JP2004076058A Method for ventilating gas in returned water storing vessel in evacuating apparatus and water-sealing cover for returned water storing vessel 有权
公开(公告)号：JP2004076058A
公开(公告)日：2004-03-11
申请号：JP2002235726
申请日：2002-08-13
申请人： Nippon Steel Corp , Nittetsu Plant Designing Corp , 新日本製鐵株式会社 , 日鐵プラント設計株式会社
发明人： YAMASHITA KOSUKE , TANAKA TOMOAKI , SUMI MAKOTO
IPC分类号： F24F7/06 , C21C7/10
摘要： PROBLEM TO BE SOLVED: To provide a method and equipment for preventing the leakage of CO-containing gas from a hot-well and a method and equipment for minimizing damage to the equipment occurring when cooling water overflows into the hot-well, for exhaust gas treatment equipment in a vacuum refining furnace.
SOLUTION: A method for ventilating gas in a returned water storing vessel in an evacuating apparatus, is characterized in that the evacuation is performed by using a suction means from an exhaust gas duct connected with the upper part of the returned water storing vessel for water for condensers etc., in a vacuum refining facility provided with the evacuating apparatus and the gas for ventilating is introduced into the returned water storing vessel from the suction duct of the gas for ventilating connected with the upper part of the returned water storing vessel. Further, a water-sealing cover for returned water storing vessel composed of a partition cover disposed without being fixed, is arranged at the upper part of the returned water storing vessel of the water for condensers etc., in the vacuum refining facility provided with the evacuating apparatus.
COPYRIGHT: (C)2004,JPO

6. 发明专利

JP2003294534A Temperature measuring device for molten metal 审中-公开
标题翻译：用于金属的温度测量装置
公开(公告)号：JP2003294534A
公开(公告)日：2003-10-15
申请号：JP2002103264
申请日：2002-04-05
申请人： Nippon Steel Corp , Nittetsu Plant Designing Corp , 新日本製鐵株式会社 , 日鐵プラント設計株式会社
发明人： YAMASHITA KOSUKE , TANAKA TOMOAKI , SUMI MAKOTO
IPC分类号： G01J5/08 , B22D2/00 , G01J5/00 , G01J5/02 , G01J5/10
摘要： PROBLEM TO BE SOLVED: To provide a cooling system for protecting a fiber and an imaging device against thermal effect, and a temperature measuring device for a molten metal capable of easy control thereof and stable temperature measurement.
SOLUTION: This temperature measuring device for the molten metal is characterized by comprising four connectable parts, namely, a nozzle part, a purge-cooling gas introduction part, a fiber fixing part with a window glass, and a fiber protecting tube. Hereby, the distance from the tuyere tip which is an introduction part of heat radiation light relative to a double pipe tuyere to a fiber tip light-receiving part can be shortened, to thereby receive more heat radiation light.
COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：提供一种用于保护纤维和成像装置免受热效应的冷却系统，以及用于容易控制和稳定的温度测量的用于熔融金属的温度测量装置。解决方案：该熔融金属温度测量装置的特征在于包括四个连接部分，即喷嘴部分，吹扫冷却气体引入部分，具有窗玻璃的纤维固定部分和纤维保护管。因此，能够缩短作为热辐射光的导入部的风口的距离相对于双管风口到纤维末端受光部的距离，从而接收更多的散热光。版权所有（C）2004，JPO

7. 发明专利

JP2001311589A METHOD FOR REDUCING OR REMOVING HAZARDOUS SUBSTANCE IN EXHAUST GAS 失效
公开(公告)号：JP2001311589A
公开(公告)日：2001-11-09
申请号：JP2000130281
申请日：2000-04-28
申请人： NIPPON STEEL CORP
发明人： YAMASHITA KOSUKE , KITAGUCHI HISATSUGU
IPC分类号： F23G7/06 , B01D51/04 , C21C5/38 , F27B1/18 , F27B3/10 , F27D13/00 , F27D17/00
摘要： PROBLEM TO BE SOLVED: To reduce or remove dioxins or the like in exhaust gas to a level satisfying regulatory standard value in a melting process using a large amount of iron-based scraps. SOLUTION: The copper content of a melt is kept at 0.12 mass % or less by using in a melting furnace the iron-based scraps of a low Cu content selected in advance. (1) By preheating the iron-based scraps by the exhaust gas, coarse particle dust having a high Cu content in the exhaust gas is captured and removed at a scrap side, and (2) on a downstream side of the exhaust gas of the melting furnace and a preheating furnace the coarse particle dust of a high Cu content is removed by a primary dust precipitator, or (3) the exhaust gas is cooled quickly after being burned completely in a combustion tower and kept at a high temperature. At the time of being subjected to dust collection by the dust precipitator a fine particulate powder is blown at a front face of the combustion tower or a front face of the dust precipitator so as to reduce an average Cu content in the exhaust gas.

8. 发明专利

JP2001311588A EXHAUST GAS TREATMENT METHOD AND APPARATUS 失效
公开(公告)号：JP2001311588A
公开(公告)日：2001-11-09
申请号：JP2000128673
申请日：2000-04-28
申请人： NIPPON STEEL CORP
发明人： YAMASHITA KOSUKE
IPC分类号： F23J15/06 , C21C5/38 , F27D17/00 , F27D21/00
摘要： PROBLEM TO BE SOLVED: To remove and recover dioxins and the like in exhaust gas while avoiding troubles of facilities due to fluctuation of the composition of exhaust gas without burning the exhaust gas containing a large amount of latent heat constituents produced in a scrap melting furnace and a preheating furnace using a large amount of fossil fuel. SOLUTION: The exhaust gas produced in the iron-based scrap melting furnace 1 or the preheating furnace 2 is subjected to a primary dust collection by a hot gas cyclone 3, then cooled indirectly in an indirect cooling tower 4, and is further subjected to dust removal in a main dry dust precipitator 5 so as to remove dioxins and the like at a low temperature. Then exhaust gas recovery is carried out. The composition of the exhaust gas produced in the melting furnace or the preheating furnace is analyzed and if the exhaust gas is reductive, dust collection is performed by the main dry dust precipitator 5 and if the exhaust gas is oxidative, dust collection is performed by a dry dust collector 6 for bypass purpose. A wet dust collector such as Venturi scrubber or the like can be used as the dust collector for bypass purpose in place of the dry dust collector 6.

9. 发明专利

JPH10140231A DEVICE FOR REMOVING SLAG ON IMMERSION TUBE AND METHOD THEREFOR 失效
公开(公告)号：JPH10140231A
公开(公告)日：1998-05-26
申请号：JP31258396
申请日：1996-11-11
申请人： NIPPON STEEL CORP
发明人： YAMASHITA KOSUKE
IPC分类号： C21C7/10
摘要： PROBLEM TO BE SOLVED: To surely recover removed slag, to facilitate carry-out work of the recovered slag and to enable removal of the slag in the case of sticking a large quantity of hard slag or even in the case of differing the outer diameters of immersion tubes, at the time of removing the slag stuck to the immersion tube in a vacuum and reduced pressure refining apparatus. SOLUTION: The slag 11 stuck to the immersion tube 10 in the vacuum and reduced pressure refining apparatus is removed by integrally elevating/ lowering an edge 2 and a chute 3, and recovered in the chute 3. The recovered slag is stored by dropping into a hopper 5 at the lower part from the opening hole part 4 at the center of the chute 3, and the slag stored in the hopper 5 is carried out together with the hopper 5 and threw out. Further, according to the sticking condition of the slag 11 to the immersion tube 10, the slag from the outside to the inside is removed in order while adjusting the slag removing diameter by changing the position of the edge 2.

10. 发明专利

JPH1025509A METHOD FOR RECOVERING PERMEABILITY OF POROUS PLUG IN LADLE 失效
公开(公告)号：JPH1025509A
公开(公告)日：1998-01-27
申请号：JP19525196
申请日：1996-07-08
申请人： NIPPON STEEL CORP
发明人： YAMASHITA KOSUKE
IPC分类号： C21C7/072
摘要： PROBLEM TO BE SOLVED: To melt the solidified metal stuck to a porous plug and to recover a gas permeability in a short time by immersing a lance near the porous plug having tendency to clogging, blowing gas and stirring molten steel in a ladle. SOLUTION: When the porous plug 3 in the ladle 1 has tendency to clogging, the lance 4 is immersed near the porous plug 3 in the molten steel 2 from an immersion tube 5. At this time, desirably, a cover 6 for preventing splash of the molten steel 2 is applied on the ladle 1. Inert gas of Ar or N2 , etc., is blown from the lance 4 to stir the molten steel 2, and the solidified metal stuck to the porous plug 3 is gradually remelted and the gas permeability of the porous plug 3 is recovered. Since the gas permeability of the porous plug 3 in the single ladle 1 can efficiently be recovered in a short time, such adverse effects as the obstruction to the productivity, the deterioration of molten steel quality and the raising of cost can be avoided.

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