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1. 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.

2. 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.

3. 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.

4. 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.

5. 发明专利

JPH08188813A METHOD FOR TREATING SLAG CONTAINING CHROMIUM STEEL 失效
公开(公告)号：JPH08188813A
公开(公告)日：1996-07-23
申请号：JP79395
申请日：1995-01-06
申请人： NIPPON STEEL CORP
发明人： KATO KATSUHIKO , YAMASHITA KOSUKE
IPC分类号： C21C5/28
摘要： PURPOSE: To provide a method for treating the chromium steel slag capable of the stabilization and the effective use of the chromium steel slag with a small amount of the slag stabilizing agent and of the similar quality of the molten steel to the conventional value. CONSTITUTION: In a method to heat the slag of chromium steel where the molten steel is tapped in the non-reduced condition after chromium steel is decarbonized and blown in a converter to the prescribed carbon concentration and temperature, the molten iron of the next heat is charged into the converter while the slag is left in the furnace, the slag containing chromium steel to be left in the previous heat by carbon in the molten iron or carbon to be charged as the sub raw material is reduced and refined while oxygen is blown and the temperature rises, the valuable elements such as chromium are collected, >=50% slag is discharged alter reduction is completed, and ferro-chromium is added successively to achieve the oxygen blowing and decarbonization, the substance containing borate, the substance containing phosphate, or the mixture thereof is added before or during the reduction and refining, and mixed completely in the slag, and the slag is discharged and cooled after reduction is completed.

6. 发明专利

JPH04131313A METHOD AND APPARATUS FOR DESULFURIZATION 失效
公开(公告)号：JPH04131313A
公开(公告)日：1992-05-06
申请号：JP25295990
申请日：1990-09-21
申请人： IRIE KOSAN KK , NIPPON STEEL CORP
发明人： TAJIMA YUICHIRO , SATO SABURO , SAKOMURA RIYOUICHI , KIMURA KOHEI , YAMASHITA KOSUKE
IPC分类号： C21C1/02
摘要： PURPOSE:To remarkably improve desulfurizing efficiency under a satisfactory working environment and to reduce desulfurizing cost by blowing the specific grain size of CaO granule into molten metal from the lance dipped by the prescribed depth under the specific condition. CONSTITUTION:The CaO granule is blown into the molten iron 11 in a torpedo car 10 with the lance 9 together with carrier gas. Then, >=85%wt.% of CaO powder consists of the powder of 45mum grain size and the desulfurizing treatment is executed under the conditions of >=700mm the dipping depth of lance 9, >=100m/sec gas line velocity and in the range of 4-60kg/min of powder supplying velocity. A conveyor 4 for pressure conveying the granule is communicated to the upper part of a blowing tank 1 in this desulfurizing apparatus through a slice valve 3, and at the lower part thereof, a powder discharge valve 5 which is provided with high chromium planting layer on the inner face of a casing and whose tip part of blade is formed to knife edge-state and in which the side plate is integrally fixed to both ends of the blade is communicated. On the other hand, the lance 9 and the powder discharge valve 5 are communicated through a three-way valve 7 and a guide pipe 8, and also a carrier gas piping 14 is communicated with the above guide pipe 8 through an automatic valve 13.

7. 发明专利

JP2007023306A Method and facility for desulfurizing molten pig iron 有权
标题翻译：用于脱硫铸铁的方法和设备
公开(公告)号：JP2007023306A
公开(公告)日：2007-02-01
申请号：JP2005202910
申请日：2005-07-12
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： YAMASHITA KOSUKE
IPC分类号： C21C1/02 , C21C5/28 , F27D3/15
摘要： PROBLEM TO BE SOLVED: To provide a method and facility for desulfurizing molten pig iron with which even in the case the setting place in the facility can not sufficiently be secured and the preparing cost can not be provided, the operational cycle of the desulfurizing treatment can be adopted to a converter operational cycle by improving a series of treating capacity from the desulfurization to the slag-removing treatment and shortening the operational cycle of the desulfurizing treatment containing the slag-removing treatment.
SOLUTION: The method for desulfurizing the molten pig iron, is adopted, in which the slag-removing treatment is performed with any slag-removing device to the molten pig iron pre-treated with a desulfurizing apparatus charged in another molten pig iron ladle, while succeeding the treatment with the desulfurizing apparatus to the molten pig iron charged in the one of molten pig iron ladle by using the desulfurizing apparatus for stirring while adding the desulfurizing agent into the molten pig iron, the plurality of slag-removing devices for slag-removing the slag generated in the molten pig iron after stirring and the desulfurizing facility at least provided with the plurality of molten pig iron ladles relatively shifted at least to the desulfurizing apparatus.
COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：为了提供一种用于使生铁脱硫的方法和设备，即使在设备中的设置位置不能充分确保并且不能提供准备成本的情况下，通过提高从脱硫到除渣处理的一系列处理能力，缩短含有除渣处理的脱硫处理的工作循环，可以在转炉运行循环中采用脱硫处理。
解决方案：采用脱硫处理方法，其中除渣处理是利用任何除渣装置进行到用另一熔融生铁装备的脱硫装置预处理的生铁生铁钢包，在将脱硫装置加入到生铁中的同时，通过使用脱硫装置进行搅拌而将用脱硫装置处理的熔融生铁装入熔融生铁水池中的熔融生铁中，将多个除渣装置在搅拌之后，将熔融生铁中产生的炉渣除渣，至少将多个熔融生铁水桶的脱硫设备至少相对移动至脱硫装置。版权所有（C）2007，JPO＆INPIT

8. 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

9. 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.

10. 发明专利

JPH1017923A SEAL DEVICE FOR VACUUM DEGASSING LANCE 失效
公开(公告)号：JPH1017923A
公开(公告)日：1998-01-20
申请号：JP19524896
申请日：1996-07-08
申请人： NIPPON STEEL CORP
发明人： YAMASHITA KOSUKE , KATAHIRA KEIICHI
IPC分类号： C21C7/10 , F27D7/06
摘要： PROBLEM TO BE SOLVED: To provide a seal device for vacuum degassing a lance which separates the outer surface of the lance and a seal tube at the time of elevating/lowering the lance and can lower the breaking frequency of the seal tube. SOLUTION: The heat resistant seal tube 3 is arranged on the inner peripheral surface of a hole 2 for inserting the lance in a vacuum vessel 1 for executing the vacuum degassing treatment of molten steel, and a pressure source 4 and a vacuum device 5 are connected with the seal tube 3. In the case of fixing the lance 6, a gap between the hole 2 for inserting the lance and the outer surface of the lance 6 is closed by pressurizing in the seal tube 3 to execute the vacuum seal. In the case of elevating/lowering the lance 6, the seal tube 3 is separated from the outer surface of the lance 6 by forcedly reducing the pressure in the seal tube 3. By this way, the breaking frequency of the seal tube at the time of elevating/lowering the lance is lowered and the service life is extended and the reduction in degassing capacity and the deterioration of the product quality can be prevented.

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