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1. 发明专利

ID16806A 未知
公开(公告)号：ID16806A
公开(公告)日：1997-11-13
申请号：ID971143
申请日：1997-04-04
申请人： NIPPON STEEL CORP , NITTETSU PLANT DESIGNING CORP
发明人： ICHIKAWA HIROSHI , TAKAHASHI MAKOTO , HORA SHIRO , NAGATOMI MASAHIDE , HORIKAWA KOETSU
IPC分类号： C21B11/00 , C21B13/00 , F27B3/04 , F27B3/22 , F27D3/16
摘要： A smelting reduction apparatus for producing a molten metal under a slag by charging a metal raw material, a carbon material and a flux into a furnace having a rectangular horizontal section, and blowing oxygen and/or oxygen-enriched gas into the slag through lower tuyeres provided in the furnace side walls and a method for operating the same are improved. An inert gas is blown into the molten metal through bottom tuyeres provided near the center in the shorter side direction of the furnace bottom to ensure agitation of the slag near the center in the shorter side direction. An inert gas is blown into the slag through lowest tuyeres which are provided in the furnace side wall portions below the lower tuyeres and not lower than the interface between the slag and the molten metal and directed at a downward angle of 0 to 45 DEG from the horizontal direction and the slag directly above the molten metal is thus stirred, so that the relative speed between the slag and the molten metal is increased and the quantity of heat transfer from the slag to the molten metal is increased. The lower tuyeres are directed in the lateral direction from the direction vertical to the longer sides of the furnace at an angle of 15 to 45 DEG toward the direction opposite to that to a raw material charging inlet, so that the slag is also allowed to flow in the longer side direction of the furnace.

2. 发明专利

JPH07310115A NOZZLE STRUCTURE OF LANCE FOR BLOWING GASEOUS OXYGEN INTO ELECTRIC FURNACE 失效
公开(公告)号：JPH07310115A
公开(公告)日：1995-11-28
申请号：JP12200094
申请日：1994-05-12
申请人： NIPPON STEEL CORP , TOKYO TEKKO KK
发明人： HORA SHIRO , INOUE MASAAKI , HAISHI KEIICHI , MIMORI HIROYUKI
IPC分类号： C21C7/072 , C21C5/46 , C21C5/52 , F27D3/16
摘要： PURPOSE:To provide a nozzle structure for blowing gaseous oxygen or oxygen- containing gas in which the use efficiency of oxygen and powdery material is improved, the splash of molten metal and slag is minimized and the safe operation is secured by restraining the consumption of an electrode and the damage to a lance itself. CONSTITUTION:The nozzle in the lance is constituted of a divergent nozzle 15 for blowing the gaseous oxygen or the oxygen-containing gas at supersonic speed and a nozzle 16 arranged at an adjacent site above this nozzle for blowing the gaseous oxygen or the oxygen-containing gas at a supersonic speed or subsonic speed. By this constitution, the splash of the molten metal and slag caused by the gaseous oxygen or the oxygen-containing gas blown from the nozzle 15 at a supersonic speed is suppressed by the supersonic speed or subsonic speed jet from the nozzle 16 arranged at the adjacent site above the nozzle 15 to reduce the splash of the molten metal and slag. Therefore, the use efficiency of the gaseous oxygen is improved, and the splash of the molten metal and slag is minimized and a safe operation is secured while restraining the consumption of the electrode and the damage to the lance itself.

3. 发明专利

JPH10158708A STRUCTURE FOR FURNACE BODY OF SMELTING REDUCTION EQUIPMENT 失效
公开(公告)号：JPH10158708A
公开(公告)日：1998-06-16
申请号：JP32011096
申请日：1996-11-29
申请人： NIPPON STEEL CORP , NITTETSU PLANT DESIGNING CORP
发明人： ICHIKAWA HIROSHI , HORA SHIRO , NAGATOMI MASAHIDE
IPC分类号： C21B11/00
摘要： PROBLEM TO BE SOLVED: To provide a smelting reduction equipment capable of preventing carbonaceous material from floating and staying near the furnace side surface in the bath surface part of slag in the equipment for directly producing the molten metal and capable of accelerating redution reaction between the metallic material and the carbonaceous material in the molten slag by increasing the entrapped and suspended quantity of the carbonaceous material in the molten slag. SOLUTION: The molten metal is directly produced by adding the metallic raw material, carbonaceous material and flux into the furnace body having the rectangular shape in the horizontal cross-section and blowing and/or oxygen- adding gas into the slag through a lower tuyere 13 penetrating the long side of the furnace body 1 in the horizontal direction and arranged toward the slag 8. In this case, the carbonaceous material 19 is prevented from floating and staying near the furnace side surface in the bath surface part of the slag by regulating the position of the lower tuyere 13 to cause the rising fluid to the slag near the furnace side surface and the lowering fluid to the slag 8 at the center part of the furnace.

4. 发明专利

JPH10152709A STRUCTURE OF FURNACE BODY IN SMELTING REDUCTION EQUIPMENT 失效
公开(公告)号：JPH10152709A
公开(公告)日：1998-06-09
申请号：JP31245696
申请日：1996-11-22
申请人： NIPPON STEEL CORP
发明人： ICHIKAWA HIROSHI , HORIKAWA YUKINOBU , HORA SHIRO
IPC分类号： C21B11/00
摘要： PROBLEM TO BE SOLVED: To provide a smelting reduction equipment which can increase metallic iron ratio in an iron raw material, lowers the unit requirements of carbonaceous material and oxygen and also, can increase the production of molten iron, by enabling the use of large scale scraps as a part of the iron raw material and increasing the scrap ratio in the iron raw material without blowing gas from a tuyere below molten iron for stirring the metal. SOLUTION: This equipment is the one directly producing the molten iron by adding the metallic raw material, carbonaceous material and flux into the furnace body and blowing oxygen and/or oxygen-enriched gas into slag through lower tuyeres 13 penetrating the side surface of the furnace body 1 and arranged toward the slag 8. In such a case, what is called, a linear type electromagnetic induction stirring device 15 generating parallel moving magnetic field is arranged to generate the moving magnetic field in the horizontal direction at the bottom part of the furnace body.

5. 发明专利

JPH07113585A OXYGEN BLOWING APPARATUS FOR ELECTRIC FURNACE 失效
公开(公告)号：JPH07113585A
公开(公告)日：1995-05-02
申请号：JP28069393
申请日：1993-10-15
申请人： NIPPON STEEL CORP
发明人： TAKAHASHI MAKOTO , HORA SHIRO
IPC分类号： C21C7/072 , C21C5/52 , F27B3/08 , F27B3/22 , F27D3/16
摘要： PURPOSE:To prevent scrap from remaining unmelted at both sides of a working opening of a lance by providing the tip of an oxygen lance pipe with an oxygen blowing nozzle having two holes which respectively directs the oxygen jet thereof in the outward, downward direction with respect to the center axis. CONSTITUTION:An oxygen lance pipe 3 of an oxygen blowing apparatus provided in the vicinity of an electric furnace body 1 is capable of being rotated by means of a rotating mechanism 5 provided at the tip of an arm 4. The tip of the lance pipe can be swung by a lance-swinging mechanism 6 within the angle range of theta1 from the left end and to the right end of a working opening 2. The tip of the lance pipe 3 is provided with a two hole nozzle having two holes directed downward of the center axis. The jets of the two holes are respectively directed in the outward directions of the lance pipe axis. The blowing angle of the oxygen jets is made to form theta5 in a plane so that the oxygen jet angle can respectively be expanded to the sides by an angle of theta5/2 as compared with the angle in the case of using a single hole nozzle. The regions 8 at both sides of the working opening where the center flow of the oxygen jet cannot reach are reduced and the oxygen jet can effectively be blown onto the surface of steel melt.

6. 发明专利

JPH11310814A SMELTING REDUCTION FURNACE 失效
公开(公告)号：JPH11310814A
公开(公告)日：1999-11-09
申请号：JP12080498
申请日：1998-04-30
申请人： NIPPON STEEL CORP
发明人： HORA SHIRO
IPC分类号： C21B11/00 , F27B3/04
摘要： PROBLEM TO BE SOLVED: To provide a smelting reduction equipment, in which spattering of iron raw material is restrained in the case of using the iron raw material having fine powder of very small grain diameter, such as fine powdery iron ore developing in a stopping process of the iron ore in a mine or secondary ash developed in a blast furnace works, in the smelting reduction furnace. SOLUTION: In the smelting reduction furnace, in which a plurality of lower tuyeres 4 and upper tuyeres are arranged at both sides of lower part and upper part of the sidewall in a reaction vessel 1, respectively and a molten iron pool part 7 communicating with the reaction vessel through a first siphon hole 6a and a molten slag pool part 10 communicating with the reaction vessel through a second siphon hole 1b at the lower part of the reaction vessel, a charging hole 2 of raw material is disposed in a sidewall of the reaction vessel and at a position higher than the upper surface of the molten slag and at the height which is half or lower of the height above the upper surface of the molten slag to the roof part.

7. 发明专利

JPH10280019A FURNACE BODY STRUCTURE OF SMELTING REDUCTION EQUIPMENT 失效
公开(公告)号：JPH10280019A
公开(公告)日：1998-10-20
申请号：JP8855397
申请日：1997-04-07
申请人： NIPPON STEEL CORP
发明人： HORA SHIRO , HORIKAWA YUKINOBU
IPC分类号： C21B11/00
摘要： PROBLEM TO BE SOLVED: To reduce heat conducting quantity of a water cooling panel, to increase heat transfer quantity from a secondary combustion zone to molten slag zone and to reduce unit requirements of carbonaceous material and oxygen by coating heat insulating material on the surface of a water-cooling panel in a furnace body lining arranged at secondary combustion zone in the furnace body. SOLUTION: Metallic raw material of iron oxide, etc., carbonaceous material and flux are charged into the furnace body 1 fixed on a foundation 2 and oxygen-enriched gas is blown into the slag 8 from lower tuyerea 13 and the metallic raw material is reduced to produce molten metal 7 of pig iron, etc. Further, the gas produced in the reduction is burnt by blowing the oxygen from upper tuyeres 14 in the secondary combustion zone in the slag 8. This combustion heat is supplied into the slag 8 and the reducing action is promoted and a part thereof is absorbed with the water-cooling panel 3 in the furnace body lining and the balance is discharged from a gas exhaust hole. The heat insulating material 17 is coated on the surface of the water cooling panel 3 is the furnace body in smelting reduction equipment and the heat conduction of the secondary combustion heat is restrained to increase the supplying quantity to the slag 8.

8. 发明专利

JPH08110163A OXYGEN BLOWING DEVICE FOR ELECTRIC FURNACE 失效
公开(公告)号：JPH08110163A
公开(公告)日：1996-04-30
申请号：JP27017094
申请日：1994-10-11
申请人： NIPPON STEEL CORP
发明人： TAKAHASHI MAKOTO , HORA SHIRO
IPC分类号： F27B3/08 , C22B9/05 , F27B3/22
摘要： PURPOSE: To provide an oxygen blowing device, restricting the increase of generation of dust from the electric furnace by a method wherein a working port is not utilized is inserting an oxygen lance into the furnace to prevent the outflow of slag containing iron content out of the working port and minimize the opening area of a furnace body upon blowing oxygen in an oxygen blowing device for an electric furnace. CONSTITUTION: In a device for blowing oxygen gas from the upper part of an electric furnace, cutting solid metal such as scraps and the like, then melting them and refining the molten metal, a minimized opening is provided on the upper part of a furnace body or a furnace lid 2 and an oxygen lance is inserted through the opening upon blowing oxygen into the furnace, the lance is retreated and the opening is sealed by a movable water-cooled door 7 when the lance is not used.

9. 发明专利

JPH06192718A METHOD FOR BLOWING IN OXYGEN OR OXYGEN-CONTAINING GAS WITHOUT WEARING LANCE 失效
公开(公告)号：JPH06192718A
公开(公告)日：1994-07-12
申请号：JP35736392
申请日：1992-12-24
申请人： NIPPON STEEL CORP
发明人： TAKAHASHI MAKOTO , MAKINOSUMI SHINAN , HORA SHIRO , HIDAKA HIROMOTO
IPC分类号： C21C5/32 , C21C5/46 , C21C5/52 , C22B9/04 , F27D3/16
摘要： PURPOSE:To improve the utilizing efficiency of oxygen-containing gas, to suppress the spattering of molten metal and slag and to prevent the wearing of the lance by regulating blowing direction and blowing velocity, etc., of the lance for oxygen-containing gas from the upper part. CONSTITUTION:In a DC electric furnace 1 arranged with an upper electrode 6 and a furnace bottom electrode 7 in the furnace body 4, the lance 10 for blowing in oxygen and a lance 11 for blowing in powdery material are inserted from an operating hole 9, and by blowing in the oxygen or the oxygen- containing gas and the powdery material for refining into the molten metal 8 from the upper part, the refining is executed. Then, the height (h) from the surface of the molten metal 8 to the blowing out position of the lance 10 for blowing in oxygen is set at 300-700mm and the angle theta in the blowing out direction is made >=30 deg.. Further, the ratio L/H of L by equation VaXd=0.73X (L/sintheta ) X(h+L/ sin theta ) (wherein, Va: gas flowing velocity Nm/sec, d: throat diameter of a widened end nozzle mm, L: recessed depth of the molten metal by blowing in mm) the ratio of the L and depth H of the molten metal 8 is made 0.4-0.7.

10. 发明专利

JPH11279610A Structure for sealing refractory of smelting reduction furnace 失效
$Structure for sealing refractory of smelting reduction furnace$
标题翻译：密封减少炉的耐火材料密封结构
公开(公告)号：JPH11279610A
公开(公告)日：1999-10-12
申请号：JP8468298
申请日：1998-03-30
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： SHIBATA TOMOAKI , SHIMA SHINJI , HORA SHIRO
IPC分类号： C21B11/00
摘要： PROBLEM TO BE SOLVED: To provide a sealing structure of refractory in a smelting reduction furnace, in which the flow-out of molten material to the outside of the furnace is prevented, in the refractory structure at a discontinued portion of an iron shell surrounding a water-cooling panel and the refractory at the furnace bottom in the smelting reduction furnace.
SOLUTION: The smelting reduction furnace for iron raw material is provided with plural lower tuyeres and upper tuyeres at each of both sides of the lower part in a reaction vessel 4 and the upper part and a molten iron pool part and a slag pool at the lower part in the reaction vessel, and the water-cooling panel 5a surrounded with the upper iron shell 6 of the reaction vessel 4, is connected with the side wall 3b of the furnace bottom refractory 3a surrounded with the lower iron shell 2 at the furnace bottom. In such a case, a flange 2 is arranged at the lower end of the upper iron shell 6 and a copper-made water-cooling panel 5b is arranged at the lower part of the flange 7.
COPYRIGHT: (C)1999,JPO
摘要翻译：要解决的问题：提供一种在冶炼还原炉中提供耐火材料的密封结构，其中熔融材料流出炉外的流动在耐火结构中在铁壳周围的不连续部分熔融还原炉中的炉底的水冷板和耐火材料。解决方案：铁原料冶炼还原炉在反应容器4的下部两侧分别设有多个下风嘴和上风嘴，上部和铁水池部分和下部的渣池部分在反应容器中，并且由反应容器4的上部铁壳6包围的水冷板5a与炉底耐火材料3a的侧壁3b连接，炉壁耐火材料3a在炉底部被下铁壳2包围。在这种情况下，凸缘2设置在上铁壳6的下端，并且铜制的水冷板5b布置在凸缘7的下部。

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