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1. 发明专利

JP2002097507A MOLTEN PIG IRON PRODUCTION PROCESS AND EQUIPMENT FOR THE SAME 失效
公开(公告)号：JP2002097507A
公开(公告)日：2002-04-02
申请号：JP2000283957
申请日：2000-09-19
申请人： MITSUBISHI HEAVY IND LTD
发明人： KAMIKAWA SUSUMU , FUJIOKA HIRONORI , SATO KEIICHI , ONAKA YOSHIMITSU
IPC分类号： C22B1/216 , C21B11/00 , C21B13/10 , F27B9/18 , F27B9/40 , F27B17/00 , F27D19/00
摘要： PROBLEM TO BE SOLVED: To improve productivity in a production of molten pig iron. SOLUTION: This molten pig iron production processes are constituted as follows; (1) in an airtight space 15, a grate 7 is circulate horizontally in one way, and a material supply point 17 is located at a certain position on the grate 7, (2) discharge point 42 is located at a distance from the material supply point 17 in the circulating direction on the grate 7, (3) pellet 2 of an iron oxide material is fed and loaded on the grate 7 at the material supply point, (4) An uppermost layer of the pellet 2A on the grate is ignited by burners 21 in a chamber 19 and an atmosphere in a preliminary reduction chamber 20 is regulated by oxygen concentration control burners 22 so that the oxygen concentration in the preliminary reduction chamber 20 is inclined as the pellets travel on the grate to the discharge point, (5) pellets 2A are transported through the preliminary reduction chamber 20 and the gas in the airtight space 15 is downward by blown through the pellet to carry out preliminary reduction; (6) the pellets 2B are discharged at the discharge point 42 and are charged in a molten pig iron reduction furnace 27, where reduction is performed to produce the molten pig iron.

2. 发明专利

JP2002020814A DEVICE FOR DISCHARGING REDUCED IRON IN ROTARY HEARTH TYPE REDUCING FURNACE 失效
公开(公告)号：JP2002020814A
公开(公告)日：2002-01-23
申请号：JP2000203530
申请日：2000-07-05
申请人： MITSUBISHI HEAVY IND LTD
发明人： KAMIKAWA SUSUMU , FUJIOKA HIRONORI , OSAKA HIROMI , SATO KEIICHI , ONAKA YOSHIMITSU
IPC分类号： C22B1/16 , C21B13/08 , C21B13/10 , F27B9/16 , F27B9/39 , F27D3/00 , F27D3/06 , F27D3/08
摘要： PROBLEM TO BE SOLVED: To provide a discharging device for reduced iron in a rotary hearth type reducing furnace having little wastefulness in the mechanism and obtaining good yield. SOLUTION: The reduced iron P on the rotary furnace hearth 15 is scooped up from the front face side with an impeller 22 having the length covering the whole width of the rotary furnace hearth 15 and dropped down on a vibrating conveyor 26 disposed in the impeller 22 and discharged to the outside of the reducing furnace from a discharging hole 28.

3. 发明专利

JP2001049358A PRODUCTION OF IRON CARBIDE AND APPARATUS THEREOF 失效
公开(公告)号：JP2001049358A
公开(公告)日：2001-02-20
申请号：JP21829799
申请日：1999-08-02
申请人： MITSUBISHI HEAVY IND LTD
发明人： FUJIOKA HIRONORI , HIRATA KOICHI , SATO KEIICHI
IPC分类号： C22B5/14 , C21B13/00
摘要： PROBLEM TO BE SOLVED: To provide a method and an apparatus for efficiently producing iron carbide in a shot time. SOLUTION: Preheated reducing gas 2 is supplied from a reducing agent supplier 14 through a reducing agent preheater 15 into a fluidized bed reaction furnace 17 and, on the other hand, preheated powdery iron ore 1 from a raw material supplier 11 through a raw material preheater 12 and file powdery iron ore 1 recovered with a fine powdery raw material recovering device 13 are supplied into the fluidized bed reaction furnace 17. Further, coagulation preventive 3 from a coagulation preventive supplier 16 is supplied into the fluidized bed reaction furnace 17, and the iron ore 1, reducing gas 2 and coagulation preventive 3 are reacted in the fluidized state to produce the iron carbide 4 and the resultant iron carbide 4 is fed into a cooler 19 together with fine powdery iron carbide 4 recovered with a fine powder product recovering device 18 and is cooled to a room temp. Then, since the coagulation preventive 3 collides against the iron in a necessary and sufficient probability, the colliding probability among the iron particles is remarkably reduced and the coagulation is prevented, and thus the reaction temp. can be sufficiently raised.

4. 发明专利

JP2000129323A PRODUCTION OF REDUCED IRON AND PRODUCING EQUIPMENT 失效
公开(公告)号：JP2000129323A
公开(公告)日：2000-05-09
申请号：JP30016798
申请日：1998-10-21
申请人： MITSUBISHI HEAVY IND LTD
发明人： FUJIOKA HIRONORI , MIZUSHIRO HIDEAKI , HIRATA KOICHI , ITANO SHIGEO
IPC分类号： C21B11/08 , C21B11/10 , C21B13/10
摘要： PROBLEM TO BE SOLVED: To provide a producing method and producing equipment of reduced iron which prevents the reoxidation of the reduced iron produced in a rotary hearth type direct reducing furnace. SOLUTION: In the producing method of the reduced iron, raw material pellets which is produced by mixing iron oxide powder and carbonaceous powder are reduced in the rotary hearth type direct reducing furnace 1 and the reduced iron produced in the rotary hearth type direct reducing furnace 1 is melted in a closed type electric iron-making furnace 14 and also, reducing gas consisting essentially of CO2 by-produced in the clased type electric iron-making furnace 14 is made to flow into just the front of a discharging part 3 for reduced iron pellet in the rotary hearth type direct reducing furnace 1. In such a way, the reducing gas by-produced in the closed type electric iron-making furnace 14 is introduced just before the discharging part 3 for reduced iron pellet in the rotary hearth type direct reducing furnace 1 which is easily brought into contact with oxidizing gas (O2, CO2 and H2O gas, etc.), to lower the partial pressure of the oxidizing gas near the discharging part, and the reoxidation of the high temp. reduced iron pellet is restrained.

5. 发明专利

JP2000109912A REDUCTION METHOD OF WET PELLET IN ROTARY HEARTH TYPE REDUCTION FURNACE AND ROTARY HEARTH TYPE REDUCTION FURNACE 失效
公开(公告)号：JP2000109912A
公开(公告)日：2000-04-18
申请号：JP29451498
申请日：1998-09-30
申请人： MITSUBISHI HEAVY IND LTD
发明人： FUJIOKA HIRONORI , MIZUSHIRO HIDEAKI , HIRATA KOICHI , ITANO SHIGEO
IPC分类号： C22B1/16 , C21B13/08 , C21B13/10 , C22B1/20 , C22B1/216 , F27B9/16
摘要： PROBLEM TO BE SOLVED: To provide a reduction method of wet pellet with a rotary hearth type reduction furnace miniaturizing the furnace body and reducing the cost of an equipment. SOLUTION: In the reduction method of the wet pellet with the rotary hearth type reduction furnace, with which the wet pellet as the raw material is supplied on the rotary furnace hearth 20 in the furnace body 1 and this wet pellet is reduced by heating, beforehand a bedding grain layer 24 (heat insulating layer) is formed by spreading the grain 23 for heat insulating, having higher m.p. than the temp. in the furnace and successively, the wet pellet layer 12 as the raw material is formed on the bedding grain layer 24 (heat insulating layer). The bedding grain layer 24 is acted as the heat insulating layer against the wet pellet layer 12. Until the wet pellet as the raw material is charged into the furnace body 1 after discharging the high temp. reduced iron pellet to the outside of the furnace body 1 from the rotary furnace hearth 20, the surface temp. on the rotary furnace hearth 20 can be cooled with heat radiation to about 1000 deg.C and the distance (interval) for heat-radiating and cooling the rotary furnace hearth 20 is shortened and the furnace body 1 is miniaturized.

6. 发明专利

JPH09192705A HOT ROLLING LINE 失效
公开(公告)号：JPH09192705A
公开(公告)日：1997-07-29
申请号：JP654696
申请日：1996-01-18
申请人： MITSUBISHI HEAVY IND LTD
发明人： HIRATA KOICHI , NAKAJIMA HIROSHI , FUJIOKA HIRONORI
IPC分类号： B21B1/34 , B21B1/46 , B21B13/22 , B22D11/04 , B22D11/05 , B22D11/06 , B22D11/12 , B22D11/128
摘要： PROBLEM TO BE SOLVED: To change the width of a slab during the operation of casting, to reduce the number of rolling mill and to shorten a line. SOLUTION: In a belt type continuous casting machine 1, a mold part 8 is formed with a pair of water-cooled belts 5 and a pair of side dams and, evev during casting, the width of a slab 51 which is formed and discharged is changeable by changing the positions of the side dams. In this way, the working rate of the line is elevated and supply of a thin slab is enabled. The finishing mill 6 is composed of a reverse finishing mill 6a in the first half and a finishing mill 6b in the second half and the a conventional roughing mill is omitted with the reverse finishing mill, the number of rolling mill is reduced and the line is shortened.

7. 发明专利

JPH09184009A EQUIPMENT FOR HEAT TREATMENT OF SLAB 失效
公开(公告)号：JPH09184009A
公开(公告)日：1997-07-15
申请号：JP34253595
申请日：1995-12-28
申请人： MITSUBISHI HEAVY IND LTD
发明人： HIRATA KOICHI , NAKAJIMA HIROSHI , FUJIOKA HIRONORI
IPC分类号： C21D1/00 , C21D9/00 , F27B9/24 , F27B9/30
摘要： PROBLEM TO BE SOLVED: To restrain the increase of an equipment size in the case of heat treating a long slab. SOLUTION: A slab heat treatment equipment is provided with a heating furnace body 1, a fixed side furnace hearth 8, a movable side furnace hearth 10, a slab supplying line 2 and a slab sending out line 3. Further, groove type skids 9a for standing-up and inserting the slab 11 arranged on the fixed side furnace hearth 8 and the movable side furnace hearth 10, respectively and standing up and supporting the slabs over plural lines in the direction of connecting an inlet part 1a to an outlet part 1b of the heating furnace body 1, a slab transferring device 5a for transferring the slab 11 from the slab supplying line 2 to near the inlet part 1a of the heating furnace body 1, a slab standing-up device 4a for standing up the slab 11 from the slab transferring device 5a and delivering it to the skids 8a, a slab falling-down device 4b for receiving and falling down the stood-up slab 11 at the end of the outlet part 1b of the hearing furnace body 1 and a slab transferring device 5b for receiving the slab 11 from the slab falling-down device 4b and delivering it to the slab sending-out line 3, are provided.

8. 发明专利

JPH0810846A SHAPE STRAIGHTENING DEVICE FOR STRIP 失效
公开(公告)号：JPH0810846A
公开(公告)日：1996-01-16
申请号：JP14588494
申请日：1994-06-28
申请人： MITSUBISHI HEAVY IND LTD
发明人： FUJIOKA HIRONORI , TSUKUDA KAZUHIRO , MIZUTA KEIJI , MORII SHIGEKI , INOUE JUNJI , TOKIYASU KOICHI
IPC分类号： B21D1/00 , C23C2/24 , C23C2/40
摘要： PURPOSE:To adequately straighten the camber of a strip and to improve its quality. CONSTITUTION:Edge part electromagnets 11a, 11b and intermediate part electromagnets 12a, 12b are arranged at the respective ends in the transverse direction of the traveling strip 10 in such a manner that the disposing range w1 of the effective attraction force generating parts thereof attains (W/2)X0.85

9. 发明专利

JPH06287736A CONTINUOUS PLATING DEVICE 失效
公开(公告)号：JPH06287736A
公开(公告)日：1994-10-11
申请号：JP10015393
申请日：1993-04-05
申请人： MITSUBISHI HEAVY IND LTD
发明人： MIHARA KAZUMASA , FUJIOKA HIRONORI , MIZUTA KEIJI
IPC分类号： C23C2/20 , C23C2/24
摘要： PURPOSE:To prevent unequal plating thicknesses and to improve the quality of a plated thin strip with a device for correcting the C camber of the steel strip in a plating liquid film wiping section to be used for continuous plating equipment and coating equipment for the steel strip. CONSTITUTION:The metallic thin strip 1 transported by passing the inside of the plating liquid is injected with the high-velocity gas jets from gas jet nozzles 3 for wiping the plating films near these nozzles 3, by which the excess plating liquid of the plating films sticking to the surfaces of the thin strip 1 is scrapped off. A C camber deformation is generated in the thin strip 1 near the nozzles 3 for wiping. This warpage quantity is detected by sensors 4 for detecting the warpage quantity arranged right above the nozzles 3. The magnetic forces of magnets 2, 2 for correcting the camber deformation are acted on the direction where the camber in this section is eliminated and the magnitude thereof, by which the camber of the thin strip 1 is corrected. Consequently, the specified distances between the nozzles 3 for wiping and the thin strip 1 are set constant in the width direction of the thin strip. The wiping effect is thus uniformized in the width direction and the plating films having the uniform thicknesses are realized.

10. 发明专利

JPH05195051A DIRECT-FIRE BURNER TYPE UNIFORMLY HEATING DEVICE 失效
公开(公告)号：JPH05195051A
公开(公告)日：1993-08-03
申请号：JP2745692
申请日：1992-01-20
申请人： MITSUBISHI HEAVY IND LTD
发明人： MIHARA KAZUMASA , FUJIOKA HIRONORI
IPC分类号： C21D1/52 , C21D9/56 , F23M3/14
摘要： PURPOSE:To improve the quality of a heating-treated steel strip product by remarkably narrowing an interval in the width direction of a direct-fire heating part blown to the strip than the conventional device and enabling the device to directly heating the uniformized strip having little difference of heat conductivity in the width direction in the direct-fire burner type uniformly heating device used for continuous annealing and continuous galvannealing devices, etc., for steel strip. CONSTITUTION:At the time of injecting flame from the direct-fire burners 6 provided in the fixed interval so as to mutually position to the centers of refractory walls 2, 3 at the front and the rear parts sideward in the horizontal direction at the constant pitch height to the strip 5 shifted upward at the center part of the front side refractory wall 2 and the rear side refractory wall 3 in the heating zone part 1, the flame is filled up in the firing chamber 11 in the front side section parted with a refractory partition walls 7, 8 arranged in-between the strip 5 and the direct-firing burner 6. Further, small round holes 10 bored in the small interval on the whole surface of the refractory partition walls 7, 8 are used as firing hole so as to inject the flame and the strip 5 is heated by the direct fire from both surfaces.

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