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11. 发明专利

JPS6261766A CONTINUOUS CASTING METHOD WITH LESS CENTRAL SEGREGATION 失效
公开(公告)号：JPS6261766A
公开(公告)日：1987-03-18
申请号：JP20138485
申请日：1985-09-11
申请人： KAWASAKI STEEL CO
发明人： KINOSHITA KATSUO , SHINJO YUTAKA , YAMAZAKI HISAO , OGUCHI MASAO , KAWABUCHI MASANOBU
IPC分类号： B22D11/128 , B22D11/12
摘要： PURPOSE:To improve quality by successively rolling down an ingot to decrease the section of the ingot by the amt. corresponding to the volume shrinkage based on the shrinkage on solidification from the prescribed position in the casting direction of a residual molten metal pool up to the foremost end, then executing casting. CONSTITUTION:Anvil groups 5 are disposed above and below a roller table 4 from the position of 2-15mm before the foremost end in the casting direction of the molten metal pool 2 up to the foremost end of the pool 2. The anvils 5 are connected to a hydraulic compressing system and is moved back and forth like walking beams; at the same time, the anvils exert the compression of the prescribed amt. per unit length to the solidified shell 1. The ingot is thereby successively rolled down by as much as the amt. corresponding to the volume shrinkage based on the solidification of the liquid core of the ingot. The central segregation of a slab or bloom is thus decreased and the quality is improved.

12. 发明专利

JPS60257964A INGOT MAKING DEVICE FOR FLAT STEEL INGOT 失效
公开(公告)号：JPS60257964A
公开(公告)日：1985-12-19
申请号：JP11628484
申请日：1984-06-06
申请人： KAWASAKI STEEL CO
发明人： MATSUKAWA TOSHITANE , NANBA AKIHIKO , KINOSHITA KATSUO , MIYAGAWA SABUROU
IPC分类号： B22D7/06 , B22D27/04
摘要： PURPOSE:To suppress generation of inverse V segregation and porosity and to provide a reduction in heat diffusing time and improvement in workability by constituting an ingot making device for a flat steel ingot of a casting mold installed with a heat insulating material on the inside circumferential surface, double molding boards made of a cast iron having a pouring port in the small part at the side end of the bottom and double molding boards made of an internally water-cooled copper plate in the remaining part of the bottom. CONSTITUTION:The pouring port 16 does not exist at the double molding boards 22 made of the internally water-cooled copper plate and therefore the extraction of heat from the bottom is ideal and the steam explosion or the injury of the copper plate arising from the penetration of the molten steel into the spacing between the copper plate and the pouring port 16 made of refractories is prevented. Since the port 16 part is made of cast iron, the extraction of heat from the base near the end is decreased and the progression of solidification near the end is made into one way, by which the generation of the inverse V segregation is relieved. The internally water-cooled copper plate 24 occupies the greater part of the base to accelerate the rate of solidification. The operation after ingot making is made easy by closing the port 16 with a sliding nozzle 28.

13. 发明专利

JPS60244461A PRODUCTION OF CLEAN STEEL INGOT 失效
公开(公告)号：JPS60244461A
公开(公告)日：1985-12-04
申请号：JP9742184
申请日：1984-05-17
申请人： KAWASAKI STEEL CO
发明人： NAKANISHI KIYOUJI , SHINJIYOU YUTAKA , NANBA AKIHIKO , KINOSHITA KATSUO , SAITOU KENJI
IPC分类号： B22D27/06 , B22D7/00 , B22D27/18
摘要： PURPOSE:To prevent incorporation of an exothermic heat reserving material into a killed molten steel and to produce a clean steel ingot by bottom-pouring said steel into a casting mold then charging a flux maintained in a molten state onto the surface of the molten metal and spraying the heat reserving material thereon in succession thereto. CONSTITUTION:The flux maintained preliminarily in a molten state is charged onto the molten metal from above a casting mold onto the surface of the molten metal to form a molten slag layer at the end period of pouring the killed molten steel or right after the pouring in the stage of bottom-pouring of said steel into the casting mold and making an ingot. The above-mentioned flux consisting of about

14. 发明专利

JPS58167063A METHOD FOR PREVENTING CLOSING OF IMMERSION NOZZLE FOR CONTINUOUS CASTING 失效
公开(公告)号：JPS58167063A
公开(公告)日：1983-10-03
申请号：JP4985582
申请日：1982-03-26
申请人： KAWASAKI STEEL CO
发明人： FUJII TETSUYA , KINOSHITA KATSUO , OGUCHI MASAO
IPC分类号： B22D11/10 , B22D11/16 , B22D41/60
摘要： PURPOSE:To prevent closing of immersion nozzles that arises from low temp. charging of molten metal by forming an electrically closed circuit communicating with each molten metal in the nozzles, in an intermediate vessel and in a casting mold, forming a mutual induction coupling circuit using the closed circuits as its secondary circuit and generating alternating current in the secondary circuit. CONSTITUTION:Immersion nozzles 6, 7 are juxtaposed to a tundish 1, and a magnetic core 9 constituting a transformer part 8 is intersected with the outside circumference of one nozzle 7. A primary winding 10 connecting to an electric power source is wound in the end part of the core 9. An electrically closed loop is created by the molten metal 3 in the tundish 1, the nozzles 6, 7 and a casting mold 4, and the loop functions as a secondary conductor of the transformer 8. When electric current is flowed to the primary winding 10, routes (a), (b), (c), (d) form a secondary winding, through which the induced current flows, thereby constituting a transformer. Since the sectional area of the routes (b), (d) is smallest, the current density in this part is largest, and the nozzles 6, 7 are heated thoroughly by Joule heat, whereby the closing of the nozzles is prevented.

15. 发明专利

JPS5653849A CONTINUOUS CASTING METHOD OF STEEL SLAB OF LESS SURFACE DEFECTS 失效
公开(公告)号：JPS5653849A
公开(公告)日：1981-05-13
申请号：JP13067379
申请日：1979-10-08
申请人： KAWASAKI STEEL CO
发明人： KINOSHITA KATSUO , KITAOKA HIDENARI , EMI TOSHIHIKO
IPC分类号： B22D11/04 , B22D11/16
摘要： PURPOSE:To prevent the longitudinal cracking of corner parts, breakout, etc. and obtain a steel slab of less surface defects in a continuous casting method of a steel slab, by so setting the short side taper of a mold as to substantially satisfy the specific formula. CONSTITUTION:In a continous casting method of a steel slab, the short side taper of a mold is so set as to substantially satisfy the formula [T'P (Z); short side taper of the mold (%/m), beta; in-mold heat extraction characteristic value of mold flux (integers of 1-10), V: casting speed (m/mm.), Z; distance taken in the pouring direction from meniscus (m)], whereby the longitudinal cracking in the surface and inside of the corner parts is considerably decreased, and the breakout owing to steel leakage through the corner longitudinal cracks may be nearly prevented, thus the steel slab of less surface defects is obtained.

16. 发明专利

JPH0861639A PLASMA MELTING FURNACE FOR WASTE INCINERATION ASHES 失效
公开(公告)号：JPH0861639A
公开(公告)日：1996-03-08
申请号：JP21815994
申请日：1994-08-19
申请人： KAWASAKI HEAVY IND LTD , KAWASAKI STEEL CO , TOKYO ELECTRIC POWER CO
发明人： HARA MASAHIRO , MATSUOKA YOSHITO , KINOSHITA KATSUO , HAYASHI AKIHIKO , YAMAZAKI TAKETOSHI , SHIMOYAMA MUNEYASU
IPC分类号： F23G7/00 , F23G5/44 , F23J1/00 , F27B3/08 , F27B3/18
摘要： PURPOSE: To provide a plasma melting furnace for waste incineration ashes capable of increasing the melting efficiency of the waste incineration ashes. CONSTITUTION: A central part of a furnace lid 4 of a furnace body 1 having a substantial circular shape is provided with one plasma torch 5, a desired position at a furnace wall 7 is provided with a scale outlet port 8, and an ash feeding inlet 11 is placed at a desired symmetrical position with a line passing through the scale outlet at a furnace wall opposing against the scale outlet and through a center of the furnace body being applied as a center. There is provided an ash feeding device 13 for alternatively pushing dust ignition ashes 1.2 from both ash feeding inlets through a substantial middle part between the plasma torch and the furnace wall in a direction crossing at a right angle with a center line toward the scale outlet port, thereby the waste ignition ashes pushed into the furnace are flowed on the melted substances with an expansion of fan-shaped form.

17. 发明专利

JPH0461990A METHOD AND APPARATUS FOR HIGHLY TREATING POLLUTED WATER 失效
公开(公告)号：JPH0461990A
公开(公告)日：1992-02-27
申请号：JP16684490
申请日：1990-06-27
申请人： KAWASAKI STEEL CO , TOYOHIRA SEIKOU KK
发明人： YASUI TAKAYUKI , KAWASAKI KIYOKATSU , KINOSHITA KATSUO , TANPO NORIHITO
IPC分类号： C02F3/00 , C02F3/30
摘要： PURPOSE:To remove not only phosphorus or biodegradable org. matter and hardly biodegradable org. matter but also nitrogen by forming a soil trench having an upper permeable trench pipe and a bottom water gathering trench pipe built therein in soil and forming an anaerobic region to the bottom part of the soil trench so as to freely adjust the volume thereof. CONSTITUTION:After a water impermeable sheet 1 is laid, upper water permeable trench pipes 2 and a bottom water gathering trench pipe 3 are arranged. Sewage secondary treated water 4 is allowed to flow in the upper water permeable trench pipes 2 to be allowed to penetrate in soil. The treated water 4 is purified by aerobic bacteria in soil to be recovered from the bottom water gathering trench pipe 3. At this time, the part above the water level in the bottom water gathering trench pipe 3 is unsaturated with water but the part therebelow is saturated with water and the saturated region becomes an anaerobic region 6, and nitrogen can be removed by the denitrifying action of anaerobic bacterial. By this method, not only phosphorus or medium and low concn. org. matters but also nitrogen can be removed and, by properly controlling the anaerobic region 6, high order treatment of a high removing rate can easily be carried out.

18. 发明专利

JPH0317413A RESTARTING OF MOVABLE PLASMA TORCH 失效
公开(公告)号：JPH0317413A
公开(公告)日：1991-01-25
申请号：JP14953889
申请日：1989-06-14
申请人： KAWASAKI STEEL CO , TOKYO ELECTRIC POWER CO
发明人： KINOSHITA KATSUO , YAMAZAKI TAKETOSHI , OHASHI HIDETOSHI , NAKAGAWA TOSHIHIKO
IPC分类号： H05H1/32 , B09B3/00 , F23G5/00
摘要： PURPOSE:To prevent damages to a plasma torch during its downward movement and restart the torch operation easily and rapidly by a method wherein a sensor is used to detect the state of the surface of molten substances in a furnace when a plasma is put out, the front end of a plasma torch is set at a specific position form the surface thereof and voltage is applied between the plasma torch and an electrode to restart the torch operation. CONSTITUTION:A movable plasma torch 2 is used in a burned waste ash melting furnace so as to produce an arc 4 between itself and an outer electrode 5, thereby melting a slag 3. If the arc 4 is put out for some reason, a detecting pin 11 of 50mm length is attached to the end of the plasma torch 2 to detect the state of the surface of the molten slag and any object which exists thereon. When the detecting pin 11 detects any object by contact pressure, it is removed. With the front end of the plasma torch 2 set at a position of 25-50mm form the surface of the molten substances, voltage is applied between the plasma torch and the electrode to restart the torch operation, thereby preventing damages to the torch from occurring.

19. 发明专利

JPH0311221A SLAG DISCHARGE PORT OF INCINERATION ASH MELTING FURNACE 失效
公开(公告)号：JPH0311221A
公开(公告)日：1991-01-18
申请号：JP14305689
申请日：1989-06-07
申请人： KAWASAKI STEEL CO , TOKYO ELECTRIC POWER CO
发明人： NAKAGAWA TOSHIHIKO , YAMAZAKI TAKETOSHI , OHASHI HIDETOSHI , KINOSHITA KATSUO
IPC分类号： F23J1/08 , F27D3/15
摘要： PURPOSE:To facilitate a maintenance of a discharging port for a melted slag, provide a smooth operation and a reduction in cost by a method wherein a part of liquid surface of melted slag is exposed in the surrounding atmosphere through a hidden bank and a removable bank is arranged at a side wall of the liquid surface exposed to the surrounding atmosphere. CONSTITUTION:In case that a plasma arc is generated between a plasma torch 2 and an external electrode 3 to melt incineration ashes and to produce a melted slag 4, the melted slag 4 passes through the bank 4, flows to a surrounding atmosphere exposed part 7 under a principle of a communication pipe to form a liquid surface 6. The surrounding atmosphere exposed part 7 is provided with an overflow bank 8 to act as a slag discharging port. The overflow bank 8 is made of replaceable cast iron bank and in case of replacing the bank, a furnace is inclined slightly toward an arrow 10 and the replacing work can be carried out without interrupting the operation.

20. 发明专利

JPS60177950A MOLDING BOARD FOR UNIDIRECTIONALLY SOLIDIFIED STEEL INGOT 失效
公开(公告)号：JPS60177950A
公开(公告)日：1985-09-11
申请号：JP3251584
申请日：1984-02-24
申请人： KAWASAKI STEEL CO
发明人： YOSHIDA MASAKAZU , NANBA AKIHIKO , YAO SHIYOU , KINOSHITA KATSUO
IPC分类号： B22D7/06 , B22D27/04
摘要： PURPOSE:To decrease inverse V segregation of a steel ingot and to improve the yield thereof by laying a steel bed plate atop cooling water pipes arranged on top of a molding board part to intensity the heat extraction for cooling. CONSTITUTION:Plural pipe groups 12 for cooling water are laid atop a molding board part 4 and a steel bed plate 11 is laid on the groups 12. A casting mold 1 is installed atop the plate 11. A molten steel is poured through a runner 6 into the mold 1 from the bottom thereof by which an ingot is formed. The plate 11 is welded to a steel ingot 10 by such molding board by which the formation of a gap is made difficult and the coefft. of heat transmission is increased. Heat extraction is intensified by the groups 12 and the inverse V segregation of the ingot 10 is decreased. The yield of the ingot is thus improved.

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