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1. 发明专利

JPH0465370A CASTING MATERIAL FOR MOLTEN PIG IRON PRETREATING VESSEL 失效
公开(公告)号：JPH0465370A
公开(公告)日：1992-03-02
申请号：JP17533390
申请日：1990-07-04
申请人： SHINAGAWA REFRACTORIES CO , NIPPON KOKAN KK
发明人： YAMAMURA TAKASHI , HAMAZAKI YOSHIHISA , KATAYAMA MUNEYOSHI , TSUNOMURA HISANORI , KATO HISAKI , HIRAGA NORIYUKI , MATSUMURA TAKEO , NISHI MASAAKI
IPC分类号： C04B35/66
摘要： PURPOSE:To reduce the modulus of elasticity while maintaining structure and strength and to improve spalling by adding andalusite to a high alumina-SiC-C casting material and specifying the particle size and amt. of the SiC. CONSTITUTION:This casting material consists of 10-55 wt.% andalusite, 3-15 wt.% carbon, 10-20 wt.% SiC having >= 2/1 weight ratio between powder of >=200 mum particle size and powder of =200 mum particle size reduces the modulus of elasticity. It is desirable that SiC is used as mentioned above, 20 wt.% SiC deteriorates corrosion resistance.

2. 发明专利

JPS63121610A GAS BLOWING PLUG 失效
公开(公告)号：JPS63121610A
公开(公告)日：1988-05-25
申请号：JP7114986
申请日：1986-03-31
申请人： NIPPON KOKAN KK , SHINAGAWA REFRACTORIES CO
发明人： KOBAYASHI MOTONOBU , NAKANISHI HIROAKI , HIRAGA NORIYUKI , TANABE HARUYOSHI , TAKI CHIHIRO , NAKAMURA HIROMI , KODAIRA SATOSHI , OZAKI YUKIO
IPC分类号： C21C5/48
摘要： PURPOSE:To permit sure and easy adjustment of a gas flow rate with a blowing plug having a gas passage extending from the root end to the front end by forming the gas passage to have the hole diameter larger on the root end side than on the front end side. CONSTITUTION:This gas blowing plug 10 is formed with the gas passage 20 extending from the root end 16 to the front end 18. The gas passage is formed to have the hole diameter 21A on the root end 16 side larger than the hole diameter 21B on the front end 18 side. The gas is supplied from the root end 16 to the gas passage 20 and is ejected from the front end 18.

3. 发明专利

JPH09316456A HOT RELAYING AND REPAIRING OF SIDEWALL OF CARBONIUZATION CHAMBER IN COKE OVEN 失效
公开(公告)号：JPH09316456A
公开(公告)日：1997-12-09
申请号：JP15480396
申请日：1996-05-28
申请人： NIPPON KOKAN KK , SHINAGAWA REFRACTORIES CO
发明人： HIRAGA NORIYUKI , MIYAMOTO KUNIAKI , IRIE SHIMIZU , MITSUOKA KINTA
IPC分类号： C10B29/04 , C10B29/06
摘要： PROBLEM TO BE SOLVED: To construct a sidewall without a fear for applying an excessive stress to the remaining part and leaking a gas therefrom by providing a strength and abrasion resistance when relaying and repairing the sidewall of a carbonization chamber in a coke oven. SOLUTION: A silica-based mortar is used in joints in the lower part of a sidewall (from bricks 1 in the first stage to bricks 3 in the 25th stage in the central part) requiring a strength and abrasion resistance, and a cushioning mortar having the shrinkability is used as joints in the upper part reduced in the load (in stages above the 26th stage). A ceramic board 9 having the elasticity and the high shrinkability is inserted between bricks 8 in the topmost stage and the remaining oven top 10.

4. 发明专利

JPH09174230A METHOD FOR LINING BED PART OF LADLE 失效
公开(公告)号：JPH09174230A
公开(公告)日：1997-07-08
申请号：JP34150195
申请日：1995-12-27
申请人： NIPPON KOKAN KK , SHINAGAWA REFRACTORIES CO
发明人： KATO HISAKI , HIRAGA NORIYUKI , YAMAGUCHI SHOICHI , NOSE MASAHIKO , KANASHIGE TOSHIHIKO , YAMANE KAZUYOSHI
IPC分类号： B22D41/02 , F27D1/16
摘要： PROBLEM TO BE SOLVED: To save the man-hour and the working time while restraining the cost required for lining the bed part of a ladle and prevent the occurrence of the intrusion of metal. SOLUTION: A refractory precast block 1 is manufactured and a structural body 10 pre-assembled into the shape of the bed part lining is carried into the ladle 11 to complete the lining for the bed part of the ladle. In order to restrain the cost of the refractory a precast block high in material grade is applied only to a part 4 in contact with molten metal. Therefore, a heavy work is remarkably reduced without increasing the cost of the ladle to greatly save the man-hour and the working time. Further, the service life of the ladle can be improved.

5. 发明专利

JPS61207505A BOTTOM BLOWING NOZZLE OF REFINING FURNACE FOR MOLTEN METAL 失效
公开(公告)号：JPS61207505A
公开(公告)日：1986-09-13
申请号：JP4851985
申请日：1985-03-12
申请人： NIPPON KOKAN KK
发明人： KOBAYASHI MOTONOBU , HIRAGA NORIYUKI , SHIRATANI YUSUKE , KURIYAMA SHINJI , KOBAYASHI HITOSHI , NIMURA YOUICHI , NAKANISHI HIROAKI
IPC分类号： C21C7/072 , C21C5/34 , C21C5/48
摘要： PURPOSE:To prevent bottom blowing nozzle bricks from being stripped and damaged by thermal stress and from being shortened in service life by forming the bottom blowing nozzles of a top and bottom blown converter in such a manner that all the through-holes for gas blowing of the nozzles are disposed at the vertexes of regular triangles. CONSTITUTION:Four pieces of the bottom blowing nozzles made of non-porous refractory bricks are attached to the top and bottom blown converter. Each nozzle is provided with the many through-holes H for gas blowing to the non- porous refractory brick A and is so formed that the all of the through-holes H for gas blowing are relatively positioned at the vertexes of the regular triangles. Since all the spaces between the through-holes H are of the same length, the stripping and damage of the non-porous refractories A as a result of the thermal stress generated by the difference in the spaces are obviated and the service life of the nozzles is extremely longer than the service life of the conventional nozzle having the through-holes for gas blowing arranged in the square configuration. The working efficiency of the converter is improved as well.

6. 发明专利

JPS54107404A SIDEWALL REPAIRMENT FOR MOLTEN METAL FLOWING AREA 失效
公开(公告)号：JPS54107404A
公开(公告)日：1979-08-23
申请号：JP1293178
申请日：1978-02-09
申请人： NIPPON KOKAN KK
发明人： HIRAGA NORIYUKI , TSURITANI ISAMU , OKAMOTO MITSUHIRO
IPC分类号： F27D1/16
摘要： PURPOSE:To lengthen the life of molten metal flowing area by quick repairment by the procedure in which damaged molten metal flowing area is blocked with a repairing frame and a sealant and then a flexible refractory is forced into a hole provided in the repairing frame. CONSTITUTION:In repairing molten metal flowing area, e.g., the damaged portion 15 of the duct of a vacuum degassing device, the repairing frame 1 the outside of which is provided with the sleeve refractory 3 is set up first and then the sealant 6 is set at the lower side of the duct. Then, the charging hole 2 leading to the charging pipe 8 is provided in the frame 1 through the elbow 7. Then, the flexible refractory 4 is forced into the hole through the charging pipe 8 and the charging hole 2.

7. 发明专利

JPH0387392A PARTITION WALL FOR PICKLING TANK 失效
公开(公告)号：JPH0387392A
公开(公告)日：1991-04-12
申请号：JP22160189
申请日：1989-08-30
申请人： NIPPON KOKAN KK
发明人： NISHI MASAAKI , MURAKAMI NOBORU , HIRAGA NORIYUKI
IPC分类号： C23G3/02
摘要： PURPOSE:To uniformize the wear of the pillow part and to prevent the generation of a sharp step by forming the pillow part of the partition wall for the pickling tank with an acid and wear-resistant brick member at the center and a soft member susceptible to wear on both sides. CONSTITUTION:The pickling tank 1 is separated by the partition wall 3 into plural baths 2, and a strip 6 is passed successively through the pickling soln. 7 in the bath 2 through the wall 3 and pickled. The wall 3 is formed with a supporting base 4 and a skid cap 5 at the pillow part in contact with the traveling strip 6. The skid cap 5 is formed from the brick member 8 excellent in resistance to acid and wear at the center and the soft member 9 more susceptible to the wear by the strip 6 than the brick member 8 on both sides. Consequently, the wear loss is practically uniformized at the center and both sides different in the passage frequency of the strip 6, a sharp step is hardly generated, and the cracking of the surface of the strip 6 is prevented.

8. 发明专利

JPS62205214A PRODUCTION OF GAS BLOWING PLUG 失效
公开(公告)号：JPS62205214A
公开(公告)日：1987-09-09
申请号：JP4661286
申请日：1986-03-04
申请人： NIPPON KOKAN KK
发明人： KOBAYASHI MOTONOBU , HIRAGA NORIYUKI , TAKAHASHI TATSUTO
IPC分类号： C21C5/48 , C21C7/072
摘要： PURPOSE:To easily produce a gas blowing porous plug by injecting gaseous nitrogen through holes from one side face of a metallic base plate formed with many holes, thermally spraying a refractory material with a thermal spraying burner into a receiving brick having a circular truncated cone shape provided on the opposite side face and solidifying said material. CONSTITUTION:One side of the metallic plate 20 such as steel plate having the many holes sized about 1mm in diameter is fixed by a gas supplying means 28 and the opposite side is fixed by the receiving brick 26 having the circular truncated cone shape 24 at the time of manufacturing the porous plug 10 for blowing an inert gas, gaseous oxygen, etc., into a molten metal. The inert gas such as N2 is injected from the surface of the means 28 through the holes 22 at a high flow rate of 50m/sec to the opposite side. The refractory material powder consisting of 80% MgO and 20% converter slag is thermally sprayed by the thermal spraying burner 30 into the circular truncated cone shape space 24 of the brick 26 and is laminated into the space 24. The porous plug 10 having the many vent holes 18 for ejection from the holes 22 into the space 24 of the brick 26 is easily produced.

9. 发明专利

JPS60264358A MAGNESIA CARBON NON-BURNT BRICK 失效
公开(公告)号：JPS60264358A
公开(公告)日：1985-12-27
申请号：JP11992484
申请日：1984-06-13
申请人： NIPPON KOKAN KK
发明人： NISHI MASAAKI , YANO KOUZOU , KATOU HISAKI , NIMURA YOUICHI , KURIYAMA SHINJI , SHIRATANI YUUSUKE , KATAYAMA HARUO , KOBAYASHI MOTONOBU , HIRAGA NORIYUKI
IPC分类号： C04B35/043 , C04B35/04

10. 发明专利

JPS59145718A Blowing method of gas in nozzle for refining molten metal 失效
标题翻译：用于精炼金属的喷嘴中的气体吹塑方法
公开(公告)号：JPS59145718A
公开(公告)日：1984-08-21
申请号：JP1962283
申请日：1983-02-10
申请人： Nippon Kokan Kk
发明人： HANMIYOU MASAYUKI , SHIRATANI YUUSUKE , HASEGAWA TERUYUKI , TANMURA YOUICHI , HIRAGA NORIYUKI , TAKAHASHI TATSUTO , KITANI FUKUICHI
IPC分类号： C21C5/48 , C21C5/35
CPC分类号： C21C5/35 , Y02P10/143
摘要： PURPOSE:To extend the service life of a bottom blowing tuyere and to reduce the cost of the gas used by using the gas contg. a large amt. of non-oxidative gas or reducing gas as the stirring gas to be blown from the bottom after the mid-period of combined blowing. CONSTITUTION:Gas contg. 40-100vol% non-oxidative gas such as Ar, N2 or the like and/or reducing gas such as CO, methane, propane or the like is used as the stirring gas to be blown after the mid-period of blowing in a combined blowing method wherein oxygen is top blown with an upper lance 7 to the molten iron 5 and slag 6 in a converter 1 consisting of a shell 2 and refractories 3 and the stirring gas is blown from the tuyere 4 in the bottom, whereby the wear of the tuyere 4 is suppressed while the cost of the stirring gas is taken into consideration and the service life of the tuyere is made at least equivalent to the life of the converter. It is further preferable for the decreased temp. of the tuyere 4 hence decreased wear thereof to increase the cooling capacity by blowing the stirring gas to be blown after the mid-period of blowing at a rate of 1-3 times the rate of blowing before the mid-period of blowing.
摘要翻译：目的：延长底吹风口的使用寿命，降低使用气体的气体成本。一个大的的非氧化性气体或还原气体作为从组合吹制的中期后期从底部吹出的搅拌气体。构成：气体使用40-100vol％的非氧化性气体如Ar，N 2等和/或诸如CO，甲烷，丙烷等的还原气体作为在组合的中期吹入之后被吹送的搅拌气体吹出方法，其中用顶部喷枪将氧气顶吹到铁水5和由壳体2和耐火材料3组成的转炉1中的炉渣6，搅拌气体从底部的风口4吹出，在考虑搅拌气体的成本的同时抑制风口4，并且使风口的使用寿命至少等于转炉的使用寿命。进一步优选降低温度。因此风口4的磨损降低，从而通过在吹制中期之前以吹送速率的1-3倍的速度吹入吹送搅拌气体来提高冷却能力。

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