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41. 发明专利

JP2000095547A PRODUCTION OF HARD WATER-GRANULATED SLAG 失效
公开(公告)号：JP2000095547A
公开(公告)日：2000-04-04
申请号：JP27075298
申请日：1998-09-25
申请人： NIPPON STEEL CORP
发明人： IDE HIDEO , KANEMATSU KINJI
IPC分类号： C04B5/06
摘要： PROBLEM TO BE SOLVED: To produce hard water-granulated slag suitable for fine aggregate for concrete.mortar or the like by using a conventional front-furnace water- granulating equipment and at a low cost. SOLUTION: When molten blast furnace slag is water-granulated, a substance containing binding water is added in an amount of 1-5 wt.% based on the total weight of the molten blast furnace slag and the substance to be added, and then, the mixture is water-granulated. Thereby, the binding water is released from the substance containing binding water due to heat and reacts with nitrogen contained in the slag in the molten state. By this reaction, nitrogen is removed from the slag. Accordingly, as the amount of nitrogen solubilized in the slag, which becomes a source of the foaming reaction in the slag at the time of water-granulation, can be reduced, dense water-granulated slag can be produced.

42. 发明专利

JPH11292588A METHOD FOR REDUCING WATER ABSORPTIVITY OF BLAST FURNACE SLOWLY COOLED SLAG 失效
公开(公告)号：JPH11292588A
公开(公告)日：1999-10-26
申请号：JP11007898
申请日：1998-04-07
申请人： NIPPON STEEL CORP
发明人： IDE HIDEO , KANEMATSU KINJI
IPC分类号： B09B5/00 , C04B5/00 , C04B18/02 , C04B18/14 , C04B40/00
摘要： PROBLEM TO BE SOLVED: To produce a slowly cooled blast furnace slag at a low cost which has low water absorptivity and which is suitable for a coarse aggregate of a concrete. SOLUTION: After a slowly cooled blast furnace slag is pulverized, the slag is mixed with water and cement by 5000:(500 to 2500):(10 to 50) ratio of slag: water:cement, and aged for one or more days. After ageing, a procedure to further mix water and cement and to age may be repeated once or more times. Thereby, the cement deposits on the slag surface to cause hydration reaction to form a cement gel, which seals open pores to decrease the water absorptivity.

43. 发明专利

JPH09279260A METHOD FOR AGGLOMERATING IRON ORE 失效
公开(公告)号：JPH09279260A
公开(公告)日：1997-10-28
申请号：JP11717996
申请日：1996-04-16
申请人： NIPPON STEEL CORP
发明人： IDE HIDEO , NAKANO MASANORI
IPC分类号： C22B1/16
摘要： PROBLEM TO BE SOLVED: To improve the thermal efficiency required for agglomeration and to decrease the amt. of blast furnace raw materials by mixing high-water-of- crystallization powdery iron are with converter slag in a molten state and forming easily disintegratable slag bond lumps by utilizing the dehydration behavior of the iron ore. SOLUTION: The iron ore 4 contg. >=5% water of crystallization is charged form mid-way of a downflow through 3 to a slug pit 2 of the converter slag 1 in the molten state and is agglomerated. The cooled agglomerate ore 7 is delivered by a shovel car 5, etc., and is used as a part of the blast furnace raw materials. At this time, the mixing ratio of the powdery iron ore and the slag is so set as to satisfy the conditions of the equation. The powdery high- water-of-crystallization iron ore includes pellet feeds of a diameter of =5% of the water of crystallization. The slag having basicit of about 2 to 4 is used.

44. 发明专利

JPH0826791A METHOD FOR REFORMING STAINLESS STEEL SLAG 失效
公开(公告)号：JPH0826791A
公开(公告)日：1996-01-30
申请号：JP16371194
申请日：1994-07-15
申请人： NIPPON STEEL CORP
发明人： IDE HIDEO
IPC分类号： C04B5/06 , C21C5/36 , C22B7/04 , C22B34/32
摘要： PURPOSE:To surely prevent the powdering of a stainless steel slag with an inexpensive method and to cycle chromium by adding aluminum ash and a siliceous material to the molten stainless steel slag and then discharging the mixture into a ladle. CONSTITUTION:Aluminum ash by 1-30wt.%, based on the total weight after adding, and 1-20wt.% siliceous material are added to the molten stainless steel slag before being discharged from a converter or an electric furnace, and the mixture is discharged into a ladle to reform the slag. By this method, the slag and reforming material are uniformly mixed at a low cost without using an injection equipment, and the slag is not powdered. Accordingly, the reformed slag with the grain size adjusted is utilized as road material, construction material, etc. Besides, the treated slag has a chemical composition similar to that of blast-furnace slag, and the slag is used as the raw material for cement like the blast-furnace slag.

45. 发明专利

JPH073345A METHOD FOR RECOVERING VALUABLE COMPONENT FROM STEELMAKING SLAG 失效
公开(公告)号：JPH073345A
公开(公告)日：1995-01-06
申请号：JP14500793
申请日：1993-06-16
申请人： NIPPON STEEL CORP
发明人： IDE HIDEO
IPC分类号： C21C5/28 , C22B7/04 , F27D15/00
摘要： PURPOSE:To reutilize a steelmaking slag as the lime or phosphorus source by dephosphorizing the slag. CONSTITUTION:A steelmaking slag is mixed with an iron oxide source and/or a carbon source so that phosphorus pentoxide: free iron oxide: carbon =1:0.5 to 15:0.5 to 5 in weight ratio, and the mixture is burnt at 1100-1300 deg.C in a nonoxidizing atmosphere, cooled and magnetically separated. The separated magnetic material consists essentially of iron phosphide. The iron phosphate is utilized as a rust inhibiting coating extender, catalyst or a substitute for phosphate rock. The phosphorus pentoxide concn. is remarkably lowered in the nonmagnetic material, and the nonmagnetic material is usable as the steel material. Consequently, the slag is dephosphorized almost without being melted, the refractory of a treating furnace is hardly eroded, and the service life of the furnace is prolonged.

46. 发明专利

JPH0627037B2 失效
公开(公告)号：JPH0627037B2
公开(公告)日：1994-04-13
申请号：JP30982388
申请日：1988-12-09
申请人： NIPPON STEEL CORP
发明人： NAKANO TAKETO , IDE HIDEO , NOSE TETSUO , MATSUBAYASHI SHIGEHARU
IPC分类号： B21C3/02 , C04B35/58 , C04B35/599

47. 发明专利

JPS6340630B2 失效
公开(公告)号：JPS6340630B2
公开(公告)日：1988-08-11
申请号：JP21435584
申请日：1984-10-15
申请人： NIPPON STEEL CORP
发明人： FUKUOKA HIROMI , ASANO KEISUKE , IDE HIDEO
IPC分类号： B22D11/06

48. 发明专利

JPS63112457A REFRACTORIES FOR MOLTEN METAL 失效
公开(公告)号：JPS63112457A
公开(公告)日：1988-05-17
申请号：JP25687686
申请日：1986-10-30
申请人： NIPPON STEEL CORP
发明人： ASANO KEISUKE , IDE HIDEO
IPC分类号： C04B35/16 , C04B35/48

49. 发明专利

JPS6353485A DETECTOR OF MELT INVADING REFRACTORY AND LINING SURFACE POSITION FOR FURNACE CONTAINER 失效
公开(公告)号：JPS6353485A
公开(公告)日：1988-03-07
申请号：JP19862886
申请日：1986-08-25
申请人： NIPPON STEEL CORP
发明人： ASANO KEISUKE , IDE HIDEO , SUZUKI HAJIME
IPC分类号： G01B7/00 , G01V3/10 , G01V3/11
摘要： PURPOSE:To enable the non-destructive detection of an invading melt and a lining thickness to be performed by opposing two sensor heads each composed of a distance detector, a coil wherein a high frequency current flows and a coil for producing an induced voltage to the side wall and the bottom of a lining refractory and converting the induced voltage to a ground metal information signal while revolving the sensor heads. CONSTITUTION:The peripheral surface of a ladle iron plate 18 lined by a refractory 19 is encircled by struts 17 having a rail 8 on their tops and a vertically moving arm 2 having a driving device 3 on its top end is vertically mounted to a turning bar 6 that turns on the rail 8. Sensor heads 1a and 1b which are opposed to the side wall and the bottom of the refractory 19, respectively, are provided on the lower end of the arm 2. Each sensor 1a or 1b is constituted by a distance detector 26 composed of a distance detecting rod 21, a coil wherein high frequency current flows and a coil for producing an induced voltage. A detector is thus constituted, the positions of the heads 1a and 1b are moved, the induced voltage is converted to electric signals and the presence of a melt 20 that has invaded into the refractory 19 and a reduction in the thickness of the refractory 19 are detected.

50. 发明专利

JPS639905B2 失效
公开(公告)号：JPS639905B2
公开(公告)日：1988-03-02
申请号：JP9900383
申请日：1983-06-03
申请人： NIPPON STEEL CORP
发明人： NARITA NOBUHIKO , FUKUOKA HIROMI , IDE HIDEO
IPC分类号： B22D11/10 , B22D41/60

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