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61. 发明专利

JP2001208704A METHOD OF DETECTING FOREIGN MATTER OF USED PLASTIC, METHOD OF REMOVING FOREIGN MATTER, AND COMPRESSION PACKING METHOD 失效
公开(公告)号：JP2001208704A
公开(公告)日：2001-08-03
申请号：JP2000014863
申请日：2000-01-24
申请人： NIPPON STEEL CORP
发明人： IBARAKI TETSUJI , KONDO HIROTOSHI
IPC分类号： B09B3/00 , B07C5/34 , B09B5/00 , G01N23/04 , G01N23/18
摘要： PROBLEM TO BE SOLVED: To provide a technique related to the detection and removal of a foreign matter mixedly existing in a used plastic suited to recycling and a technique related to the compression of the used plastic. SOLUTION: The hard foreign matter mixedly existing in a used plastic is detected and removed by judging the presence of foreign matter on the basis of the transmitted X-ray data which is obtained by irradiating the used plastic with X-rays. A used plastic compression package reduced in the content of foreign matter is manufactured by compression packing of the used plastic from which the detected foreign mater is remove.

62. 发明专利

JP2001048603A PRODUCTION OF BLAST-FURNACE SLAG FINE AGGREGATE 失效
公开(公告)号：JP2001048603A
公开(公告)日：2001-02-20
申请号：JP22545599
申请日：1999-08-09
申请人： NIPPON STEEL CORP
发明人： IBARAKI TETSUJI , TODA YUJI , MAZAWA MASATO
IPC分类号： C04B5/00 , C21B3/06
摘要： PROBLEM TO BE SOLVED: To stably and economically produce blast-furnace slag fine aggregate for concrete/mortar by retaining slag that is discharged from a blast furnace and maintained in a fused state, in a slag holder at a specified temperature for a specified time, and then spraying jetted cooling water on the slag to quench it and to form water granulated slag. SOLUTION: This production process comprises retaining slag in a fused state in a slag holder having a >=5 m3 volume for >=15 min to adjust the slag temperature to 1,300-1,450 deg.C, and thereafter spraying jetted cooling water on the slag to quench it, and to form water granulated blast-furnace slag, wherein, before the fused slag is introduced into the slag holder, a powder containing >=3 mass % water of crystallization is mixed into the fused slag and, as the powder, e.g. powdery serpentinite capable of promoting release of nitrogen when mixed with the fused slag, is preferred; the amount of cooling water used is adjusted to mass >=7 times as much as that of the fused slag and the cooling water temperature is adjusted to

63. 发明专利

JP2000034138A APPARATUS FOR PRODUCING GRANULATED BLAST FURNACE SLAG AND ITS PRODUCTION 失效
公开(公告)号：JP2000034138A
公开(公告)日：2000-02-02
申请号：JP21201598
申请日：1998-07-13
申请人： NIPPON STEEL CORP
发明人： TODA YUJI , IBARAKI TETSUJI , MATSUMURA MASAAKI
IPC分类号： C04B5/02
摘要： PROBLEM TO BE SOLVED: To simply, efficiently and dividedly produce a heavy granulated blast furnace slag or a light granulated blast furnace slag, as necessary, when producing the granulated blast furnace slag. SOLUTION: A rotatable impeller 3 is installed just under an outlet of a molten slag spout 1 where a molten slag 2 flows and a blow nozzle 6 for jetting water in the same direction as the flow of the molten slag 2 is further provided under the impeller 3 in an apparatus for jetting pressurized water on the molten slag 2 discharged from a blast furnace and continuously producing a granulated blast furnace slag. The impeller 3 can be moved between a position just under the outlet of the molten slag spout 1 and a standby position. When the granulated blast furnace slag for a fine aggregate for a concrete is produced, the impeller 3 is moved to the position just under the outlet from the molten slag spout 1 to regulate the peripheral speed of the impeller 3 when the molten slag 2 is dropped onto the impeller 3 to 3-2,000 m/s. When the granulated blast furnace slag for a cement is produced, the impeller 3 is evacuated to the standby position to thereby dividedly produce the granulated blast furnace slag for the fine aggregate for the concrete and the granulated blast furnace slag for the cement.

64. 发明专利

JPH03177513A SMELTING REDUCTION METHOD FOR METAL AND SMELTING REDUCTION FURNACE 失效
公开(公告)号：JPH03177513A
公开(公告)日：1991-08-01
申请号：JP33326289
申请日：1989-12-22
申请人： NIPPON STEEL CORP
发明人： IBARAKI TETSUJI , YAMAUCHI MASAO , KANEMOTO MICHITAKA , MORIDERA HIROMITSU
IPC分类号： C21B11/02 , C21B11/00
摘要： PURPOSE:To simplify equipment and to improve reduction efficiency of iron ore in a pre-reduction furnace and secondary combustion ratio in a smelting reduction furnace by blowing powdery raw material into ascending gas stream within the specific range from the furnace wall at the time of blowing top- blowing oxygen. CONSTITUTION:In the smelting reduction furnace, at the time of blowing the top-blowing oxygen, the powdery raw material of powdery coal or powdery ore is blown into the ascending gas stream in the furnace within the range 1/3 to center direction from the furnace wall. It is desirable that grain size Dp of the blown coal is below either smaller one among 2mm in size or a value obtained from the equation. In the equation, V is gas flowing velocity (m/sec) in an exhaust gas duct. By this method, gas in the exhaust gas duct is reformed and high pre-reduction and the operation having high secondary combustion can be executed.

65. 发明专利

JPH03140405A SMELTING REDUCTION METHOD OF METAL 失效
公开(公告)号：JPH03140405A
公开(公告)日：1991-06-14
申请号：JP28045989
申请日：1989-10-27
申请人： NIPPON STEEL CORP
发明人： IBARAKI TETSUJI , YAMAUCHI MASAO , KANEMOTO MICHITAKA
IPC分类号： C21B11/02 , C21B11/00
摘要： PURPOSE:To produce molten iron from iron ore at a low cost by regulating stirring force to the molten iron with gas blowing from bottom blowing tuyeres and oxygen supplying pressure with a top blowing lance to the specific condition at the time of producing the molten iron from iron ore into a converter having the oxygen top blowing lance and the bottom blowing tuyeres. CONSTITUTION:The iron ore and coal as reducing agent are charged into a small quantity of molten iron 11 and molten slag 12 in the converter 1 having the oxygen top blowing lance 2 and plural bottom blowing tuyeres 3, and the gas is blown at the ratio of 70-450Nm /hr per one piece of the bottom blowing tuyere 3 in the normal state conversion to stir the molten iron 11 with the stirring force of 1-6kw/ton of molten iron. Further, the oxygen is injected from the top blowing lance 2 and the iron ore is melted and contained Fe2O3 is reduced into Fe with the coal in the molten slag 12 or C in the molten iron 11 to make the molten iron. In this case, the molten slag 12 quantity on surface of the molten iron 11 is made to >=1500kg/m and height of the lance 2 tip, stirring gas quantity from the tuyeres 3, oxygen supplying rate with the top blowing lance 2 and nozzle shape of the lance, are controlled so as to satisfy the inequality I between thickness L0 of the molten slag 12 and depth L of recessing part 21 in the molten slag 12 with oxygen supplying pressure from the top blowing lance 2 to produce the molten iron from the iron ore with the excellent productivity.

66. 发明专利

JPH01247517A METHOD FOR OPERATING SMELTING REDUCTION 失效
公开(公告)号：JPH01247517A
公开(公告)日：1989-10-03
申请号：JP7790488
申请日：1988-03-30
申请人： NIPPON STEEL CORP
发明人： YAMAUCHI MASAO , IBARAKI TETSUJI
IPC分类号： C21B11/02 , C21B11/00 , C21B13/00 , C21B13/02
摘要： PURPOSE:To stably maintain secondary combustion ratio to high and to prevent reoxidization of molten metal by specifying ratio of molten slag thickness in a furnace and dent depth on the slag formed with top blowing oxygen. CONSTITUTION:By top-blowing the oxygen gas to raw materials of ore, carbonic material, etc., charged in the smelting reduction furnace 1, the carbonic material is burnt, to reduce iron oxide. Then, the ratio Ls/Ls0 of the molten slag thickness Ls0 in the furnace and the dent depth Ls of the slag formed with the top blowing oxygen 8 is set to

67. 发明专利

JPH01247516A METHOD FOR SUPPLYING RAW MATERIAL IN SMELTING REDUCTION 失效
公开(公告)号：JPH01247516A
公开(公告)日：1989-10-03
申请号：JP7790388
申请日：1988-03-30
申请人： NIPPON STEEL CORP
发明人： YAMAUCHI MASAO , IBARAKI TETSUJI
IPC分类号： C21B11/02 , C21B11/00 , C21B13/00 , C21B13/02
摘要： PURPOSE:To supply powdery raw material into a furnace at high solid/gas ratio and good yield and to maintain reducing reaction velocity to high by blowing the powdery raw material toward slag surface together with carrier gas at the prescribed inclined angle. CONSTITUTION:A powdery raw material supplying device 7 is fitted to a furnace wall opening part 11 arranging to the furnace wall 10 in a smelling reduction furnace 1 and the powdery raw material is blown into the furnace together with the carrier gas. The blowing of the powdery raw material is executed so as to have the prescribed inclined angle to the stationary slag surface L. Blowing velocity at tip injecting hole 7a decided by the solid/gas ratio, supplying velocity and cross sectional area of the injecting hole 7a set with conveying characteristic of the powdery raw material. Height of the furnace wall opening part 11 and the blowing inclined angle are set so that the powdery raw material is blown toward the stationary slag surface L at the prescribed blowing angle from the furnace wall opening part 11. As the opening part 11 is positioned at the upper part from the molten slag, the stable furnace operation can be executed.

68. 发明专利

JPH01195221A METHOD FOR PREREDUCING ORE 失效
公开(公告)号：JPH01195221A
公开(公告)日：1989-08-07
申请号：JP1987588
申请日：1988-01-30
申请人： NIPPON STEEL CORP
发明人： YAMAUCHI MASAO , IBARAKI TETSUJI , KANEMOTO MICHITAKA , SAKAMOTO KATSUHIKO
IPC分类号： C21B11/00 , C21B13/00
摘要： PURPOSE:To reduce ore without interrupting the fluidization by exhaust gas and to decrease the unit requirements of carbonaceous material and oxygen by charging pulverized ore into a duct, reducing the ore while conveying under heating the ore by exhaust gas flotation, and charging the reduced ore into a melting and reducing furnace. CONSTITUTION:The ore 7 having grain diameter enough to be fluidized and floated by exhaust gas is charged into a duct 3 for conducting the exhaust gas generated in melting and reducing from a feed bunker 4 through a supply hole 4, floated and conveyed in the duct 3 by the high-temp. reducing exhaust gas, heated, and reduced. The reduced ore 7 is recovered in a collector 5, sent to the melting and reducing furnace 1 by a conveyor 8, and charged into the furnace 1 from the top or bottom. By this method, the ore 7 is prereduced without interrupting the fluidization by exhaust gas, and supplied into the furnace 1. Consequently, the productivity is not decreased, the sensible heat of the exhaust gas can be utilized, and hence the unit requirements of carbonaceous material and oxygen can be reduced.

69. 发明专利

JP2004255375A SOIL RESTORATION METHOD AND SOIL RESTORATION AGENT 审中-公开
公开(公告)号：JP2004255375A
公开(公告)日：2004-09-16
申请号：JP2004026159
申请日：2004-02-03
申请人： NIPPON STEEL CORP
发明人： IBARAKI TETSUJI , NAGAYA KOJI , YAMAMOTO MITSURU , IMURA SHOJI , IGAWA JUNJI , HAYASHI TAKANORI , KONDO SATOSHI
IPC分类号： A62D3/37 , A62D101/22 , A62D101/28 , A62D101/43 , B09C1/02 , B09C1/08 , C07B35/06 , C07C21/10 , C07D319/24 , A62D3/00
摘要： PROBLEM TO BE SOLVED: To provide a soil restoration method and to obtain a soil restoration agent for efficiently restoring soil contaminated with organic halogen compounds and hexavalent chromium by using iron particles. SOLUTION: Particles which are coated with ferrous oxide or ferrous hydroxide, contain iron in a large amount and have each a large specific surface area are mixed with water, thus iron powder is shielded from air and the resultant mixture is put in a container and is transported to a working site. On the working site, the mixture is mixed with earth and sand containing the contaminant, and thereby the soil contaminant is rendered harmless. COPYRIGHT: (C)2004,JPO&NCIPI

70. 发明专利

JP2004255373A METHOD FOR MANUFACTURING IRON POWDER FOR SOIL RESTORING AGENT 审中-公开
公开(公告)号：JP2004255373A
公开(公告)日：2004-09-16
申请号：JP2004020825
申请日：2004-01-29
申请人： NIPPON STEEL CORP
发明人： IBARAKI TETSUJI , NAGAYA KOJI , IGAWA JUNJI , IMURA SHOJI , HAYASHI TAKANORI
IPC分类号： B09B3/00 , B09C1/02 , B09C1/08 , C09K17/02 , C09K103/00
摘要： PROBLEM TO BE SOLVED: To provide a method for manufacturing a soil restoring agent of good quality from converter dust. SOLUTION: Iron-containing powder is separated from a converter gas by using a wet type dust collector 3 and precipitated/extracted in a settling tank 6 to obtain concentrated slurry. The concentrated slurry is transferred to a concentrated slurry tank 10 so that the powder concentration of the concentrated slurry is controlled to a suitable level for manufacturing the final product. The concentrated slurry having the powder concentration controlled in the tank 10 is recovered through a concentrated slurry recovering pipeline 13. The concentration of the oxygen dissolved in the slurry water to be used at least in the tank 10 and in its succeeding process is made to be ≤4 mg/liter. COPYRIGHT: (C)2004,JPO&NCIPI

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