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1. 发明专利

JPH06100912A LANCE FOR BLOWING POWDERY FUEL FOR BLAST FURNACE 失效
公开(公告)号：JPH06100912A
公开(公告)日：1994-04-12
申请号：JP27784992
申请日：1992-09-22
申请人： KAWASAKI STEEL CO
发明人： MATSUI TAKASHI , KOKUBU HARUO , SENOO YOSHIKAZU
IPC分类号： C21B7/00
摘要： PURPOSE:To prevent the erosion of the tip part of a lance and to improve the combustion ratio of fine coal by suitably positioning the tip part of an inner pipe to the inner side from the tip part of an outer pipe in a double pipe lance for blowing fuel into a blow pipe for blowing hot blast. CONSTITUTION:This powdery fuel blowing lance composed of the double pipe lance is arranged penetrating the wall of the blow pipe for blowing the hot blasting connected with a tuyere in a blast furnace. The fine coal gas-carried from the inner pipe 8 in this double pipe lance is injected with oxygen or oxygen-enriched air from the outer pipe 9. Then the tip part of the inner pipe 8 is drawn into the inner side from the tip part of the outer pipe 9 by 15-105mm. By this method, the mixing of the fine coal with the oxygen is promoted and the combustion rate is improved, and also, the erosion of the tip part of the lance can be prevented.

2. 发明专利

JPH04346610A PULVERIZED COAL BLOWING LANCE FOR BLAST FURNACE 失效
公开(公告)号：JPH04346610A
公开(公告)日：1992-12-02
申请号：JP11715191
申请日：1991-05-22
申请人： KAWASAKI STEEL CO
发明人： MISAO MASAHIRO , KOKUBU HARUO
IPC分类号： C21B5/00 , C21B7/00
摘要： PURPOSE:To improve the combustion efficiency of the air-floated pulverized coal injected from a double-pipe lance projecting into a plow pipe for supplying hot air to a blast furnace or into a tuyere. CONSTITUTION:A female screw 5 is cut inside a mounting seat 4 provided at the top of a double-pipe lance 3. Four U-shaped notches 6 are formed on the periphery of the tip of a coupling 8. A diffuser 7 having a conical base is furnished at the center in the coupling. A male screw 9 cut outside the coupling 8 is freely detachably fixed to the female screw 5 of the seat 4. The air-floated pulverized coal flowing in the inner pipe 1 is mixed with a cooling gas supplied from the outer pipe 2, the mixture is collided with the conical base of the diffuser 7, a part is passed through the notch 6 and diffused, the remainder travels rectilinearly along the coupling 8 and is diffused, and hence the combustion efficiency is improved.

3. 发明专利

JPH0474812A DEVICE FOR CHARGING COKE INTO FURNACE CORE PART IN BELL TYPE BLAST FURNACE 失效
公开(公告)号：JPH0474812A
公开(公告)日：1992-03-10
申请号：JP18713290
申请日：1990-07-17
申请人： KAWASAKI STEEL CO
发明人： YASUKAWA AKIO , MATSUO HIDEO , KIGUCHI MITSURU , KOKUBU HARUO
IPC分类号： C21B5/00
摘要： PURPOSE:To easily charge coke into furnace core part with simple device by receiving the coke dropped from opening hole at upper face into a box type chute inclined downward and come to the furnace core part in furnace space part and discharging this from a discharging opening hole at the tip part thereof. CONSTITUTION:The box type chute 5 is inclined downward to inner part in the furnace from out of iron shell 1 in furnace top below a large bell 3 and fixed to the iron shell 1 in the furnace top so as to face the furnace core part in the furnace space part. The coke receiving opening hole 7 corresponding to locus position of the coke 20 dropped from the large bell 3 is arranged at upper part of the chute, and also by opening the tip part thereof, the coke discharging hole 8 is arranged. Further, a chute upper cover 9 is arranged as slidable to the longitudinal direction so as to cover the upper face of box type chute 5 and in this, an opening hole 10 and a gate 11 at tip part, are arranged. An expanding/contracting driving device 15 for shifting this chute upper cover 9 to radius direction of the furnace, is connected. By this method, a part of the coke 20 dropped from the large bell 3 is received in the chute 5 from the above opening hole 10 and charged into the core part and coke layer can be formed.

4. 发明专利

JPH03264611A METHOD FOR DESULFURIZING MOLTEN IRON 失效
公开(公告)号：JPH03264611A
公开(公告)日：1991-11-25
申请号：JP6104590
申请日：1990-03-14
申请人： KAWASAKI STEEL CO
发明人： NAKATO SAN , KOKUBU HARUO , NOZAKI TSUTOMU
IPC分类号： C21B3/04
摘要： PURPOSE:To reduce erosion of refractory and to efficiently execute desulfurizing treatment by injecting CaO and CaCO3 into molten iron flow just after tapping the molten iron and giving this mixed flow the rotating stir. CONSTITUTION:The molten iron 1 just after being tapped from a blast furnace is removed with slag 8 with a skimmer 7 on an iron tapping trough and introduced into a desulfurizing reaction vessel 2. While injecting powders 9 of CaO and CaCO3 as the desulfurizing agent by using a lance 3, the molten metal 1 is rotated and stirred by using a rotary electromagnetic stirring device 4 to execute a desulfurizing reaction and the produced slag 5 is separated. As temp. drop of the molten iron is little with molten iron pretreatment at furnace bed, the rates of desulfurization and desiliconization are made to fast, and reaction efficiencies of desulfurizing agent and desiliconizing agent are improved.

5. 发明专利

JPH01172531A PRODUCTION OF REDUCED CHROMIUM ORE PELLET 失效
公开(公告)号：JPH01172531A
公开(公告)日：1989-07-07
申请号：JP32748187
申请日：1987-12-25
申请人： KAWASAKI STEEL CO , KAWATETSU MINING
发明人： INATANI TOSHIHIRO , KOKUBU HARUO , KOBAYASHI KATSUHIDE , FUKAMIZU KATSUYOSHI , YAMADA TEIICHI , KASASHIMA NOBUTAKE
IPC分类号： C22B1/16
摘要： PURPOSE:To improve the reduction ratio without increasing blending quantity of carbonic material in charge by mixing fine grain and coarse grain green pellets, which are separately pelletized with the pelletizer as the blending raw material, and reducing them in a rotary skin through a preheater. CONSTITUTION:The blending raw material composing of fine granular chromium ore, carbonic material and binder is pelletized with the disk pelletizer 1 to obtain the fine grain green pellet. On the other hand, the charging carbonic material is mixed into the above blending raw material with a mixer 22 and pelletized with the disk pelletizer 23 to obtain the raw grain green containing much carbonic material ratio. The coarse grain pellet is mixed with the fine grain pellet at 10-30wt.% of the whole pellets and charged into the rotary kiln 4 through the preheater 2 and heated and reduced with a burner 6. In there, the segregated coarse grain pellet 24 protects the fine grain pellet 25 under weak acidic atmosphere 27 from strong acidic atmosphere 26. By this method, while preventing the carbon loss, the uniform reduction ratio is obtd. as the whole. The reduced chromium ore obtd. in there is taken out from the cooler 5.

6. 发明专利

JPS63130728A METHOD FOR REDUCING CHROMIUM ORE PELLET AND PELLET 失效
公开(公告)号：JPS63130728A
公开(公告)日：1988-06-02
申请号：JP27804686
申请日：1986-11-21
申请人： KAWASAKI STEEL CO , KAWATETSU KOGYO KK
发明人： FUKAMIZU KATSUYOSHI , KOKUBU HARUO , INATANI TOSHIHIRO , KOBAYASHI KATSUHIDE , YAMADA TEIICHI , KASASHIMA NOBUTAKE
IPC分类号： C22B1/16 , C22B34/32
摘要： PURPOSE:To prevent dissipation of S into an exhaust gas and to improve pellet strength by fixing the S contained in the pellets into the pellets by using CaO at the time of reducing the chromium ore pellets in a rotary kiln. CONSTITUTION:The S contained in the pellets is discharged as SOx to provide a cause for environmental pollution at the time of adding a reducing agent, binder, etc., to the chromium ore powder, pelletizing the mixture and reducing the pellets in the rotary kiln. The CaO of the amt. 1-30 times the amt. necessary for fixing the S contained in the pellets is, therefore, added to the pellets at the time of pelletizing the above-mentioned powder. The S is thereby fixed in the pellets without being dissipated into the exhaust gas, the strength of the pellets is improved, the use of bentonite is decreased and the reducibility is improved.

7. 发明专利

JPS58157905A METHOD FOR CHARGING RAW MATERIAL IN BLAST FURNACE 失效
公开(公告)号：JPS58157905A
公开(公告)日：1983-09-20
申请号：JP4024982
申请日：1982-03-16
申请人： KAWASAKI STEEL CO
发明人： OKUMURA KAZUO , KATOU AKIRA , KOKUBU HARUO , SASAKI AKIRA
IPC分类号： C21B5/00
摘要： PURPOSE:To enable the use of a large amt. of pellets without giving adverse influence on the operation of a blast furnace by mixing the pellets beforehand uniformly with sintered ore within a range of specific ratio, charging the same into the blast furnace and operating the blast furnace. CONSTITUTION:Two systems of belt conveyors 18, 18 are installed over an ore storage tank 17. Sintered ore 11 and pellets 12 are carried by said conveyors simultaneously into said tank, where both materials are mixed uniformly to prepare the raw materials to be charged into a blast furnace. These raw materials are supplied through the conveyor 18, an intermediate hopper 13 and the conveyor 18 into a charger 16 for blast furnace materials provided with a small bell 14 from a swiveling chute 15. The mixing ratio of the ore 11 and the pellets 11 is kept within the range wherein the amt. occupied by the pellets 12 in the total amt. of both is 25-50wt%. The mixing ratio is controlled by changing the speeds of the conveyors 18, the weights of the raw materials to be transported, the positions of the conveyor heads, etc.

8. 发明专利

JPS58151431A OPERATING METHOD OF SINTER MACHINE 失效
公开(公告)号：JPS58151431A
公开(公告)日：1983-09-08
申请号：JP3202482
申请日：1982-03-01
申请人： KAWASAKI STEEL CO
发明人： KOKUBU HARUO , WATANABE MINORU , MIKI KATSUYUKI , SASAKI AKIRA
IPC分类号： C22B1/20
摘要： PURPOSE:To stabilize the quality of sintered ores adequately in a sinter machine belonging to Dwight-Lloyd type, by controlling the operation thereof in accordance with the min. wind velocity position of the distributions of the suction wind velocities in the longitudinal direction and pallet speeds. CONSTITUTION:Powdery ores are packed continuously at desired density on pallets which are transferred continuously in the longitudinal direction with a conveyor. The pallets are conducted into an ignition furnace and during the passage therein, the ores are fired. Suction wind is passed through the fired powdery ores from above to below and while the ores are transferred, the front line of combustin is advanced from the upper to lower layers so that the ores are sintered successively. The velocity of suction wind in this case changes in the state of the sintered layers and has the characteristic that the velocity exhibits a min. value in the position of a distance L from the firing point O as shown in the figure. The distance L is determined and the value L/PS is determined by dividing the same by a pallet speed PS. This value and a strength index SI of the sintered ores have the positive correlation as shown in the figure; therefore, if the operation is so controlled as to maintain the L/PS within a desired range, the quality of the sintered ores is stabilized.

9. 发明专利

JPS58115288A CUT-OFF PLATE FOR DL SINTERING MACHINE 失效
公开(公告)号：JPS58115288A
公开(公告)日：1983-07-08
申请号：JP21352781
申请日：1981-12-28
申请人： KAWASAKI STEEL CO
发明人： KOKUBU HARUO
IPC分类号： F27B21/10 , F27B21/06

10. 发明专利

JPH09143518A PRODUCTION OF LOW SILICON PIG IRON AT THE TIME OF REDUCING PRODUCTION IN BLAST FURNACE 失效
公开(公告)号：JPH09143518A
公开(公告)日：1997-06-03
申请号：JP30412695
申请日：1995-11-22
申请人： KAWASAKI STEEL CO
发明人： KOKUBU HARUO
IPC分类号： C21B5/00
摘要： PROBLEM TO BE SOLVED: To produce a low Si pig iron without rising the Si content in molten iron, at the time of executing the reducing production temporarily reducing iron tapping quantity during the stationary operation in a blast furnace. SOLUTION: Blasting quantity blown into the furnace from tuyeres 4 of the blast furnace 1 is kept constant without changing the blasting quantity during the stationary operation, or reversely, by executing increase of the blasting quantity, and also, an operation reducing oxygen quantity in the blasting according to the reducing production ratio of the molten iron. By this method, the blasting quantity blown from the tuyeres 4 is kept to at least a level at the time of the stationary operation. Since the blasting quantity blown into the furnace from the tuyeres 4 in the blast furnace 1 is kept to the same quantity or above of that during the stationary operation even in the case of reducing the production, it is prevented that the depth of raceways formed in the furnace becomes shallow, and dripping speed of molten iron can be kept equally to that during the stationary operation. As a result, the generation of SiO gas transforming zone is restrained and also Si transforming reaction into the molten iron is restrained and the low Si pig iron can be produced.

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