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31. 发明专利

JPH05311216A 失效
公开(公告)号：JPH05311216A
公开(公告)日：1993-11-22
申请号：JP11294592
申请日：1992-05-06
申请人： NIPPON KOKAN KK
发明人： IINO BUNGO , HATTORI MICHINORI , ITO HARUO , SHIMOMURA AKIO
IPC分类号： C21B5/00
摘要： PURPOSE:To enable the improvement of an operational result by reducing blasting quantity of hot blast when difference between blasting pressure and gas pressure exceeds the upper and the lower limits of the allowable value. CONSTITUTION:The blasting pressure of the hot blast blasted to a blast furnace 5 from a hot stove 1 and the pressure of the gas at the furnace top of the blast furnace 5 are measured by pressure gauges 4, 7, respectively. Signals of the blasting pressure and the gas pressure are transmitted to a furnace pressure loss computing element 8 and the pressure difference is calculated. When the pressure difference exceeds the upper limit or the lower limit of the allowable value, by using a blasting quantity controller 11, the blasting quantity of a blower 10 and the opening degree of a blasting value 12 are controlled to reduce the blasting quantity of the hot blast. By this method, the furnace condition in the blast furnace is stabilized and serious trouble can be prevented.

32. 发明专利

JPH05222414A METHOD FOR OPERATING BLAST FURNACE 失效
公开(公告)号：JPH05222414A
公开(公告)日：1993-08-31
申请号：JP2799792
申请日：1992-02-14
申请人： NIPPON KOKAN KK
发明人： NAKAJIMA RYUICHI , HATTORI MICHINORI , IINO BUNGO , SHIMOMURA AKIO , SHIOBARA MASAYUKI
IPC分类号： C21B5/00
摘要： PURPOSE:To reduce an inclining angle of a coke layer and the variation of Lo/Lc in the radial direction and to stabilize the furnace condition by charging coke into the furnace from all positions of the peripheral part to the center part in the furnace at the time of charging the coke into the furnace from the top part of the blast furnace. CONSTITUTION:The coke and iron ore are successively charged from fixed hoppers 2, 3 on the top part 1 of the blast furnace through a swinging chute 4 to laminate a coke layer 5 and an iron ore layer 6. In this case, with respect to the radial direction in the furnace at the furnace top part 1, if the center part is taken as 0.0 and the peripheral part as 1.0 in the dimensionless radius, the coke is charged from the whole position of 0.0-1.0 to restrain the occurrence of flowing-down of the coke layer 5. By this method, the variation of Lo/Lc (Lo: layer thickness of the iron ore layer, L: layer thickness of the coke layer) is reduced and the occurrence of an abnormal point (a) is prevented, and repeatability of charging distribution is secured.

33. 发明专利

JPH0598322A METHOD FOR CONTROLLING GRAIN SIZE OF CHARGING MATERIAL INTO BLAST FURNACE 失效
公开(公告)号：JPH0598322A
公开(公告)日：1993-04-20
申请号：JP25547391
申请日：1991-10-02
申请人： NIPPON KOKAN KK
发明人： SHIMOMURA AKIO , HATTORI MICHINORI , IINO BUNGO , SASAKI WATARU
IPC分类号： C21B5/00 , G01N15/02
摘要： PURPOSE:To provide a screen for recovering furnace condition by quickly chang ing the average grain size of cokes under malfunctioning furnace condition. CONSTITUTION:The charging material 6 on a charging conveyor 4 in a blast furnace is photographed with a TV camera 7, and grain size is analyzed by a picture processor 8, and the average grain size of the charging material is obtd. by a computing element 9 and the difference between the grain size thereof and the setting grain size is found and changing rate of the size of a sieve is found so that the difference is zero to control the size of the sieve changeable sieve 10 below a raw material vessel 1. By this method, as the average grain size of the charged material can be controlled in the condition having little variety, the furnace condition is stabilized and the iron tapping rate is increased and a coke ratio is reduced.

34. 发明专利

JPH0596242A MESH SIZE VARIABLE SCREEN 失效
公开(公告)号：JPH0596242A
公开(公告)日：1993-04-20
申请号：JP25547291
申请日：1991-10-02
申请人： NIPPON KOKAN KK
发明人： SHIMOMURA AKIO , HATTORI MICHINORI , IINO BUNGO , NISHIMURA YUJI
IPC分类号： B07B1/12 , B07B1/46 , C21B5/00
摘要： PURPOSE:To provide a mesh size variable screen capable of rapidly altering the mean particle size of coke lumps in matching relation to the state of a furnace. CONSTITUTION:A mesh size variable screen for screening granular and lumpy matter having screen openings formed thereto by arranging a large number of screen rods side by side so as to provide intervals therebetween consists of screen rods 12 having an oval cross section and supported at both ends thereof by shafts and revolving means revolving the screen rods 12 around the axes thereof. One of the revolving means consists of the pinions 14 provided to the end parts of the screen rods 12 and the rack 15 arranged so as to be movable in the direction becoming right-angled to the axial direction of the screen rods 12. Therefore, the dimension of screen openings can be continuously and mechanically altered and the particle size of coke can be altered at any time corresponding to the change of the state of a blast furnace and the state of the furnace can be restored within a short time.

35. 发明专利

JPH04301039A DEVICE FOR CONTROLLING CHARGE OF RAW MATERIAL IN SINTERING MACHINE 失效
公开(公告)号：JPH04301039A
公开(公告)日：1992-10-23
申请号：JP6613591
申请日：1991-03-29
申请人： NIPPON KOKAN KK
发明人： IINO BUNGO , MATSUNAGA YOSHIFUMI , WADA TAKASHI
IPC分类号： C22B1/20 , C22B1/16
摘要： PURPOSE:To provide the title device for uniformizing unevenness of permeability of sintering raw material layer developed in longitudinal direction of the machine due to landslipping phenomenon. CONSTITUTION:The device is composed of a TV camera 21 for taking picture of landslip developing part in charging part of the sintering raw material into pallet 4 in the sintering machine and a computing element 25 obtaining the landslipping quantity (x) and slipping period (n) by treating picture signal of the TV camera and corrected number of revolutions R0 of roll feeder from the actual number of revolutions R1 of roll feeder and delay time (d) and transferring the signal to driving part of the roll feeder. As the landslipping phenomenon is reduced and the permeability of sintering raw material layer in the longitudinal direction of machine is uniformized, the yield and the quality of sintered ore are improved.

36. 发明专利

JPH04268031A APPARATUS FOR DETECTING FALL-DOWN OF GRATE BAR IN SINTERING MACHINE 失效
公开(公告)号：JPH04268031A
公开(公告)日：1992-09-24
申请号：JP2899091
申请日：1991-02-25
申请人： NIPPON KOKAN KK
发明人： IINO BUNGO , MATSUNAGA YOSHIFUMI , WADA TAKASHI
IPC分类号： C22B1/20 , C22B1/16 , F27B21/02
摘要： PURPOSE:To automatically and accurately detect fall-down of a grate bar. CONSTITUTION:Slit-type optical flux (slit beam) irradiates toward surface of a sintering bed from a projector 6 set at side and upper parts of pallet 1 to form a band-like irradiating part 7 crossing at the right angle to the advancing direction of the pallet 1 on surface of the sintering bed. A TV camera 8 set at an upper part of the sintering bed takes picture of the irradiating part 7 and the picture signal is transmitted to a computing element 9. The computing element 9 analyzes the picture signal to obtain opening hole length, and when the obtd. length exceeds the reference length, an alarm signal is transmitted to an alarm 10. The alarm 10 gives alarm sound to inform the fall-down of a grate bar to an operator. The detecting accuracy for the fall-down of the grate bar is improved, and supplement at the fall-down position at early time can be executed and leakage of blasting is reduced and the yield is improved.

37. 发明专利

JPH03223409A DEVICE FOR PREDICTING RESIDUAL AMOUNT OF SLAG OF BLAST FURNACE 失效
公开(公告)号：JPH03223409A
公开(公告)日：1991-10-02
申请号：JP1705890
申请日：1990-01-26
申请人： NIPPON KOKAN KK
发明人： NAKAJIMA RYUICHI , IINO BUNGO , ITO HARUO , SHIOBARA MASAYUKI
IPC分类号： C21B5/00
摘要： PURPOSE:To predict the amt. of residual slag at high frequencies and to prevent the degradation in a furnace condition by calculating the predetermined amt. of the formed slag from the number of raw material charging times per the past unit time and the amt. of the formed slat per charge and finding the difference between this amt. and the actual amt. of the tapped slag. CONSTITUTION:The weight of the received slag in a slag ladie is measured and transmitted by a means 1 for measuring the amt. of the received slag in a blast furnace operation. The amt. of granulated slat is measured and transmitted by a means 2 for measuring the tapped amt. of granulated slag. Further, the total number of the charging times of the main raw materials for the past specified time taking the change in an air quantity and fuel ratio into consideration is calculated and transmitted by a 1st computing element 3. The amt. of the formed slag per charge is calculated from the average number of the charging times per hour of the main raw materials, the weight of the main raw materials per charge and the slag component thereof, and the predetermined amt. of the formed slag per hour is found by multiplying these values in a 2nd computing element 4 inputted with these transmitted transmitted signals. Further, the actual amt. of the tapped slag hour is calculated in accordance with the respective input signals mentioned above. The predicted amt. of the residual slag per hour is calculated from the difference between the predetermined amt. of the formed slag and the actual amt. of the tapped slag mentioned above and is displayed on a CRT display 5.

38. 发明专利

JPH03202409A METHOD FOR DRYING INNER WALL IN BLAST FURNACE 失效
公开(公告)号：JPH03202409A
公开(公告)日：1991-09-04
申请号：JP34186789
申请日：1989-12-29
申请人： NIPPON KOKAN KK
发明人： NAKAJIMA RYUICHI , IINO BUNGO , ITO HARUO , OKOCHI IWAO
IPC分类号： C21B7/06 , F26B9/00
摘要： PURPOSE:To efficiently dry a refractory brick side circumferential wall by arranging a temporary hot blast inducing circumferential wall as dividable to the refractory brick side circumferential wall constructed in the blast furnace through a interval part and ascending the hot blast blown from tuyeres through the interval part. CONSTITUTION:The refractory brick side circumferential wall 2 is constructed on the inner face of an iron shell 1 in the blast furnace and the temporary hot blast inducing circumferential wall 6, which can be removed from a furnace opening part 5 by dividing is provided at this circumferential wall 2 and the tuyeres 3 through the interval part 4. Then, at the time of using D for inner diameter of the refractory brick side circumferential wall and Do for inner diameter of the hot blast inducing passage circumferential wall, D/Do ratio is desirable to be about 0.6-0.9. In this constitution, the hot blast is blown toward furnace bottom 10 direction from the tuyeres 3 and ascended through the interval part 4 to dry the refractory brick side circumferential wall 2. By this method, consumption of the hot blast is drastically reduced and the refractory brick side circumferential wall 2 is dried within few days.

39. 发明专利

JPH0353013A METHOD FOR CONTROLLING CHARGE OF BLAST FURNACE 失效
公开(公告)号：JPH0353013A
公开(公告)日：1991-03-07
申请号：JP18850789
申请日：1989-07-20
申请人： NIPPON KOKAN KK
发明人： SHIOBARA MASAYUKI , NAKAJIMA RYUICHI , IINO BUNGO , NEMOTO KENICHI
IPC分类号： C21B7/20
摘要： PURPOSE:To rapidly control the grain size distribution meeting the grain sizes of sintered ore by controlling the operation of a movable armor in accordance with the average grain size of the sintered ore obtd. by making arithmetic processing from the television camera image of the sintered ore on a feeder. CONSTITUTION:The sintered ore 6 is fed out of a sintered ore tank 1 and is charged via a conveyor 3 of the belt feeder 2 into a blast furnace 4. The sintered ore 6 on the above-mentioned feeder 2 is photographed by the television camera 7. The image signal obtd. in such a manner is sent to an image processor 8. The average grain size of the sintered ore 6 is computed. The computed value of the average grain size is sent to an arithmetic unit 9 in which the data on the relation between the average grain size of the sintered ore and the strength of the armor is previously inputted. The strength of the armor corresponding to the average grain size of the sintered ore 6 mentioned above is determined in accordance with the above-mentioned data. The operation of the movable armor is controlled via a driving device 10 by the result thereof. The raw material distribution on a stock line 5 meeting the grain size of the sintered ore after a change is obtd. with good responsiveness in this way and the stable furnace condition is maintained.

40. 发明专利

JPH0339408A CHARGING APPARATUS IN BLAST FURNACE 失效
公开(公告)号：JPH0339408A
公开(公告)日：1991-02-20
申请号：JP17367589
申请日：1989-07-05
申请人： NIPPON KOKAN KK
发明人： FURUYA SHIGEKI , NAKAJIMA RYUICHI , KISHIMOTO SUMIYUKI , IINO BUNGO , ITO HARUO
IPC分类号： C21B7/00
摘要： PURPOSE:To restrain powderization and flowing-down of raw material and also to facilitate charging distribution control by arranging a chute shiftable toward right and left directions and extendable/shrinkable in length at lower part of a discharging valve in lower hopper. CONSTITUTION:Charging raw material is so charged into a middle hopper 3 that the distribution thereof becomes uniform with a swinging chute 5 from an upper hopper 2 through a discharging valve 4. The discharging valve 4 in the upper hopper 2 and discharging valves 6, 7 in the middle hopper 3 are closed, and after pressurizing the middle hopper 3 to the furnace top pressure by operating a pressure equalizing valve 13 in a pressure equalizing pipe 12, the discharging valves 6, 7 are opened to charge the raw material into the lower hopper 8. The discharging valve 16 in the lower hopper 8 is made open state, and the raw material is continuously charged into upper face of stock line 11 in the furnace through cylindrical chutes 10. The chutes 10 are reciprocated so that the prescribed raw material distribution in the radius direction is obtained. In the case of vertically shifting the stock line 11, the chutes 10 are extended/shrunk to operate so that lower ends of the chutes 10 approach the upper face of stock line 11.

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