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1. 发明专利

JPS5684423A OPERATING CONDITION DETERMINING METHOD FOR CONTINUOUS ANNEALING EQUIPMENT 失效
公开(公告)号：JPS5684423A
公开(公告)日：1981-07-09
申请号：JP16009579
申请日：1979-12-10
申请人： KAWASAKI STEEL CO , MITSUBISHI HEAVY IND LTD
发明人： NITOU TAKASHI , SATOU KUNIAKI , TAWARA KOUICHI , MUTOU SHINICHIROU , TAUCHI KUNIAKI , WATANABE MAKOTO
IPC分类号： C21D9/56 , C21D1/34 , C21D1/74 , C21D9/573 , C21D11/00
摘要： PURPOSE:To enhance the efficiency of continuous annealing of steel belts while preventing the generation of quenching effect due to cooling by adjusting the cooling rate or steel belts in the post-soaking first cooling zone, considering the quality of steel belts to be annealed. CONSTITUTION:A steel belt 8 is annealed in a continuous annealing oven having a heating zone 24, soaking zone 26, and first to third cooling zones 28, 30, 32. In this process, the total line speed is not determined by the maximum line speed common to the steel belt treatment, as the minimum value of maximum line speeds for the installation capacity and for the individual zone capacities except for the first cooling zone 28. Instead, the total line speed is determined from the maximum line speed of the first cooling zone 28, by dtermining its cooling condition from theoretical heat-transmission calculation, or experimental results, or both of them, so as to satisfy the cooling-rate allowance inherent to the quality of a steel belt to be annealed.

2. 发明专利

JPS5677342A METHOD OF CONTROLLING STRIP TEMPERATURE OF CONTINUOUS ANNEALING EQUIPMENT 失效
公开(公告)号：JPS5677342A
公开(公告)日：1981-06-25
申请号：JP15538879
申请日：1979-11-30
申请人： MITSUBISHI HEAVY IND LTD , KAWASAKI STEEL CO
发明人： HAYAMA YASUNOBU , TAUCHI KUNIAKI , FUKUSHIMA TAKEO , WATANABE MAKOTO , YAGISHIMA AKIYA , MUTOU SHINICHIROU
IPC分类号： C21D9/56 , C21D11/00
摘要： PURPOSE:To perform titled controlling with good accuracy by using the mean strip temp. value obtained by subtracting the fluctuation amounts owing to the changes in line speed, control unit and inlet strip temperatures from outlet strip temp. detected values. CONSTITUTION:The outlet strip temperatures of the heating zone 1, soaking zone 2, and cooling zones 3, 4 of continuous annealing equipment are detected with strip temp. detectors 8-11. The fluctuation amounts of the strip temp. owing to the changes in line speed, controlled variables of furnace and inlet strip temp. are calculated and the calculated fluctuation amount value is subtracted from the thus detected values. From the strip temperatures obtained in this way, the mean value thereof is calculated and the set value of the furnace is changed based in the deviation between this mean value and the target strip temp., whereby the strip temp. is controlled.

3. 发明专利

JPS5664626A TEMPERATURE MEASURING SYSTEM OF METALLIC MATERIAL 失效
公开(公告)号：JPS5664626A
公开(公告)日：1981-06-01
申请号：JP14099679
申请日：1979-10-30
申请人： KAWASAKI STEEL CO
发明人： MUTOU SHINICHIROU , SATOU KUNIAKI , MASUNO YOSHIHIKO , TAWARA KOUICHI
IPC分类号： G01K7/02 , G01K13/04
摘要： PURPOSE:To improve measurement accuracy by a method wherein the 1st thermoelectric couple to perform a temperature measurement of a metallic material to be inspected and the 2nd thermoelectric couple to measure the 1st thermoelectric couple are installed, and based on the output deviation of these 1st and 2nd thermoelectric couples, the heating temperature of a heater is controlled. CONSTITUTION:At the point part of the 1st thermoelectric couple 3 for measuring the temperature of steel plate which has a steel plate contact part 31 at the point, which is fixed entirely with insulating material except the steel plate contact part 31 and which is equipped with a heater 5 at the peripheral area of the point part, is fitted the 2nd thermoelectric couple 7 to measure the temperature of the thermoelectric couple 3 itself. And when the temperature of steel plate is measured by contacting the steel plate contact part 31 to a steel plate 1, the vicinity of the point contact part 31 of the 1st thermoelectric couple 3 is heated by controlling the heater 5 and together with this, a heating temperature control is performed based on the output deviation between the 1st and 2nd thermoelectric couples 3, 7. With this, the temperature of the moving steel plate 1 is accurately measured and responsibility is also improved.

4. 发明专利

JPS60114515A HEATING FURNACE FOR BILLET 失效
公开(公告)号：JPS60114515A
公开(公告)日：1985-06-21
申请号：JP22175983
申请日：1983-11-25
申请人： KAWASAKI STEEL CO
发明人： FUJITA SADAO , TOYOKAWA AKIRA , MUTOU SHINICHIROU , SHIMOMUKAI HISANAGA , UEDA KENJI
IPC分类号： C21D1/00 , C21D9/00 , C21D9/46 , F27B9/30 , F27B9/36 , F27D9/00 , F27D99/00
摘要： PURPOSE:To heat a billet to the uniform temp. in the transverse direction thereof in the stage of heating the billet while moving the same in a heating furnace by providing a vertically movable suspension ceiling to a part of the side wall in the transverse direction of the pass line for the billet. CONSTITUTION:A suspension ceiling 40 which can be vertically moved by a hanger 50 is provided above both ends 20A of a billet 20 and a projecting side wall part 36A is provided in the position below the pass line of a furnace wall 36 facing the ends 20 in the stage of heating the billet 20 while moving the same along the pass line A in a heating furnace 30. The central part 20B of the billet 20 is heated by the heat radiated from the ceilling 32 and bottom 34 of the furnace 30 and the ends 20A of the billet 20 are heated by the heat radiated from the ceilling 32, the bottom 34 and the wall 36 and are overheated than in the central part 20B. The radiation from the ceiling 32 and the wall 36 is therefore shielded by the ceiling 40 and the blow up of combusion gas from below to above is decreased by the projecting part 36A so that the ends of the billet can be heated to the uniform temp. approximately equal to the temp. in the central part 20B.

5. 发明专利

JPS608613A GAS FUEL COMBUSTION FOR DIRECT FIRING HEATING FURNACE AND BURNER THEREOF 失效
公开(公告)号：JPS608613A
公开(公告)日：1985-01-17
申请号：JP11602683
申请日：1983-06-29
申请人： KAWASAKI STEEL CO
发明人： SATOU KUNIAKI , MUTOU SHINICHIROU , NISHINO KAZUHIRO
IPC分类号： F23D14/14 , F23D14/20 , F23D14/24 , F23D14/30
摘要： PURPOSE:To prevent incurring of a heat loss, by a method wherein the total amount of the air for combustion, forming an indraft, is injected toward the inner periphery of tapered annular flow of gas for combustion. CONSTITUTION:Through feed of a high temperature air 20 to an indraft, and feed of heat gas or cold gas 21 to an outdraft, i.e., through feed of gas having temperature lower than a high temperature air flow to the outer periphery of the high temperature air flow, a heat loss can be easily prevented from being incurred without an increase in the volume of a thermal insulation part 22. An indraft air 20 is injected to the inner periphery of tapered annular gas 21, discharged to the outer periphery side thereof, by means of a nozzle group 24 forming an outward flow or an outward swirl flow which emits toward the interior of a furnace. The flow of the gas 21 extends along a burner tile 25 which is tapered toward the end to form a spread flame 26 in the direction of emission from the burner tile 25. As a result, a burner center part forms a stable flame circulating range, and a high temperature ignition source is formed at the central front of an indraft air nozzle group 24, being capable of being effectively utilized as a heat transfer space.

6. 发明专利

JPS58117831A CONTROLLING METHOD FOR COMBUSTION IN MULTIZONE TYPE HEATING FURNACE 失效
公开(公告)号：JPS58117831A
公开(公告)日：1983-07-13
申请号：JP52882
申请日：1982-01-05
申请人： KAWASAKI STEEL CO
发明人： MUTOU SHINICHIROU , TAKESHIMA RIKIO , KATAYAMA KOUHEI
IPC分类号： C21D9/00 , C21D1/52 , C21D11/00
摘要： PURPOSE:To control combustion accurately and quickly irrespectively of the influence of waste gas in a titled furnace wherein fuel and waste gas at upper stream side are supplied to each zone by taking the influencing components of the waste gas in consideration and controlling the air to fuel ratios of the corresponding zones. CONSTITUTION:If only the actually measured value of the deviation in the current concn. of O2 in downstream side zones is fed back (FB) in order to correct the deviation of the concn. of O2 in upper stream side zones, the actually measured value contains the excessive O2 of the inflow waste gases; therefore, said deviation is overcorrected. Thereupon, the influencing component of the waste gas is fed forward (FF) to the downstream side zones. The FF quantity FFj of the air to fuel ratio in zones 30-1- 30-n to 30-j is expressed by the equation II (lj+1 is the empirical value of FF factor of 30-j+1, DELTAO2j+1 is the deviation in the concn. of O2 of 30-j+1, Fk is the fuel amt. of the k-th zone, the term of the equation III is the excessive or defficient amt. of O2 in the waste gas to 30-j). Therefore, according to the result DELTAO2j of the concn. of O2 in 30-j, the FB of the air to fuel ratio to 30-j is determined by the equation IV (DELTAmj is the correcting rate of the air ratio of 30-j, kj is the empirical value of the influencing factor thereof, and DELTAj is the control output obtained by PI operation, etc. from DELTAO2j).

7. 发明专利

JPS6024323A TEMPERATURE CONTROL DEVICE OF CONTINUOUS HEATING FURNACE 失效
公开(公告)号：JPS6024323A
公开(公告)日：1985-02-07
申请号：JP13030783
申请日：1983-07-19
申请人： TOSHIBA KK , KAWASAKI STEEL CO
发明人： EZURE HISASHI , UEDA KENJI , SAIKAWA NATSUKI , MUTOU SHINICHIROU
IPC分类号： C21D9/00 , C21D11/00
摘要： PURPOSE:To improve the accuracy in slab discharging temp. by correcting the target discharging temp. of the slab according to the deviation between the estimated discharging temp. determined from the temp. on the discharging side and the predicted discharging temp. value obtd. by calculation from the temp. of the slab in a furnace. CONSTITUTION:The slab temp. detected with a thermometer 5 on a discharging side is inputted to an arithmetic means 13 for discharging temp., by which the estimated discharging temp. value is calculated. This value and the predicted discharging temp. value calculated by an arithmetic means 10 for the temp. of the slab in a furnace are compared by a correcting means 14 for the target discharging temp. and the deviation thereof is obtd. The correcting amt. of the target discharging temp. of the slab in the furnace is calculated according to the deviation. An arithmetic means 11 for the set furnace temp. adds the correcting amt. to the predetermined target discharging temp. and the succeeding set furnace temp. value is calculated by using an adding means 15 in accordance with the fresh target discharging temp. The value is outputted to a control means 8 for the furnace temp. by which a burner 9 is controlled. The operation is carried out at every passage of the slab through the thermometer 5.

8. 发明专利

JPS58123828A CONTINUOUS TYPE HEATING FURNACE 失效
公开(公告)号：JPS58123828A
公开(公告)日：1983-07-23
申请号：JP554482
申请日：1982-01-18
申请人： KAWASAKI STEEL CO
发明人： SOUMA FUYUKI , MUTOU SHINICHIROU
IPC分类号： C21D1/00 , C21D9/00 , F27B9/12
摘要： PURPOSE:To prevent a blowing up of an waste gas from gaps between blooms in two lines by forming with partition walls a passage for the waste gas flowing in from a heating zone under the blooms in an under part of an preheating zone of a continuous type heating furnace for which the blooms are charged parallelly in two lines. CONSTITUTION:The partition walls 6a, 6b and 6c, 6d having the height in which the wall does not abut to the blooms 5a, 5b are provided from a hearth 2 along outside surfaces of skid posts 4a, 4b and 4c, 4d under a preheaing zone. Heating zone sides of the walls 6a, 6d are bended to sides of furnace walls 1 and heating zone sides of the walls 6b, 6c are bended so as to contact each other. The path of the waste gas flowing from the heating zone side to a flue is formed from the blooms 5a, 5b on skids 3a, 3b and 3c, 3d and the walls 6a, 6b and 6c, 6d. Thereby, blowing up of the waste gas of the heating zone from the gap of the blooms 5a, 5b is prevented in the preheating zne and deterioration of heat transfer efficiency therein is prevented.

9. 发明专利

JPS5664205A METHOD AND DEVICE FOR LOW NOX COMBUSTION IN RADIANT TUBE BURNER 失效
公开(公告)号：JPS5664205A
公开(公告)日：1981-06-01
申请号：JP13872079
申请日：1979-10-29
申请人： KAWASAKI STEEL CO
发明人： MUTOU SHINICHIROU , SATOU KUNIAKI , TAWARA KOUICHI , NITOU TAKASHI
IPC分类号： F23C6/04 , F23C3/00 , F23C99/00
摘要： PURPOSE:To obtain a remarkable low NOx effect without spoiling combustibility by a method wherein internal flow air is introduced ino an inner tube and fuel is drawn in-between the inner tube and an intermediate tube surrounding the inner tube while external flow air is introduced in-between the intermediate tube and an outer tube surrounding the intermediate tube respectively. CONSTITUTION:A radiant tube burner 2 is connected with a fuel gas supplying tube 1 and an air introducing tube 6 and is used to heat an internal portion of a furnace by injecting produced combustion gas into a radiant tube 3, while the exhaust gas is discharged from a chimney through an exhaust gas conduit 7 passing in a combustion air preheater 4. In this case, the burner 2 is constituted with an inner tube 10, an intermediate tube 11 and an outer tube 12 and rear ends between the tube 10 and the tube 11 is closed by an annular plate 13 while a fuel nozzle 15 is communicated with the gas supplying tube 1 through a manifold 14. End of the outer tube 12 is closed by an end plate 16 while an internal air nozzle 18 and an external flow air nozzle 19 between the tube 11 and the tube 12 are communicated with an air conduit 6. The inner tube 10 is made shorter than the intermediate tube 11 and an inner periphery of a fore half of the intermediate tube 11 is lined with a fire resisting material 21.

10. 发明专利

JPS5662928A FURNACE TEMPERATURE SETTING METHOD OF HEATING ZONE IN A CONTINUOUS ANNEALING FURNACE 失效
公开(公告)号：JPS5662928A
公开(公告)日：1981-05-29
申请号：JP13967379
申请日：1979-10-29
申请人： KAWASAKI STEEL CO
发明人： NITOU TAKASHI , TAWARA KOUICHI , SATOU KUNIAKI , MUTOU SHINICHIROU , YAGISHIMA AKIYA
IPC分类号： C21D1/26 , C21D9/56 , C21D11/00
摘要： PURPOSE:To perform a heat treatment of steel strip efficiently with a low fuel consumption by applying a step heating or flat heating according to the target temperature of sheet at an outlet part of heating zone, adjusting the setting temperature of plural number in a heating zone in an annealing process of steel strip in a continuous annealing furnace. CONSTITUTION:In an annealing process, where steel strip passes through a heating zone, soaking zone, quenching zone, overaging zone, cooling zone the heatint zone is so devided into the first to sixth heating zones, 24-1-24-6, that the temperatures' distribution in the vertical direction of strip becomes uniform in heating. In this case the target plate temperature Ts at an outlet of the heating zone is compared with the prescribed temperature Tso which is corresponding to the upper limit of the flat heating capacity. When Ts in higher than Tso, step heating is applied by setting the furnace temperatures Tg1,2, Tg3,4, Tg5,6 respectively at the 1st and 2nd zone, the 3rd and 4th zone, the 5th and 6th zone with the difference of temperature in maximum 50 deg.C. When Ts is lower than Tso, flat heating is applied with the same setting temperature at each zone as mentioned above, thus reducing the fuel consumption in heating zone to minimum.

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