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51. 发明专利

JPH0445230A CONTINUOUS HEAT-TREATING EQUIPMENT FOR STEEL STRIP 失效
公开(公告)号：JPH0445230A
公开(公告)日：1992-02-14
申请号：JP14982490
申请日：1990-06-11
申请人： NIPPON STEEL CORP
发明人： HAYASHI JUNICHI , SUZUKI ATSUSHI , KAWAGUCHI KATSUNORI , TODA YUJI
IPC分类号： C21D9/56 , F27B9/30
摘要： PURPOSE:To easily control the pressure of a furnace and to prevent the generation of plate flows by providing a waste combustion gas passage gradually expanding from the side end at right angles to the steel strip surface to the travel pass of a direct-fired furnace provided with a group of burners directed toward a steel strip. CONSTITUTION:A group 13 of burners directed toward a traveling steel strip S are arranged along a steel strip pass 14 in a direct-fired furnace 3 of continuous heat-treating equipment. In this equipment, a waste combustion gas passage 16 consisting of a tapered part 17 expanding orthogonally to the strip S and a square part 18 is formed at the side end of the pass 14. A taper 20 is furnished to the passage 16 at the uppermost part of the furnace chamber 11. Consequently, the waste combustion gas flows smoothly into the passage 16 from the pass 14, and the waste gas current is not swirled, the furnace pressure is easily controlled at a low equipment cost, and the generation of plate flows due to the fluttering of the strip S is prevented.

52. 发明专利

JPH0440329A OXIDE FILM MEASURING INSTRUMENT FOR HEAT TREATING FURNACE FOR STEEL BELT 失效
公开(公告)号：JPH0440329A
公开(公告)日：1992-02-10
申请号：JP14633990
申请日：1990-06-06
申请人： NIPPON STEEL CORP
发明人： TODA YUJI , KAWAGUCHI KATSUNORI , NAKAKUBO ATSUSHI
IPC分类号： G01N25/18 , C21D9/56 , G01B11/06 , G01J5/00
摘要： PURPOSE:To consolidate quality control by providing a thermometer which has a steel belt emissivity measuring function on one surface of the steel belt and a monochromatic thermometer which measures the temperature of the steel belt on the other surface, and calculating the film thickness of an oxide film from the steel belt temperature and emissivity. CONSTITUTION:the thermometer 4 which has the emissivity measuring function photodetects a two-wavelength light beam emitted by the oxide film A1 on the surface A of the steel belt and outputs signals 11 and 12 of radiation brightness x and brightness y. An arithmetic unit 5 finds the temperature T1 and emissivity epsilonx from the signals 11 and 12 and inputs signals 13 and 14 to a film thickness arithmetic unit 6, which calculates film thickness t1 and outputs a film thickness signal 15. Further, the monochromatic thermometer 8 photodetects the single-wavelength light beam emitted by the oxide film B1 and outputs a signal 16 of radiation brightness z. An arithmetic unit 9 calculates temperature T2 from the signal 16 and assumed emissivity epsilon and outputs a temperature signal 18 and an assumed emissivity signal 17. A device 10 compares the temperature T1 with the temperature T2 to correct the emissivity epsilon, and emissivity epsilon0 is calculated to calculate the film thickness t2 of the oxide film B1, thereby outputting a film thickness signal 19. A controller 7 controls burner operation with the signals 13, 15, and 19.

53. 发明专利

JPH0415402A CONSTRUCTION OF DIRECT FIRED REDUCTION HEATING BURNER FOR STEEL STRIP 失效
公开(公告)号：JPH0415402A
公开(公告)日：1992-01-20
申请号：JP11586790
申请日：1990-05-07
申请人： NIPPON STEEL CORP
发明人： TODA YUJI , KAWAGUCHI KATSUNORI
IPC分类号： F23D14/22 , C21D9/56
摘要： PURPOSE:To improve the reducing capability by installing a straight tube shape burner tile portion with a specific inside diameter length on the wall of a direct fired reducing furnace and installing a plurality of double tube type discharge holes for discharging fuel gas and air in the bottom of burner tile portion in a construction of direct fired reduction heating burner for continuous annealing facilities for steel strip and the like facilities. CONSTITUTION:A straight tube shaped burner tile portion 1 with an inside diameter of 60-120mm and a length of 50-130mm is installed on the wall 7 of direct fired reducing furnace for steel strip, one end of the burner tile portion 1 being open and the other end thereof having a bottom 2. In the bottom 2, an appropriate number of outer tubes 3 for inserting nozzles 10 are disposed. An outer cylinder 4 is installed at the periphery of the burner tile bottom 2. The outer cylinder 4 incorporates an inner cylinder 8, a fuel expanding chamber 9 communicating with the inner cylinder 8, and nozzles 10 projecting from the wall of the fuel expanding chamber 9 to form double tube type discharge holes 11 in the burner tile bottom 2. This constitution heats the surface of steel strip to a high temperature and forms a strongly reducing atmosphere to effectively perform reduction heating.

54. 发明专利

JPH03183751A IN-BATH IMPURITY REMOVING DEVICE IN ZINC POT 失效
公开(公告)号：JPH03183751A
公开(公告)日：1991-08-09
申请号：JP32112689
申请日：1989-12-11
申请人： NIPPON STEEL CORP
发明人： KAWAGUCHI KATSUNORI , TODA YUJI , TSUDA YUICHI , IKEDA TAKUO
IPC分类号： C23C2/00
摘要： PURPOSE:To easily remove the in-bath impurities in a zinc pot of a plating line by rotating a gas-blowing lance having vanes in the zinc pot. CONSTITUTION:The gas-blowing lance 1 with vanes is rotatably mounted in the zinc pot 4 of the galvanizing line. Bubbles 7 generated by the rotation of the revolving lance 1 with the vanes capture the in-bath impurities 6 and float on the bath surface. The bubbles 7 displace a top dross film 2 and tend to spread the top dross film 2 over the entire area of the bath surface but the top dross film 2 is stopped by a frame 3. The execution of the recover of the top dross at customary frequencies suffices accordingly. The inspection and service of the lance 1 by pulling the lance from the bath together with blowing and lifting the lance 1 by a lifting device 8 are facilitated.

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