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    • 17. 发明专利
    • FLUIDIZED BED HEATING FURNACE
    • JPH0317227A
    • 1991-01-25
    • JP15155089
    • 1989-06-14
    • TOHO GAS KKKAWASAKI STEEL COKOMATSU MFG CO LTD
    • HATTORI MASAOOYABU YOSHIKIKISHIDA SHUICHIHAMATAKA AKIOFUKUDA TATSUTAKENOSHITA HIDEMITSU
    • C21D1/53F27B15/18
    • PURPOSE:To heat-treat a metallic material in a nonoxidation atmosphere and to maintain a specified temp. and fluid state by using a natural gas for a fluidizing gas and providing means for causing partial combustion and regulating the temp. and pressure of a fluidized bed. CONSTITUTION:The natural gas and air from tanks 12, 11 are mixed at a prescribed ratio and are sent via a fluidizing gas control valve 2 to a dispersion chamber 922 where the gaseous mixture is ejected from ejection holes 921 of a dispersion plate 92 to fluidize the fluidized bed 94 and to cause the partial combustion thereof. The above mentioned fluidizing gas is partly fed via a pipe 15 into a radiant tube 3 where the gas is partially burnt to heat the fluidized bed 94. The exhaust gas thereof is sent via an exhaust gas control valve 4 to the dispersion chamber 922. The temp. of the fluidizing gas in the fluidized bed 94 is kept detected at all times and the flow rate of the gas is regulated via a fluidizing gas control valve. The pressure of the fluidizing gas in the dispersion chamber 922 is kept detected at all times by a sensor 45 and is kept at a prescribed pressure via the exhaust gas control valve 4. The generation of oxide scale on the surface of the steel product 88 is prevented in this way and the fluidized bed 94 is maintained in the optimum state.
    • 20. 发明专利
    • SWING HEATING FURNACE
    • JPH105921A
    • 1998-01-13
    • JP18543396
    • 1996-06-25
    • TOHO GAS KKASABE KOGYO KK
    • HATTORI MASAONAKAMURA YOSHIHIROASABE SHUICHI
    • F16C13/00B21J17/00C21D1/00C21D1/52F23L15/02F27B9/18F27D3/12F27D17/00
    • PROBLEM TO BE SOLVED: To prevent influence on other tubes even when the tube made of ceramic is damaged, by providing plural tubes made of the ceramic in a furnace body in a position lower than a burner, pushing a metallic material in the hollow part of the tube, rotating while swinging the furnace body, and heating the metallic material. SOLUTION: Plural tubes 2 made of the ceramic are provided in the furnace body 11 under the regenerative burner 4. After pushing the metallic material in the hollow part of the tube 2 by a pusher from a feeding part 21, the metallic material is heated. The tubes 2 are arranged in concentric circle positions to the center 10 of the swing. Plural guide pins 12 are arranged in the concentric circle positions to the center 10 in the furnace body 11. By engaging an advanceable and retreatable engaging part 33 with the guide pin 12, and by moving a slide plate 32 back and forth, the furnace body 11 is swung through the engaging part 33 and the guide pin 12. The metallic material after heating is pushed outside the tube 2 from the opposite side of the feeding part 21. Even when the tube 2 is broken, it is directly dropped on the bottom part of the furnace body 11, and the other tubes 2 are not affected by it.