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1. 发明专利

JPH0432521A APPARATUS FOR SUPPLYING AND RECOVERING GRANULES 失效
公开(公告)号：JPH0432521A
公开(公告)日：1992-02-04
申请号：JP13850790
申请日：1990-05-30
申请人： KAWASAKI STEEL CO , DIAMOND ENG CO LTD
发明人： NAKAJI SHIGERU , IKEDA TAKAYUKI , UEDA OSAMU , MATSUZAKI ISAO , ITO TOSHIYUKI
IPC分类号： C21D9/673
摘要： PURPOSE:To enable automation of the work and uniformize supply and recovery of granules within the desired time and to improve quality of a cold-rolled steel plate by arranging supply-recovery part composed of a rotary hopper, supplying and recovering chutes, nozzle, etc., to a heat treatment furnace. CONSTITUTION:The granules 23 are sent into a supplying hopper 11 through an insert tube 13 with a supplying and pressurized sending device, and while measure-controlling shifting quantity in turning and advance-retreating parts 7, 4, position of the nozzle 21 is matched with supplying position to furnace hearth 22. After that, a supporting frame 9 is ascended/descended with a lift driving part 10 to adjust gap between the nozzle 21 and the furnace hearth 22. Successively, while turning the nozzle 21 by rotating lower part from the rotary hopper 14 with a rotary driving part 15, the granules are qualified with a fixed quantity qualifying feeder 12 and uniformly supplied onto the furnace hearth 22 through a supplying tube 16, hopper 14, supplying chute 18 and nozzle 21. The granules already used, are sucked and recovered into separating device from the nozzle 21 through the recovering chute 19, joint 20 and recovering tube 17 by opening a change-over valve built in the rotary joint 20 and stopping the feeder 12.

2. 发明专利

JPH03264146A METHOD FOR DECIDING AND CONTROLLING END POINT OF POURING MOLTEN STEEL 失效
公开(公告)号：JPH03264146A
公开(公告)日：1991-11-25
申请号：JP6104990
申请日：1990-03-14
申请人： KAWASAKI STEEL CO
发明人： ITO TOSHIYUKI
IPC分类号： B22D11/10 , B22D11/103 , B22D37/00
摘要： PURPOSE:To automatically decide pouring end point, to quickly stop molten steel pouring flow and to prevent mingle of slag by blowing inert gas to molten steel pouring flow, splashing slag therein, and recovering the slag for detection. CONSTITUTION:The molten steel 4 is poured into a tundish 1 from a pouring nozzle 3 in a ladle 2. Then, a sealing member 5 is arranged in between both and the inert gas of Ar, etc., is introduced in the inner part thereof from a gas nozzle 6 to prevent the involution of air into the molten steel pouring flow 4a. Further, by raising pressure of the above inert gas at the end stage of pouring the molten steel 4, the gas is blown into the molten steel pouring flow 4a. By this method, the slag having low sp. gr. is blown off from the molten steel pouring flow 4a and received by splashed slag receiving plate 7 to prevent its mingling into the tundish 1. Together with this, the splashed slag is detected by an optical type detector 8 of reflecting type, etc., set to hole part 5a and the pouring end point of molten steel is decided by a decision control device 9 and opening/shutting device 11 of a stopper, etc., is worked through a pouring open/shut driving device 10 to stop the pouring of molten steel.

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