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1. 发明专利

JPH1180828A IMMERSION TUBE IN DEGASSING EQUIPMENT 失效
公开(公告)号：JPH1180828A
公开(公告)日：1999-03-26
申请号：JP24524797
申请日：1997-09-10
申请人： KAWASAKI STEEL CO
发明人： YOKOYAMA MITSUNOBU , TAKADA SHIGENOBU , TAKAHASHI KIYOSHI , TANAKA MASATO
IPC分类号： C21C7/10
摘要： PROBLEM TO BE SOLVED: To extend the service life of an immersion tube by improving the cooling of a core metal forming the immersion tube in a degassing equipment. SOLUTION: Cooling water is supplied into a water supplying tube 14 by driving awater supplying pump 19, and after promoting the cooling of double tube core metals 13 and a refractory 3 by flowing the cooling water into a cooling water piping 17 arranged in the gap of the double tube core metals 13, the cooling water is drained from a drainage pipe 10. Since the cooling water is used as the cooling medium, the cooling capacity can drastically be increased. Further, since the cooling of the double tube core metals 13 is executed by supplying the cooling gas into the gap of the double tube core metals 13 from a cooling gas supplying tube, the extension of the service life of the immersion tube 10 is achieved. In the case the cooling water piping 17 breaks from happening, the steam developed caused by water breakage is quickly escaped to the outer part through a gas exhaust opening hole 16 to prevent the steam explosion. Further, the steam in the cooling water piping 17 is escaped to the outer part through a safety valve 21 arranged in each of the water supplying pipe 14 and the drainage pipe 15.

2. 发明专利

JPH083618A LANCE 失效
公开(公告)号：JPH083618A
公开(公告)日：1996-01-09
申请号：JP13885394
申请日：1994-06-21
申请人： KAWASAKI STEEL CO
发明人： OKAMOTO HIROSHI , TAKASHIBA NOBUMOTO , YOKOYAMA MITSUNOBU , YOSHIDA MASAHIRO
IPC分类号： C21C5/46 , F27D3/16
摘要： PURPOSE:To provide a lance, in which gas for refining and/or powdery material for refining can be blown at a necessary and sufficient high speed and by which an effect of the stirring with the gas for refining and the removal of inpurities (e.g. the removal of [S]) in molten steel with the powdery material for refining can be compatible with each other. CONSTITUTION:An inner pipe 20 having a shape concentrically connected with the straight type inner pipe for accelerating the powdery material at the tip end part of a Lavel shaped inner pipe for accelerating the gas and an outer pipe 40 surrounding this inner pipe 20 for cooling are provided. In this inner pipe 20, the Lavel section 28 composed of a tapered section 22, a contracting section 24 having min. diameter and an expanding section 26, is formed. At the tip end part of this Lavel section 28, a straight section 30 having the same diameter as the end part of the expanding section 26 is formed.

3. 发明专利

JPH11264009A DEVICE FOR PREVENTING AND REMOVING METAL DEPOSITION ON NOSE OF CONVERTER 失效
公开(公告)号：JPH11264009A
公开(公告)日：1999-09-28
申请号：JP6654598
申请日：1998-03-17
申请人： KAWASAKI STEEL CO
发明人： YOKOYAMA MITSUNOBU , TAKAHASHI KIYOSHI
IPC分类号： C21C5/46
摘要： PROBLEM TO BE SOLVED: To not only remove deposited metal on the furnace nose of a converter, but also, to prevent the deposition of the metal on the furnace nose. SOLUTION: Plural gas jetting nozzles 5 freely adjustable to the position are arranged with interval on the circumference in a gap formed between the furnace nose 2 of the converter 1 and a skirt 4. During blowing the converter 1, gaseous nitrogen is jetted from the gas jetting nozzles 5 to prevent the sticking of the metal 3 near the furnace nose 2. After blowing the converter 1, gaseous oxygen is jetted from the gas jetting nozzles 5, and the metal 3 stuck to near the furnace opening part 2 is melted in good workability and removed.

4. 发明专利

JPH09143541A COOLING METHOD FOR REFRACTORY 失效
公开(公告)号：JPH09143541A
公开(公告)日：1997-06-03
申请号：JP29940395
申请日：1995-11-17
申请人： KAWASAKI STEEL CO
发明人： YOKOYAMA MITSUNOBU , TAKAHASHI KIYOSHI
IPC分类号： C21C7/10 , F27D1/12
摘要： PROBLEM TO BE SOLVED: To reduce damage to a refractory for an immersed pipe and to prolong the life thereof. SOLUTION: A cooling pipe 8 is fixed by welding around a cylindrical core bar 2 of the immersed pipe 1 subjected to much thermal load and immersed in molten steel 5, and a solid-gas two-phase fluid formed by mixing an air for transport with solid particles such as glass particles and CaCO3 having a high cooling capacity, etc., is supplied from an inlet side of the cooling piping 8 to increase the cooling of the core bar 2 and refractory 3.

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