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1. 发明专利

JP2000319719A PLUG FOR STIRRING MOLTEN METAL 失效
公开(公告)号：JP2000319719A
公开(公告)日：2000-11-21
申请号：JP12804799
申请日：1999-05-10
申请人： KAWASAKI REFRACTORIES CO LTD
发明人： MITSUI HARUO , JINPO SATOSHI , MIZOGUCHI TETSUO
IPC分类号： C22B9/05 , C21C7/072
摘要： PROBLEM TO BE SOLVED: To stably execute gas injection from a plug for stirring molten metal made of closed quality refractory without increasing the gas pressure regardless of thermal expansion at the using time. SOLUTION: The gas injecting hole in the plug made of the closed quality refractory is arranged as an annular slit 4 over from the bottom part to the upper surface, and also, radiating slits 7 intermittently in the axial direction to the annular slit 4 are disposed so as to be communicated with the annular slit 4. Particularly, the radiating slits 7 at the lower part side to the pitch angle position having 1/2 to the radiating slits 7 at the upper part side of the plug, are disposed. The gas injection is almost continuously, uniformly and safely executed so that the height positions in the height direction at the lower part of the radiating slit 7 at the upper part side and at the upper part of the radiating slit 5 at the lower part side, are overlapped.

2. 发明专利

JPH10152717A GAS BLOWING NOZZLE FOR MOLTEN METAL AND WEARING CONTROL THEREOF 失效
公开(公告)号：JPH10152717A
公开(公告)日：1998-06-09
申请号：JP32753096
申请日：1996-11-21
申请人： KAWASAKI REFRACTORIES CO LTD , KAWASAKI STEEL CO
发明人： MIZOGUCHI TETSUO , UMAFUNE TAKUZOU , YAMADA SUMIO
IPC分类号： C21C5/48 , C21C7/00 , C21C7/072 , F27D7/02
摘要： PROBLEM TO BE SOLVED: To stabilize the blowing of stirring gas in gas blowing nozzle for stirring molten metal and to enable safe operation without developing the leakage of steel. SOLUTION: In the gas blowing nozzle for a molten metal furnace embedding plural fine pipes 3 for gas blowing into a refractory 2 of the gas blowing nozzle 1, a gas distributing part 4 communicated to each of radiating state, concentric- state, parallel-state flowing passage for gas blowing, is arranged at the lower end part of the fine pipes 3 for gas blowing so as to uniformly and stably blow the stirring gas into each fine pipe 3 for gas blowing and enable the closing of the fine pipe 3 for gas blowing by solidifying the molten metal at the time of flowing the molten metal into the fine pipe from happening. Then, at the time of becoming the clogging state by using the gas blowing nozzle 1 and flowing the molten metal into the fine pipe 3 for gas blowing, the variation of gas flow rate or gas pressure supplied into the gas blowing nozzle 1 is detected to control the wearing condition of the gas blowing nozzle 1 so as to be possible to safely execute the operation.

3. 发明专利

JPH11173764A FURNACE BOTTOM REFRACTORY STRUCTURE OF MELTED METAL CONTAINER OF ELECTRIC FURNACE OR THE LIKE 失效
公开(公告)号：JPH11173764A
公开(公告)日：1999-07-02
申请号：JP36193397
申请日：1997-12-09
申请人： KAWASAKI REFRACTORIES CO LTD , NISSHIN STEEL CO LTD
发明人： MIZOGUCHI TETSUO , YAMAMOTO ATSUSHI
IPC分类号： C21C5/52 , F27B3/08 , F27B3/10 , F27D1/00
摘要： PROBLEM TO BE SOLVED: To reduce the stress occurring in the fixed-form refractory of a stationary part by piling up fixed form of refractories in such condition that they lie in the direction of radiations having their centers on the inside of the furnace to make the pile structure of fixed-form refractories. SOLUTION: For the fixed-form refractories 7 of a stationary part 4 from the furnace floor 2 to the sidewall 3 of a molten metal container 1 such as an electric furnace, or the like, the fixed-form refractories 7 are piled up, in such condition that they lie in the direction of the radiations having their center on the inside of the furnace, inside the bricks 8 for permanent pavement executed to the furnace floor 2 or the sidewall 3, and sidewall fixed-form refractories 9 on the side of the sidewall 3 are piled up horizontally thereon. That is, the fixed-form refractories 7 are piled up in ring form, being made in the the same length with their furnace periphery side thickened and furnace interior side thinned, and with their furnace interiors on operation side and their furnace periphery side in required curved form. Hereby, the stress occurring the fixed- form refractory of the stationary part 4 can be reduced.

4. 发明专利

JPH1171610A GAS BLOWING PLUG FOR STIRRING MOLTEN METAL 失效
公开(公告)号：JPH1171610A
公开(公告)日：1999-03-16
申请号：JP24786497
申请日：1997-08-28
申请人： KAWASAKI REFRACTORIES CO LTD
发明人： MIZOGUCHI TETSUO
IPC分类号： C21C7/072 , F27D3/16
摘要： PROBLEM TO BE SOLVED: To improve the stirring effect on a molten metal and to enable the easy formation of gas flow passages by spirally disposing the gas flow passages into the dense refractories of a plug and blowing a molten metal stirring gas. SOLUTION: The gas blowing plug 1 is formed to a truncated circular cone shape of a spiral form by winding the dense refractories 2 of green sheets of a prescribed thickness apart prescribed intervals. Partitions 4 are spirally disposed apart prescribed distances in the spiral gaps 3 thereof. The bottom of the gas blowing plug 1 is provided with a gas pool part communicating the gaps 3 and this part is connected to a gas introducing pipe. Inert gas is supplied to this gas introducing pipe and is blown like a tornado into the molten metal from the spirally partitoned and formed gas flow passages 7. The blowing of the stirring gas in a state of generating twists is made possible even by the gas blowing plug 1 of a solid type. The stirring effect is thus enhanced by a convectional effect, the dispersion of air bubbles and the fining of the air bubbles.

5. 发明专利

JPH07208875A METHOD FOR REPLACING GAS AGITATION APPARATUS FOR MOLTEN METAL FURNACE 失效
公开(公告)号：JPH07208875A
公开(公告)日：1995-08-11
申请号：JP2219094
申请日：1994-01-20
申请人： KAWASAKI REFRACTORIES CO LTD , NISSHIN STEEL CO LTD
发明人： MIZOGUCHI TETSUO , TAKAGI YUJI , FUKAMI YASUTAMI , YAMAMOTO ATSUSHI
IPC分类号： C21C5/52 , C21C7/072 , F27D3/16
摘要： PURPOSE:To facilitate exchange of a gas blow-in nozzle of a molten metal furnace such as an electric furnace and ensure construction in a short time. CONSTITUTION:A gas blow-in nozzle 2 is mounted on a furnace bottom of a molten metal furnace, and a sleeve brick 4 is mounted on an outer periphery of the gas blow-in nozzle 2. Peripheries between the gas blow-in nozzle 2, the sleeve brick 4, and an outer squared brick are filled with powdered refractories. A cylindrical raplacing jig 3 located along the outer periphery sleeve brick 4 is removably mounted on a lifting bottom board 6 for mounting and lifting the gas blow-in nozzle 2 and the outer periphery sleeve brick 4, and hereby replacement of the gas blow-in nozzle 2 on a furnace bottom part is facilitated.

6. 发明专利

JPH07179928A PLUG FOR STIRRING MOLTEN METAL CAPABLE OF THERMALLY SPRAY REPAIRING SURROUNDING BRICKS AND ITS MANUFACTURE 失效
公开(公告)号：JPH07179928A
公开(公告)日：1995-07-18
申请号：JP34583093
申请日：1993-12-24
申请人： NISSHIN STEEL CO LTD , KAWASAKI REFRACTORIES CO LTD
发明人： YAMAMOTO ATSUSHI , OKAMOTO TAKESHI , MIZOGUCHI TETSUO
IPC分类号： B22D41/52 , B22D41/58 , C21C7/072 , C21C7/10 , F27D3/16
摘要： PURPOSE:To manufacture a plug for stirring molten metal capable of thermally spraying repairing the surrounding bricks with hardly generating sealing phenomenon, etc., at the time of applying the thermally spray-repairing to the worn recessed part of the surrounding bricks fitting the plug for stirring the molten to a vessel for molten metal. CONSTITUTION:This plug is fitted to the bottom part or near the bottom part of the vessel for molten metal to blow inert gas into the molten metal in order to mainly stir the molten metal in the vessel. Then, in this plug 1 having a structure composed of a gas permeable part 1a for permeating the gas for stirring the molten metal at the center part and a nearly gas impermeable castable refractory part 1b at the outer peripheral part, residual moisture content in the castable refractory part 1b is defined as =18hr in a furnace.

7. 发明专利

JPH06145759A METHOD FOR CHANGING NOZZLE FOR BLOWING FURNACE BOTTOM GAS IN MOLTEN METAL FURNACE 失效
公开(公告)号：JPH06145759A
公开(公告)日：1994-05-27
申请号：JP31666792
申请日：1992-10-30
申请人： KAWASAKI REFRACTORIES CO LTD
发明人： MIZOGUCHI TETSUO
IPC分类号： C21C5/48
摘要： PURPOSE:To fit a gas blowing nozzle for bottom blowing even when interval between the furnace bottom part of a molten metal furnace and the floor surface is narrow and to change the nozzle in a short period in the case of erosion. CONSTITUTION:At the lower part of a hanging metal tool 15 in the lower surface side of the gas blowing nozzle 8 and sleeve brick 7 fitted to the furnace bottom part 2 of the molten metal furnace 1, a pushing-up tool 19 of a hydraulic jack, etc., is arranged Then, granular refractory 12 around the sleeve brick 7 arranged at the peripheral part of the gas blowing nozzle 8 is dropped and removed and a through-hole 20 for pulling out is opened in a castable refractory 13 remained on the upper part thereof with a braker, etc., a hanging-up tool 23 is inserted into this through-hole 20 and the lower end part thereof is restrained to the hanging metal tool 15. By driving the pushing-up tool 19 and hanging the hanging-up tool 23 upward, the gas blowing nozzle 8 and the sleeve brick 7 are pulled out, and instead of these old nozzle and brick, the new gas blowing nozzle and the sleeve brick are fitted to the furnace bottom part 3 to exchange the gas blowing nozzle.

8. 发明专利

JPH0494863A METHOD FOR REPAIRING FOUNDRY LADLE AND TUYERE 失效
公开(公告)号：JPH0494863A
公开(公告)日：1992-03-26
申请号：JP21482590
申请日：1990-08-13
申请人： KAWASAKI REFRACTORIES CO LTD
发明人： MIZOGUCHI TETSUO
IPC分类号： B22D41/02 , B22D41/52 , B22D43/00
摘要： PURPOSE:To permit manpower saving in repairing a tuyere and to improve the operability of a foundry ladle by removing metal and slag sticking to a tuyere with a cutter device, then, casting monolithic refractories with a monolithic refractory device. CONSTITUTION:A cutter device 2 arranged on the tuyere 8 is rotated and driven to remove metal and slat sticking to the tuyere part 8. When a hardware frame mold 4 is equipped on the tuyere part 8 to cast monolithic refractories from the monolithic refractory casting device 3 erected on a frame 23 to prevent flowing out of refractory material between the tuyere part 8 and the hardware flame mold 4, the tuyere tart 8 can be repaired, manpower saving be permitted and hot repairing be conducted.

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