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1. 发明专利

BR8905304A 未知
公开(公告)号：BR8905304A
公开(公告)日：1990-05-22
申请号：BR8905304
申请日：1989-10-18
申请人： NIPPON KOKAN KK , ISHIKAWAJIMA HARIMA HEAVY IND
发明人： NAKADA MASAYUKI , KOMATSU MASAMI , TAKASUGI HIDETO , KAWAI YOSHIHIKO , OZEKI AKICHIKA , OSADA SHIRO
IPC分类号： B22D11/06
摘要： A casting machine comprises a pair of travelling block mold assemblies (22) each having a plurality of block mold members (23) endlessly connected to one another to define a cavity (27), and a mechanism for driving the block mold members (23) such that the block mold members of one travelling block mold assembly (22) move in synchronism with those of the other in a casting direction. Latticed grooves (25, 34, 35, 36) are form on at least an area of the inner wall of each of the block mold members (23) which combine with one another to form the cavity (27). Delays in the solidification of molten steel in the cavity (27) are intentionally caused by these grooves, with the result that the concentration of contraction stress caused by the solidification delays at those seams (3) along which the adjacent block mold members (23) are connected to each other to form the cavity (27) can thus be reduced to prevent the creation of cracks on surfaces of cast products.

2. 发明专利

CA2000618A1 CASTING MACHINE HAVING A TRAVELLING BLOCK MOLD ASSEMBLY 未知
公开(公告)号：CA2000618A1
公开(公告)日：1990-04-19
申请号：CA2000618
申请日：1989-10-13
申请人： NIPPON KOKAN KK , ISHIKAWAJIMA HARIMA HEAVY IND
发明人： NAKADA MASAYUKI , KOMATSU MASAMI , TAKASUGI HIDETO , KAWAI YOSHIHIKO , OZEKI AKICHIKA , OSADA SHIRO
IPC分类号： B22D11/06
摘要： A casting machine comprises a pair of travelling block mold assemblies each having a plurality of block mold members endlessly connected to one another to define a cavity, and a mechanism for driving the block mold members such that the block mold members of one travelling block mold assembly move in synchronism with those of the other in a casting direction. Latticed grooves are formed on at least an area of the inner wall of each of the block mold members which combine with one another to form the cavity. Delays in the solidification of molten steel in the cavity are intentionally caused by these grooves, with the rsult that the concentration of contraction stress caused by the solidification delays at those seams along which the adjacent block mold members are connected to each other to form the cavity can thus be reduced to prevent the creation of cracks on surfaces of east products.

3. 发明专利

JPH02108440A METHOD FOR DETECTING MOLTEN METAL SURFACE IN SHIFTING MOLD TYPE CONTINUOUS CASTING 失效
公开(公告)号：JPH02108440A
公开(公告)日：1990-04-20
申请号：JP26146188
申请日：1988-10-19
申请人： NIPPON KOKAN KK , ISHIKAWAJIMA HARIMA HEAVY IND
发明人： NAKADA MASAYUKI , KOMATSU MASAMI , TAKASUGI HIDETO , KAWAI YOSHIHIKO , OZEKI AKIYA , TAKAHASHI SHUZO
IPC分类号： B22D11/06
摘要： PURPOSE:To decide molten metal surface position and to control casting condition by detecting temp. at each position in a mold in order while shifting temp. detecting means arranged at each block mold member together with the mold member, bringing the temp. detecting means into contact with receiver means and receiving the detected signal. CONSTITUTION:By shifting each roller 46 together with the mold member 23, the roller 46 is slidingly brought into contact with one after another of the receiver members 48 and the temp. detected signal of thermocouple 40 is transferred from the shifting side to the fixed side. These signals are inputted into a computer 52 through the detector 50. In the computer 52, conditions of shifting velocities (a), (b) of the mold, drawing velocity (c) of the cast slab and pouring velocity of the molten metal, are obtd. so that the molten metal surface becomes the fixed position based on the inputted data. Then, command corresponding to these conditions is transferred to each actuator to control the actual casting movement. As the temp. detecting means is embedded in the mold, this does not disturb a nozzle for pouring the molten metal and continuous casting is stably executed. By this method, the surface characteristic on the cast slab can be improved.

4. 发明专利

JPH02108442A BLOCK TYPE SHIFTING MOLD 失效
公开(公告)号：JPH02108442A
公开(公告)日：1990-04-20
申请号：JP26146388
申请日：1988-10-19
申请人： NIPPON KOKAN KK , ISHIKAWAJIMA HARIMA HEAVY IND
发明人： NAKADA MASAYUKI , KOMATSU MASAMI , TAKASUGI HIDETO , KAWAI YOSHIHIKO , OZEKI AKIYA , OSADA SHIRO
IPC分类号： B22D11/06
摘要： PURPOSE:To prevent the development of crossing crack and longitudinal crack and to improve the yield of a cast slab by forming grid-like grooves on a part of casting wall in each block mold member and arranging these grid grooves in casting direction and the crossing direction at the right angle to this. CONSTITUTION:Molten metal 12 is poured into a cavity 27 in the block caster 20 through a nozzle 14. Carrying velocities (a), (b) of the mold members 23 for upper and lower units 22 and cast slab drawing velocity (c) are suitably controlled with a computer in accordance with variations of molten metal pouring rate and molten metal surface in the cavity. The block mold member 23 has L-shape of the cross section as crossing at the right angle to the casting direction, and the grid-like grooves 25 are formed on the long side surface 24 in the inner wall thereof. The groove 25 has V-shape of the shallow groove depth to the groove width. When the solidified shell grows, shortage of cooling to the molten metal at joint part of the mutual block mold members is developed and solidified delay is formed and shrinkage stress is concentrated and the crossing crack on the cast slab is apt to develop. The longitudinal crack is apt to develop as the same as the above. As the grid-like grooves are formed, shrinkage stress is dispersed to the whole casting wall. By this method, the development of the crack is prevented and the yield of the cast slab can be improved.

5. 发明专利

JPH02108441A NOZZLE FOR SHIFTING TYPE MOLD 失效
公开(公告)号：JPH02108441A
公开(公告)日：1990-04-20
申请号：JP26146288
申请日：1988-10-19
申请人： NIPPON KOKAN KK , ISHIKAWAJIMA HARIMA HEAVY IND
发明人： NAKADA MASAYUKI , TAKASUGI HIDETO , KAWAI YOSHIHIKO , OZEKI AKIYA , TSUCHIDA HIROSHI
IPC分类号： B22D11/06
摘要： PURPOSE:To prevent sticking of solidified metal to a nozzle tip by providing molten metal flowing passage formed with a refractory, gas passage formed as opening so as to surround this discharging hole and means for supplying oxidizing gas into the gas passage. CONSTITUTION:The molten metal 12 is poured into a cavity 27 and caterpillar driving for each mold unit 22 and cast slab drawing velocity are optimumly controlled while adjusting the molten metal pouring rate with a sensor and control unit in tundish side. At the time of continuously pouring the molten metal through the nozzle 14, temp. gradient between the molten metal discharging hole 30 side and the nozzle outer circumferential side, is developed and the molten metal is solidified and stuck to the nozzle tip 15. This is grown as the solidified metal 40 and apt to bridge between the nozzle and casting wall, but oxygen gas is injected toward the tip part 15 from an injection hole 18. As the oxygen gas is directly injected to the solidified metal 40, Fe component is oxidized and melted with exothermic reaction. Therefore, it does not happen that the solidified metal 40 is taken in the solidified shell 26 caused by falling-down from the nozzle tip. By this method, the sticking of solidified metal is prevented and the cast slab having sound surface characteristic can be obtd.

6. 发明授权

US3645720A Method of deoxidizing steel 失效
标题翻译：脱铁方法
公开(公告)号：US3645720A
公开(公告)日：1972-02-29
申请号：US3645720D
申请日：1969-08-04
申请人： NIPPON KOKAN KK
发明人： IMAI RYOCHIRO , KAWAI YOSHIHIKO
IPC分类号： C21C7/06
CPC分类号： C21C7/06
摘要： In a steel manufacturing process an oxygen concentration cell is immersed in the molten steel bath, the maximum differentiated value of the electromotive force is detected and the detected maximum value is utilized as the control factor for adjusting the quantity of deoxidizing agent to be subsequently added into the molten steel bath.
摘要翻译：在钢铁制造过程中，将氧浓度电池浸入钢水浴中，检测出电动势的最大微分值，并利用检测到的最大值作为调整随后添加的脱氧剂量的控制因素钢水浴。

7. 发明专利

CA1303133C METHOD, APPARATUS, AND PROBE FOR MEASURING THE ACTIVITY OF A SOLUTE ELEMENT IN MOLTEN METAL 未知
公开(公告)号：CA1303133C
公开(公告)日：1992-06-09
申请号：CA610341
申请日：1989-09-05
申请人： SASABE MINORU , NIPPON KOKAN KK , OSAKA OXYGEN IND
发明人： SASABE MINORU , HASEGAWA TERUYUKI , ISHIKAWA HIROAKI , KAWAI YOSHIHIKO , FURUTA CHIKAYOSHI , NAGATSUKA TOSHIO , MATSUSHIGE HARUHIKO
IPC分类号： G01N27/411 , G01N33/20 , G01N27/409
摘要： \\ A method for measuring an activity of a solute element M in molten metal comprises steps of measuring an electromotive force El corresponding oxygen content of the molten metal by means of a solid electrolyte having oxygen ion conductivity and measuring temperature T of the molten metal, also measuring the electromotive force E2 corresponding to manganese content of the molten metal by means of a solid electrolyte having oxygen ion conductivity and coated with MnO, and obtaining the manganese activity aMn on the basis of the measured electromotive forces El, E2 and the measured temperature T. Another activity measuring method comprises steps of measuring the temperature T and solidifying temperature Ts of molten metal, obtaining the carbon concentration ¢C! of the molten metal on the basis of the solidifying temperature Ts, also measuring the manganese electromotive force E2 in the molten metal by means of a solid electrolyte having oxygen ion conductivity and coated with MnO, and obtaining the manganese activity aMn on the basis of the measured electromotive force E2, the carbon concentration ¢C!, and the measured temperature T. An Mn sensor electrode comprises a solid electrolyte surrounding a reference and having oxygen ion conductivity, and a coating layer composed of MnO or a composite oxide thereof and covering the outer periphery of the solid electrolyte. The MnO or the composite oxide for the coating layer has a composition such that two or more balance portions A, B, C, D are provided for an electromotive force E1, E2 measured by an electromotive force measuring circuit, the electromotive force E1, E2 being defined by the manganese activity aMn in the first one A, C of the balance portions, and by the oxygen activity aO in the molten metal in the last balance portion B, D.

8. 发明专利

CA2052163A1 Probe Using a Mixed Sub-Electrode for Measuring the Activity of Carbon in Molten Iron 未知
公开(公告)号：CA2052163A1
公开(公告)日：1992-03-27
申请号：CA2052163
申请日：1991-09-24
申请人： NIPPON KOKAN KK , SASABE MINORU , OSAKA OXYGEN IND
发明人： SASABE MINORU , KAWAI YOSHIHIKO , KIKUCHI YOSHITERU , TAKAOKA TOSHIO , SENO HIROMI , FURUTA CHIKAYOSHI , NAGATSUKA TOSHIO
IPC分类号： G01N27/411 , G01N27/406 , G01N27/409 , G01N27/416
摘要： A probe having the inventive composition, it is possible to measure the activity of the solute carbon though without the stable oxides or the composite oxides at the high temperature in the solute elements containing in the molten iron. The probe comprises a solid electrolyte having a mixed sub-electrode provided on its surface, and a reference electrode for providing a predetermined oxygen potential is disclosed.

9. 发明专利

CA1289364C METHOD FOR MELTING AND REDUCING CHROME ORE 未知
公开(公告)号：CA1289364C
公开(公告)日：1991-09-24
申请号：CA522788
申请日：1986-11-12
申请人： NIPPON KOKAN KK
发明人： MORI HAJIME , HIRANO MINORU , HASEGAWA TERUYUKI , KAWAI YOSHIHIKO , KIKUCHI YOSHITERU , TAKAHASHI KENJI
IPC分类号： C22B5/10 , C22B9/04 , C22B34/32
摘要： A method for melting and reducing chrome ore, which comprises charging chrome ore and carbonaceous material, and blowing in oxygen gas under a pressure ranging from 1 to 600 Torr, while molten metal is being stirred by a stirring gas blown in. In this method, a reaction vessel capable of allowing top blowing and bottom blowing onto the molten metal and decreasing pressure within the vessel is employed. Chrome ore and carbonaceous material can be used in the form of lumps or powder. When powdered ore and material are used, they can be injected through a lance or a tuyere into the vessel.

10. 发明专利

CA1069463A METHOD FOR REMOVING HYDROGEN SULFIDE 未知
公开(公告)号：CA1069463A
公开(公告)日：1980-01-08
申请号：CA230480
申请日：1975-06-30
申请人： NIPPON KOKAN KK
发明人： FUKUDA YUTAKA , IHIDA MUTSUMI , KAWAI YOSHIHIKO
IPC分类号： B01D53/52 , B01D53/77 , B01J19/08 , C01B17/05 , C01B17/74 , C01F11/46 , C10K1/12 , C25B1/22
摘要： A method for removing hydrogen sulfide from a hydrogen sulfide entrained gas comprises the steps of bringing the hydrogen sulfide entrained gas into contact with an alkaline absorption solution with a pH of 10 to 14 to cause hydrogen sulfide in the gas to be absorbed into an alkaline absorption solution, subjecting the resultant absorption solution to a DC electrolytic treatment whereby an alkaline solution is separated into a cathode chamber and sulfur and sulfuric acid are separated into an anode chamber, and circulating as the alkaline absorption solution the alkaline solution produced within the cathode chamber. This constitutes a closed system, thereby completely eliminating a cause for public nuisance.

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