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41. 发明专利

JPS6191318A Operating method of ladle refining furnace 失效
标题翻译：奶油精炼炉的操作方法
公开(公告)号：JPS6191318A
公开(公告)日：1986-05-09
申请号：JP21333184
申请日：1984-10-12
申请人： Nippon Kokan Kk
发明人： NAKAJIMA HIROHISA , KOMATSU YOSHIMI , IKEDA MASABUMI , KONDO TSUNEO
IPC分类号： C21C7/072 , C21C7/00
CPC分类号： C21C7/0075
摘要： PURPOSE:To improve the stirring efficiency of a molten steel without increasing the rate of blowing gaseous Ar in the stage of refining the molten steel in a ladle refining furnace by mixing a flux with the gaseous Ar from a lance for stirring the molten steel. CONSTITUTION:The gaseous Ar is blown into the molten steel 4 in the ladle refining furnace 1 from the bubbling lance 6 for stirring powerfully the molten steel 4 and the bubbling lance 7 for stirring lightly the molten steel 4 in the stage of adding an alloy iron thereto, by which the component adjustment by the addition of the ally iron to the molten steel and the dephosphorization and desulfurization refining thereof are executed. The flow rate of the gaseous Ar to be blown from the lance 7 is maintained at 500-1,000l/min in this case and a slag forming agent such as lime and flux such as alloy agent are added and blown at 5-30kg/kg in solid-gas ratio into the molten steel. The stirring efficiency of the molten steel is improved by increasing the rate of the flux in the molten steel without increasing the amt. of the gaseous Ar.
摘要翻译：目的：为了提高钢水的搅拌效率，而不会增加在钢包精炼炉中精炼钢水阶段吹入气态Ar的速度，通过将熔剂与来自喷枪的气态Ar混合以搅拌钢水。构成：将气态Ar从鼓泡枪6吹入钢包精炼炉1中的钢水4，强力搅拌钢水4和鼓泡喷枪7，在加入合金铁的阶段中轻轻地搅拌钢水4 由此，进行通过将钢铁添加到钢水中的成分调整和脱磷脱硫精炼。在这种情况下，从喷枪7吹出的气态Ar的流量保持在500-1,000l / min，并且加入诸如石灰的熔渣形成剂和合金剂等助熔剂，并以5-30kg / kg吹以固气比计入钢水。钢水的搅拌效率通过提高钢水中的助熔剂的速度而不增加amt来提高。的气态Ar。

42. 发明专利

JPS6184314A Method for arc heating molten steel 失效
标题翻译：弧加热钢的方法
公开(公告)号：JPS6184314A
公开(公告)日：1986-04-28
申请号：JP20363884
申请日：1984-09-28
申请人： Nippon Kokan Kk
发明人： NAKAJIMA HIROHISA , KOMATSU YOSHIMI , IKEDA MASABUMI , KONDO TSUNEO
IPC分类号： C21C5/52 , C21C7/00
CPC分类号： C21C7/0075
摘要： PURPOSE:To reduce extremely wear of ladle refractory, by measuring temp. difference between molten steel and slag thereon after stopping arc heating, and continuing agitation or applying arc heating again according to the measured value. CONSTITUTION:Gas is introduced into a molten steel 2 to stir it, and the steel 2 is heated for a prescribed time. Next, arc heating is stopped, a moving member 7 is lowered to insert a thermocouple 5 through a cover 4, then to dip it into the steel 2 in a ladle 1. Temp. difference between the steel 2 and a slag 3 thereon is measured by the thermocouple 5. In case the difference is a prescribed temp. difference or more, agitation of the steel 2 is continued to lower the temp. of the slag 3, in case the difference is less than the specified difference, arc heating is applied again.
摘要翻译：目的：减少钢包耐火材料的极度磨损，通过测量温度。停止电弧加热后的钢水与渣的差异，根据测定值继续搅拌或再次施加电弧加热。构成：将气体引入钢水2中进行搅拌，将钢2加热规定时间。接下来，停止电弧加热，移动构件7降低，通过盖4插入热电偶5，然后将其浸入钢包2中的钢包1中。通过热电偶5测量钢2和炉渣3之间的差异。在差异为规定温度的情况下。差异以上，钢2的搅拌持续降低。的渣3，如果差小于规定的差值，则再次施加电弧加热。

43. 发明专利

JPS6112815A Method for adding alloying or refining agent to molten steel degassing vessel 失效
标题翻译：用于添加合金或精炼剂以减少钢质脱水容器的方法
公开(公告)号：JPS6112815A
公开(公告)日：1986-01-21
申请号：JP13088784
申请日：1984-06-27
申请人： Nippon Kokan Kk
发明人： TERADA OSAMU , MIZUOKA SEISHI , IKEDA MASABUMI , USUI TSUTOMU
IPC分类号： C21C7/04 , C21C7/072 , C21C7/10
CPC分类号： C21C7/10
摘要： PURPOSE:To regulate accurately the alloy composition of molten steel in a molten steel degassing vessel by directly blowing an alloying or refining agent into the molten steel under reflux from the side wall of the vessel so as to prevent the powdery agent from flowing in an exhaust system or sticking to the inner wall of the vessel. CONSTITUTION:Molten steel in a molten steel degassing vessel X is forced to be refluxed with an inert gas introduced through a booster line 4 connected to a tuyere 1 at a lower part of the side wall of the vessel X. The line 4 is connected to a powder source 2 contg. an alloying or refining agent. The agent is sent to the line 4 with a pressurized inert gas introduced as a carrier gas through a pressurizing line 3, and it is blown into the molten steel under reflux from the tuyere 1 through the booster line 4.
摘要翻译：目的：通过在容器的侧壁回流下直接将合金或精炼剂吹入钢水中，准确地调节钢水脱气容器中钢水的合金成分，以防止粉末剂在排气中流动系统或粘附到容器的内壁。构成：在钢水脱气容器X中的钢水被强制地通过在容器X的侧壁的下部连接到风口1的增压管线4引入的惰性气体回流。管线4连接到粉末源2 合金或精炼剂。用作为载气的加压惰性气体通过加压管线3将试剂送入管线4，并通过增压管线4从风口1回流吹入钢水。

44. 发明专利

JPS59190314A Melting method of low nitrogen killed steel 失效
标题翻译：低氮杀死钢的熔炼方法
公开(公告)号：JPS59190314A
公开(公告)日：1984-10-29
申请号：JP6374183
申请日：1983-04-13
申请人： Nippon Kokan Kk
发明人： SHIRATANI YUUSUKE , HASEGAWA TERUYUKI , MATSUDA YASUHIRO , KOMATSU YOSHIMI , IKEDA MASABUMI , KOBAYASHI HITOSHI
IPC分类号： C21C7/06 , C21C7/04
CPC分类号： C21C7/04
摘要： PURPOSE:To melt a low nitrogen killed steel in a short denitriding treatment time by tapping the steel without deoxidation or with half deoxidation to maintain the concn. of oxygen in the steel at a specific value or above then adding a deoxidizing agent and an alloy iron thereto in a low nitrogen atmosphere then subjecting the steel to vacuum degassing. CONSTITUTION:Molten steel is tapped from a converter 1 to a ladle 2 in the state of un-deoxidation (about >=150ppm concn. of O in the steel) without addition of a deoxidizing agent or after the steel is half deoxidized to the extent of assuring >=40ppm concn. of O in the steel. The ladle 2 is then capped and gaseous Ar is blown therein. The deoxidizing agent and the entire volume of the alloy iron are charged into the steel in a low nitrogen atmosphere. The steel is subjected to a degassing treatment with an installation 3 of RH (reflux type vacuum degassing device) or the like, by which the steel is denitrided. The nitrogen is less absorbed in the steel in the stage of tapping according to the above- mentioned method and therefore the killed steel contg. nitrogen in a low concn. is obtd. in a short denitriding time.
摘要翻译：目的：在短时间的脱氮处理时间内，通过对钢进行脱氧而不进行脱氧或半脱氧以维持浓度，从而熔化低氮杀死的钢。的氧气在特定值以上，然后在低氮气氛下加入脱氧剂和合金铁，然后对钢进行真空脱气。构成：在不脱氧剂的情况下，在未脱氧（约> = 150ppm浓度的钢中）将钢水从转炉1中分离到钢包2中，而不加入脱氧剂，或者钢在半脱氧后达到一定程度确保> = 40ppm浓度的O在钢。然后将钢包2盖上，气体Ar吹入其中。将脱氧剂和合金铁的总体积在低氮气氛中装入钢中。对钢进行脱气处理，使用RH的装置3（回流式真空脱气装置）等进行脱氮处理。根据上述方法，在攻丝阶段，氮在钢中吸收较少，因此，低浓度氮是obtd。在短暂的脱硝时间。

45. 发明专利

JP2001049361A METHOD FOR RECOVERING ZINC IN DUST 失效
公开(公告)号：JP2001049361A
公开(公告)日：2001-02-20
申请号：JP2000067263
申请日：2000-03-10
申请人： NIPPON KOKAN KK
发明人： INOUE AKIHIKO , TABATA YOSHIAKI , MURAKI YASUNORI , IZAWA TOMOO , ISHIZAKA SHO , HINO TADAAKI , IKEDA MASABUMI
IPC分类号： C22B19/04 , C21C1/04 , C21C7/072 , C21C7/076 , C22B7/02 , C22B9/10 , C22B19/30
摘要： PROBLEM TO BE SOLVED: To recover zinc while sufficiently raising zinc concn. without executing pre-treatment of agglomeration or the like, by adding pre-melt slag produced in an iron-making process in a specified range when the zinc is separatively recovered by blowing zinc-containing dust containing not less than a specified value of the zinc into molten iron. SOLUTION: When the zinc is separatively recovered by blowing the zinc- containing dust containing >=0.5 mass% zinc into the molten iron, the pre-melt slag produced in the iron-making process is added at 1-10 kg/ton of the molten iron to recover the zinc. At least one kind among blast furnace slag, molten iron desiliconized slag, molten iron dephosphorized slag and decarburized slag, is suitable to be used for the pre-melt slag. Silicon concn. in the molten iron before executing the separatively recovering treatment, is made to >=0.2 mass% or carbon concn. in the molten iron before and after this treatment, is made to 3.4-4.8 mass%, and the silicon concn. in the molten iron after the treatment is made to >=0.03 mass% and thus, it is desirable to raise the zinc concn. in the dust.

46. 发明专利

JPH11193416A METHOD FOR DESULFURIZING MOLTEN STEEL 失效
公开(公告)号：JPH11193416A
公开(公告)日：1999-07-21
申请号：JP36685397
申请日：1997-12-26
申请人： NIPPON KOKAN KK
发明人： TANAKA HIROSHI , IKEDA MASABUMI , FUKUSHIMA HIRONORI , INOUE AKIHIKO
IPC分类号： C21C7/04 , C21C7/064
摘要： PROBLEM TO BE SOLVED: To reduce the temp. drop of molten steel and to lower the desulfurization cost by supplying a desulfurizing agent contg. Al and MgO into the molten steel to allow the Al to react with the MgO and allowing the generated Mg vapor to react with S in the molten steel to deposit MgS. SOLUTION: Al and MgO are used as the main components of a desulfurizing agent. The desulfurizing agent is preferably supplied into molten steel while agitating the molten steel with an inert gas. The Al is allowed to react with the MgO in the molten steel to form Al2 O3 and an Mg vapor. The Mg vapor is allowed to react with S dissolved in the molten steel to form and deposit MgS. The weight ratio of the Al to the MgO in the desulfurizing agent is preferably made within a range of 0.455 to 1.45. The powder as the Al source is the finer, the better and the powder having

47. 发明专利

JPH10306306A STEELMAKING METHOD IN CONVERTER USING DEPHOSPHORIZED MOLTEN IRON 失效
公开(公告)号：JPH10306306A
公开(公告)日：1998-11-17
申请号：JP23050197
申请日：1997-08-13
申请人： NIPPON KOKAN KK
发明人： KOMATSU YOSHIMI , TANAKA HIDESHIGE , KODAIRA SATOSHI , IKEDA MASABUMI , KAWASHIMA KAZUTOSHI , INOUE SHIGERU , KIKUCHI ICHIRO , TANABE HARUYOSHI
IPC分类号： C21C5/28 , C21C1/02
摘要： PROBLEM TO BE SOLVED: To provide a method for producing steel by decarburize-refining molten iron dephosphorized in another refining vessel without substantially using slag- making material. SOLUTION: (a) The molten iron is dephosphorize-refined in the refining vessel to refine P content in the molten iron to the P content required to crude steel or lower. (b) The dephosphorize-refined molten iron is charged into a converter to execute the decarburize-refining without substantially charging the slag-making material. In the converter executing the decarburize-refining, manganese ore is further charged and Mn content at the end point is raised to the Mn content within the upper limit of Mn standard value needed for the crude steel.

48. 发明专利

JPH0625729A DEVICE FOR REMOVING METAL STUCK TO FURNACE OPENING PART IN CONVERTER 失效
公开(公告)号：JPH0625729A
公开(公告)日：1994-02-01
申请号：JP18403592
申请日：1992-07-10
申请人： NIPPON KOKAN KK
发明人： HIRONAKA TADAO , TAMURA KOUNOSHIN , IKEDA MASABUMI
IPC分类号： C21C5/46
摘要： PURPOSE:To remove the metal stuck to the furnace opening part in a converter within short time. CONSTITUTION:This device is composed of a lance 1 having holes injecting oxygen sideward at the lower part and a lifting track 2 ascended/descended by fitting this lance, and a hollow shaft 5 rotated by a driving device is connected to the upper part of the lance through a rotary pipe joint 4. Further, a swivel pipe joint 6 is connected to the upper part of this hollow shaft, and in this swivel pipe joint, the oxygen supplying nozzle 12 is provide a and in the rotary pipe joint, a supplying nozzle 13 for cooling water introduced into the lance and a discharging nozzle 14 are provided. Since the lance is rotated in this device, the oxygen blowing in the periphery of the lance becomes the same condition as the oxygen injection executed from the whole periphery of the lance to uniformly execute the oxygen blowing to the surface of the stuck metal 22. By this method, melting of the stuck metal 22 in the whole periphery of the furnace opening part is executed at the uniform speed and the removal time of the stuck metal 22 is remarkably shortened.

49. 发明专利

JPH0459365B2 失效
公开(公告)号：JPH0459365B2
公开(公告)日：1992-09-22
申请号：JP18239087
申请日：1987-07-23
申请人： NIPPON KOKAN KK
发明人： UCHIDA SHIGETAKA , YAMASE OSAMU , IKEDA MASABUMI , NAKAJIMA HIROHISA
IPC分类号： C21C1/02 , C21C1/08

50. 发明专利

JPH02221315A METHOD FOR TAPPING MOLTEN STEEL IN CONVERTER AND APPARATUS FOR PREVENTING OUTER AIR SUCTION IN STEEL TAPPING HOLE 失效
公开(公告)号：JPH02221315A
公开(公告)日：1990-09-04
申请号：JP4227589
申请日：1989-02-21
申请人： NIPPON KOKAN KK
发明人： FUKUMI JUNICHI , MASAOKA TOSHIO , IKEDA MASABUMI , KOMATANI MASANORI , ARAI MANABU , INOUE AKIHIKO
IPC分类号： C21C5/46
摘要： PURPOSE:To prevent absorption of N2 in the air and oxidation with O2 in the air of molten steel tapping stream by arranging an inside nozzle fitting pipe and an outside nozzle fitting pipe around a steel tapping hole in a converter and injecting inert gas in parallel or toward obliquely outward direction to the molten steel tapping stream. CONSTITUTION:At the time of tapping the molten steel 5 into a ladle 2 as the molten steel tapping stream 9 from the molten steel tapping hole 3 in the converter 1, at outer circumferential part of the steel tapping hole 3, the inside nozzle fitting pipe 7 having plural injecting holes 12 and the outside nozzle fitting pipe 8 provided with plural injecting holes 13 at the outside of the inside nozzle fitting pipe 7 are fitted. One kind of inert gas. CO and CO2 gas from the injecting holes 12 of the inside nozzle fitting pipe 7 is injected as parallel gas flow 10 to the molten steel tapping stream 9, and the above gas flow 11 from the injecting holes 13 of the outside nozzle fitting pipe 8 is injected in parallel or toward obliquely outward direction to the molten steel tapping stream 9. The molten steel tapping stream 9 is not brought into contact with the air by these gas injecting flows, and it is prevented that N2 content ratio is increased by absorbing N2 in the air and the molten steel is oxidized with O2 in the air.

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