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1. 发明专利

JPS5816006A DEPHOSPHORIZING METHOD FOR MOLTEN IRON 失效
公开(公告)号：JPS5816006A
公开(公告)日：1983-01-29
申请号：JP9438881
申请日：1981-06-17
申请人： KOBE STEEL LTD
发明人： NARITA KIICHI , MAKINO TAKEHISA , MATSUMOTO HIROSHI , HIKOSAKA AKIHIDE , OONISHI TOSHIYASU , TAKAGI WATARU , KATSUTA JIYUNICHIROU , SASAKI MASATOSHI
IPC分类号： C21C1/02 , C21C5/32
摘要： PURPOSE:To dephosphorize molten iron efficiently while suppressing the oxidation loss of C, Mn and Fe in the molten iron in particular by top blowing O2 into low Si molten iron while blowing flux powder consisting essentially of CaO together with a carrier gas into said molten iron. CONSTITUTION:Flux powder consisting of CaO, iron oxide and a fluxing agent or said compounds and a reaction accelerator (e.g.; Na2CO3) is blown together with a carrier gas such as N2 introduced 5 through a lance 2 into molten iron of =2. O2 is blown through an O2 top blowing lance 6 onto the surface of the molten iron over approximately the entire period of blowing of the flux powder. As a result, the P in the molten iron is carried with the ascending flow of the flux and the carrier gas and is floated on the surface, in which part it reacts with the top blown O2 and is oxidized and removed efficiently, at the same time, desiliconization and desulfurization reaction is progressed as well.

2. 发明专利

JPS57199548A PRODUCTION OF LOW-CARBON KILLED STEEL BY CONTINUOUS CASTING METHOD 失效
公开(公告)号：JPS57199548A
公开(公告)日：1982-12-07
申请号：JP8364181
申请日：1981-05-30
申请人： KOBE STEEL LTD
发明人： OOTA YASUHIKO , HANAZONO TAKESHI , TAKAGI WATARU , SAITOU TADASHI , OONISHI TOSHIYASU
IPC分类号： C21C7/076 , B22D11/10 , B22D11/11 , B22D11/115
摘要： PURPOSE:To produce low-carbon killed steel of less inclusions and particularly high subcutaneous flaw reducing effect by cleaning molten steel contg. C at a prescribed value or below then supplying the same together with a flux into a mold for casting and drawing it out continuously at specific drawing speeds under electromagnetic induction agitation. CONSTITUTION:The molten steel contg.

3. 发明专利

JPS60137559A CONTINUOUS CASTING METHOD OF HIGH-CARBON CHROMIUM BEARING STEEL 失效
公开(公告)号：JPS60137559A
公开(公告)日：1985-07-22
申请号：JP24713883
申请日：1983-12-27
申请人： KOBE STEEL LTD
发明人： OONISHI TOSHIYASU , KAWASAKI SHIYOUZOU , MOTOI HIDEO , UENO NOBUAKI , SUZUKI YASUO , KANEKO KOUJI
IPC分类号： B22D11/10 , B22D11/115
摘要： PURPOSE:To decrease striate segregation and to make its quality uniform and its productivity high by installing an electromagnetic stirrer in a prescribed position and casting continuously a molten steel by and at a prescribed magnetic field, degree of heating the molten steel and casting speed. CONSTITUTION:The molten steel in an intermediate solidification period cast continuously at mm. (where the length on the short side of the casting mold); >=150mm.), d: thickness of the billet (mm.), K: solidification constant (mm./min , V: the upper limit value of billet casting speed (m/min) or VX[(d/2-5)/K] (where the length on the short side of the casting mold;

4. 发明专利

JPS58193307A Control of desiliconation of molten iron 失效
标题翻译：控制铁矿石的分解
公开(公告)号：JPS58193307A
公开(公告)日：1983-11-11
申请号：JP7688982
申请日：1982-05-07
申请人： Kobe Steel Ltd , Riken Kogyo Kk
发明人： OONISHI TOSHIYASU , TAKAGI WATARU , KATSUTA JIYUNICHIROU , TOZAWA ISAO , ICHIKAWA TADASHI
IPC分类号： C21C1/04
CPC分类号： C21C1/04
摘要： PURPOSE:To carry out desiliconation treatment of molten iron flowing down through a molten iron trough certainly in good efficiency, by measuring the silicon content in molten iron tapped from a shaft furnace by a thermoelectromotive force method to adjust the desiliconation condition of molten iron in the molten iron trough. CONSTITUTION:A skimmer is arranged in a course tapping molten iron from a shaft furnace through a molten iron trough to separate shaft furnace slag while the part of molten iron is sampled from the molten iron trough and poured into a casting mold to prepare a test piece. Subsequently, the thermoelectromotive force muV of the obtained test piece is measured and the silicon content in molten iron can be measured rapidly and accurately from a calibration curve; [%Si]=0.0573 X exp(muV/249). In the next step, a molten iron trough desiliconation condition such as the addition amount of a desiliconating agent is controlled corresponding to the above mentioned silicon content. By this method, proper desiliconation is carried out in good efficiency to make it possible to carry out succeeding out-furnace refining and converter refining in extremely good efficiency.
摘要翻译：目的：通过热电动势法测定从竖炉中抽出的铁水中的硅含量，通过测量铁水中的脱硅条件，对铁水槽中的铁水进行脱硅处理，铁水槽构成：撇渣器布置在从竖炉的铁水中通过铁水槽分离的铁水中，以分离竖炉炉渣，同时将铁水的一部分从铁水槽取样并倒入铸模中以制备试件。随后，测量所得测试件的热电动势muV，并且可以从校准曲线快速且准确地测量铁水中的硅含量; [％Si] = 0.0573×exp（muV / 249）。在下一步骤中，对应于上述硅含量控制脱铁剂的添加量等铁水槽脱硅条件。通过该方法，能够以良好的效率进行适当的脱硅，从而能够以极高的效率进行后续的精炼和转炉精炼。

5. 发明专利

JPS5816007A DEPHOSPHORIZING AND DESULFURIZING METHOD FOR MOLTEN IRON 失效
公开(公告)号：JPS5816007A
公开(公告)日：1983-01-29
申请号：JP9698281
申请日：1981-06-22
申请人： KOBE STEEL LTD
发明人： NARITA KIICHI , MAKINO TAKEHISA , MATSUMOTO HIROSHI , HIKOSAKA AKIHIDE , OONISHI TOSHIYASU , TAKAGI WATARU , KATSUTA JIYUNICHIROU
IPC分类号： C21C1/02 , C21C5/32
摘要： PURPOSE:To obtain high levels of dephosphorization and desulfurization rates through relatively simple operation by dephosphorizing molten iron under regulation of the basicity and iron oxide contents respectively after treatment by the use of CaO type flux then blowing a desulfurizing agent into the molten iron in the presence of slag. CONSTITUTION:The CaO type flux in a supply hopper 3 is blown together with a carrier gas 5 into the molten iron in a molten iron treating furnace 1 in such a way that the basicity of slag after the treatment attains >=2.0 and the content of iron oxide

6. 发明专利

JPS54109034A METHOD OF CASTING 失效
公开(公告)号：JPS54109034A
公开(公告)日：1979-08-27
申请号：JP1604378
申请日：1978-02-14
申请人： KOBE STEEL LTD
发明人： OONISHI TOSHIYASU , SHIAKU KIYOSHI , ITOU SHIYUUZOU , SOEJIMA TOSHIYUKI , YAMAZAKI MASAOMI
IPC分类号： B22D7/12 , B22D11/10 , B22D11/106 , B22D21/02 , B22D23/00

7. 发明专利

JPS5445611A TREATING MOLTEN METAL 失效
公开(公告)号：JPS5445611A
公开(公告)日：1979-04-11
申请号：JP11207777
申请日：1977-09-16
申请人： KOBE STEEL LTD
发明人： OONISHI TOSHIYASU , ITOU SHIYUUZOU , ISHIMITSU KUNIO
IPC分类号： C21C7/072 , B23K35/30 , C21C7/00
摘要： PURPOSE:In deoxidation and desulfurization processes wherein a carrier gas mixed with a smelting powder additive is blowing into a molten pig iron or steel, the carrier gas is preheated so as to effectively prevent blocking of lance holes and to improve desulfurization efficiency while using a lesser gas quantity. CONSTITUTION:A carrier gas is preferably heated to 200 to 800 deg.C while passsing from an inlet 8 through a heat exchanger 7. A specified quantity of additive is added to the carrier gas from an additive reservoir 12 through a control valve 13. Then, the high temperature aditive-suspending carrier gas passes through a pipe 14 into a lance 4 dipped in a ladle 1. The suspension bubbles consisting of powder additive and carrier gas are injected from the lance terminal 6 into molten components, where they are reacted with each other and cause agitation to promote floating and separation of deoxidation and desulfurization products.

8. 发明专利

JPS59193743A Electromagnetic stirring method of continuous casting billet of different steels 失效
标题翻译：连续铸钢不锈钢电磁搅拌方法
公开(公告)号：JPS59193743A
公开(公告)日：1984-11-02
申请号：JP7037983
申请日：1983-04-20
申请人： Kobe Steel Ltd
发明人： OONISHI TOSHIYASU , WAKASUGI ISAMU , OOKAMI MASAHIKO , SUZUKI YASUO
IPC分类号： B22D11/10 , B22D11/115 , B22D11/12
CPC分类号： B22D11/115 , B22D11/122
摘要： PURPOSE:To prevent central segregaion of a continuous casting billet at the joint part and to improve the yield thereof by providing respectively electromagnetic stirrers near the water-cooled casting mold of a continuous casting device, the terminal part of solidification of the drawn billet and between said parts and operating the stirrers in accordance with a schedule. CONSTITUTION:A billet is drawn while all of the 1st-3rd electromagnetic stirrers 2a, 2b, 2c are operated during the time when the joint part of different kinds of steels moves by the length corresponding to the distance L (b-c) from the molten metal surface in a casting mold 1 to the 2nd stirrer 2b and to the 3rd stirrer 2c. The billet is drawn by stopping the 3rd stirrer 2c and operating the 1st and 2nd stirrers 2a, 2b during the time when the joint part of the different kinds of steels drawn by the length corresponding to the distance L (b-c) arrives at the 2nd stirrer 2b. The billet is drawn by operating only the 1st stirrer 2a during the time when said joint part moves to the 2nd-3rd stirrers 2b, 2c. The billet is drawn under stirring by the stirrers 2c, 2a after the joint part arrives at the stirrer 2c.
摘要翻译：目的：为了防止在连接部分连续铸造坯料的中心分离并通过在连续铸造装置的水冷铸造模具附近设置分别电磁搅拌器来提高其产量，拉伸坯料的凝固终端部分和表示部件按照时间表操作搅拌器。构成：当在不同种类的钢的接合部分移动相当于距离熔融金属的距离L（bc）的长度的时间期间，所有第1〜3电磁搅拌器2a，2b，2c全部被操作时，在第1搅拌机2b和第3搅拌机2c的铸模1中的表面。通过停止第三搅拌器2c并操作第一和第二搅拌器2a，2b，在对应于距离L（bc）的长度拉伸的不同种类的钢的接合部分到达第二搅拌器 2B。在所述接合部移动到第2〜第3搅拌器2b，2c的时间期间，只通过操作第1搅拌器2a来抽出坯料。在接头部分到达搅拌器2c之后，通过搅拌器2c，2a的搅拌下将钢坯拉伸。

9. 发明专利

JPS58151411A REFINING METHOD IN CONVERTER BY BLOWING 失效
公开(公告)号：JPS58151411A
公开(公告)日：1983-09-08
申请号：JP3477882
申请日：1982-03-04
申请人： KOBE STEEL LTD
发明人： OONISHI TOSHIYASU , TAKAGI WATARU , KATSUTA JIYUNICHIROU , NARITA KIICHI , MATSUMOTO HIROSHI , HIKOSAKA AKIHIDE
IPC分类号： C21C5/28
摘要： PURPOSE:To carry out refining by blowing with high thermal efficiency by charging molten iron subjected to desiliconization, dephosphorization and desulfurization into a converter, adding coke or the like, and carrying out slagless refining by blowing. CONSTITUTION:Molten iron subjected to desiliconization, dephosphorization and desulfurization is charged into a converter, and slagless or slagminimum refining is carried out by blowing after adding coke or coal to the converter as a heat supplying source. Coke breeze discharged as minus mesh from a stage for regulating the grain size of coke as starting material is granulated to a suitable grain size, and the granules can be used economically as said coke. Thus, heat of combustion of coke is utilized most effectively to increase the temp. of the molten iron, and the sulfur content of blown molten steel can be controlled to a low level.

10. 发明专利

JPS5842714A PRELIMINARILY DESILICONIZING METHOD FOR MOLTEN IRON 失效
公开(公告)号：JPS5842714A
公开(公告)日：1983-03-12
申请号：JP14012881
申请日：1981-09-05
申请人： KOBE STEEL LTD
发明人： NARITA KIICHI , MAKINO TAKEHISA , MATSUMOTO HIROSHI , HIKOSAKA AKIHIDE , OONISHI TOSHIYASU , TAKAGI WATARU , KATSUTA JIYUNICHIROU , SASAKI MASATOSHI
IPC分类号： C21C1/04 , C21C5/32
摘要： PURPOSE:To remove Si efficiently while preventing the oxidation losses of C, Mn and Fe in particular in the stage of preliminary desiliconization of molten steel by adding a specific ratio of lime with repsect to a target rate of desiliconization to the surface of the molten iron. CONSTITUTION:If a target rate of desiliconization is defined as x% in a pretreating furnace 1 contg. molten iron 4 and slag 5, lime is added to the surface of the molten iron at 12.9x-30.1xkg per ton of the steel to be produced from said iron. O2 is top-blown by hard blow through an oxygen top blowing lance 2 simultaneously with the addition of said lime; at the same time, a bottom- blowing gas such as gaseous N2 is blown through a porous plug 3 for bottom blowing, whereby the molten iron is agitated. As a result, the above-described effect is developed. In addition, the amount of the formed slag is minimized; whereby the rate of addition of an auxiliary raw material (CaO) is decreased and the loss of the iron component (FeO) in the slag is decreased.

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