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公开(公告)号：EP0146696A1
公开(公告)日：1985-07-03
申请号：EP84111365.7
申请日：1984-09-24
发明人： Ikehara, Yasunobu c/o Hikari Works , Ariyoshi, Haruki c/o Hikari Works , Hidaka, Ryoichi c/o Hikari Works
CPC分类号： C21C7/064 , C21C5/005 , C21C7/0685
摘要： The refining of chromium-containing molten steel by decarburization, reduction, and desulfurization is improved in terms of consumption of argon gas used for blowing molten steel, wear and tear of refractories of the AOD furnace, and consumption of CaO and CaF 2 , etc. by a process which comprises the addition of metallic Al as a reducing agent and CaO as a slag-forming agent to the slag existing after completion of the decarburization, respectively in amounts necessary for the slag, after completion of the subsequent reduction, to acquire a SiO 2 content of not more than 10% and a CaO/Al 2 O 3 ratio in the range of 0.8 to 2.0, thereby enabling the treatments of reduction and desulfurization to proceed simultaneously.
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82.发明公开Process and apparatus for adding calcium to a bath of molten ferrous material 失效在Eisenschmelzen的Verfahren und Vorrichtung zum Einbringen von Calcium。
公开(公告)号：EP0137618A2
公开(公告)日：1985-04-17
申请号：EP84305326.5
申请日：1984-08-06
申请人： PFIZER INC.
IPC分类号： C21C7/00
摘要： A process for adding calcium to a bath (2) of molten ferrous material is disclosed in which a calcium metal-containing wire (1) is fed through a refractory lance (5) into the bath (2). Recirculatory stirring of the molten ferrous material is accomplished with an inert gas flow through the lance (5). The calcium-containing wire (1) is fed at such a rate that it substantially bends towards the horizontal direction after it leaves the lance (5) and melting of the calcium in the wire (1) occurs primarily in or directly below a region of downwelling of the molten ferrous material. Suitable wire feeding rates will depend upon the disposition of the lance (5) in the bath and the composition (e.g. clad or unclad) and cross-sectional dimensions of the calcium metal-containing wire (1). A preferred apparatus for adding processing elements in wire form directly into a molten material comprises a heat resistant nozzle (60) positionable relative to the surface of the molten material such that an inlet is disposed above the surface and an outlet (84) is disposed beneath the surface; a mechanism (24) for feeding the wire (20) through the nozzle (60) directly into the molten material; and a system (31, 33, 42) for injecting a substantially inert gaseous medium into the molten material together with the wire (20), whereby the inert gas substantially prevents closure of the nozzle (60) by solidified molten material and promotes mixture of the processing elements with the molten material through gas bubble agitation. The apparatus further comprises a substantially gas-tight conduit (44) connected to the nozzle inlet, through which the wire (20) and the inert gaseous medium are delivered to the nozzle (60). A pressure-driven seal (30) prevents atmospheric contamination and prevents loss of inert gas. Passing the wire (20) and gaseous medium through a bore in the nozzle (60) having an elongated, gradually tapered funnel-shaped section (80) adjacent the outlet (84) maximizes the effect of the inert gaseous medium.
摘要翻译： 公开了一种向熔融铁质材料的浴（2）中加入钙的方法，其中将含钙金属的丝线（1）通过耐火喷枪（5）进料到熔池（2）中。 熔融铁质材料的循环搅拌是通过穿过喷枪（5）的惰性气体流完成的。 含Ca的丝线（1）以这样的速率进给，使得其在离开喷枪（5）之后基本上向水平方向弯曲，并且丝线（1）中的钙的熔化主要发生在或 熔融黑色金属材料的下流。 合适的送丝速度将取决于喷枪（5）在浴中的配置以及含钙金属丝（1）的组成（例如包层或未包层）和横截面尺寸。 用于将线形式的处理元件直接添加到熔融材料中的优选设备包括可相对于熔融材料的表面定位的耐热喷嘴（60），使得入口设置在表面上方，并且出口（84）设置在 表面; 用于将所述线材（20）通过所述喷嘴（60）直接进入所述熔融材料的机构（24）; 和用于将线性材料（20）一起将基本上惰性的气体介质注入熔融材料的系统（31,33,42），由此惰性气体基本上防止了凝固的熔融材料堵塞喷嘴（60）并促进了 处理元件与熔融材料通过气泡搅动。 该设备还包括连接到喷嘴入口的基本上气密的导管（44），线（20）和惰性气体介质通过该导管输送到喷嘴（60）。 压力驱动密封件（30）防止大气污染并防止惰性气体的损失。 将导线（20）和气体介质通过喷嘴（60）中的孔具有邻近出口（84）的细长的渐渐锥形的漏斗状部分（80），使惰性气体介质的作用最大化。
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公开(公告)号：EP0067093B1
公开(公告)日：1985-04-03
申请号：EP82400906.2
申请日：1982-05-17
CPC分类号： C21C5/36 , C21B3/06 , C21C7/064 , Y02W30/543
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公开(公告)号：EP0067093A1
公开(公告)日：1982-12-15
申请号：EP82400906.2
申请日：1982-05-17
CPC分类号： C21C5/36 , C21B3/06 , C21C7/064 , Y02W30/543
摘要： Procédé de traitement de laitiers phosphurés obtenus par affinage d'un bain de métal en fusion, tel que l'acier. Le procédé selon l'invention consiste à oxyder à chaud le laitier en lui incorporant après affinage un adjuvant solide pulvérisé fortement oxydant et aisément fusible au contact du laitier.
Parmi les adjuvants utilisables figurent de préférence les carbonates de métaux alcalins ou alcalino-terreux, et en particulier le carbonate de sodium qui, de surcroît, est un produit couramment utilisé dans le domaine de l'élaboration des métaux, notamment en sidérurgie.
L'invention assure une passivation rapide du laitier en stabilisant les phosphures sous forme de phosphates et permet ainsi d'éviter un dégagement de phosphine très toxique qui se produirait naturellement par hydrolyse à froid.-
公开(公告)号：EP2522758B1
公开(公告)日：2018-11-28
申请号：EP10842168.6
申请日：2010-12-08
摘要： [Problem] To provide an operation method for noticeably prolonging the life of "rotor" where the impeller and the axial rod are integrated with each other, in mechanical stirring of chrome-containing molten iron. [Means for Resolution] An operation method for mechanically stirring chrome-containing molten iron, which comprises a refining process of mechanically stirring chrome-containing molten iron contained in a refining vessel by the use of an impeller having a rotation axis in the vertical direction where the refining vessel is such that the horizontal cross section of the inner wall thereof is circular around the central axis of the vessel in the vertical direction and the impeller, as integrated with the axial rod covered with a refractory, rotates around the central axis of the axial rod, as the rotation axis thereof, wherein: the stirring mode is regularly or irregularly switched, as selected for each stirring charge, between "concentric stirring mode" of stirring the molten iron in a state where the rotation axis of the impeller is centered in the central axis of the vessel and "eccentric stirring mode" of stirring the molten iron in a state where the rotation axis of the impeller is decentered from the central axis of the vessel.
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公开(公告)号：EP2722405B1
公开(公告)日：2018-10-10
申请号：EP12823682.5
申请日：2012-08-08
发明人： KINOSHIRO, Satoshi , ITO, Toshiyuki , KAWABATA, Ryo , ISHIGE, Toshiro , FUJIMOTO, Kyoko , INOSE, Masao
IPC分类号： G01N33/00 , C21C7/064 , C21C7/00 , G01N21/64 , G01N31/00 , F27D21/00 , F27D19/00 , C21C7/10 , C21C7/06
CPC分类号： C21C7/0645 , C21C1/02 , C21C7/0006 , C21C7/0037 , C21C7/0075 , C21C7/0087 , C21C7/06 , C21C7/064 , C21C7/10 , C21C2007/0093 , C21C2300/08 , F27D19/00 , F27D21/00 , G01N21/64 , G01N21/645 , G01N33/0042 , Y02A50/248
摘要： There are provided a method for desulfurizing molten steel, characterized in that a sample taken out from molten steel after the tapping from a converter or during the secondary refining is analyzed rapidly in a high accuracy by a method comprising a high frequency induction heating step wherein the sample is combusted and oxidized under the high frequency induction heating in a pure oxygen atmosphere to convert S in the sample into SO 2 and an analyzing step wherein SO 2 -containing gas produced in the high frequency induction heating step is analyzed through an ultraviolet fluorescence method to quantify S concentration of the sample, whereby S concentration of molten steel after the tapping from the converter can be controlled in a high accuracy to prevent failure of S concentration and also desulfurization time in the secondary refining can be shortened and the amount of the desulfurizer or the like used can be reduced, and a method of manufacturing molten steel by using such a method.
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公开(公告)号：EP2907880B1
公开(公告)日：2018-05-16
申请号：EP13845014.3
申请日：2013-09-09
申请人： POSCO
发明人： SONG, Min Ho , KIM, Wook , KANG, Soo Chang , HAN, Woong Hee , PARK, Jung Ho
摘要： The present invention concerns to an impellor for stirring a melt pool and concerns a melt-pool processing method using same. The impellor includes: an impellor body extending in the length direction; a blowing nozzle which is provided in such a way as to pass through one part at the bottom end of the impellor body; and a blade provided on the upper part of the impellor body. As a result, when embodiments of the present invention are used, a stirring flow produced due to the blade and a stirring flow due to substances blown into the melt-pool via the blowing nozzle correspond to each other, and the two flows are combined such that the overall stirring force is improved. Consequently, it is possible to improve the efficiency of stirring by the impeller as compared with hitherto, and, as a result, refining efficiency in the refining step is improved as the rate of reaction between the melt-pool and additives is increased.
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88.发明授权
公开(公告)号：EP2889385B1
公开(公告)日：2018-04-04
申请号：EP13830632.9
申请日：2013-08-20
发明人： WU, Liping , SHEN, Chang , HU, Yuchang , PAN, Yuanwang , PU, Shaomin , WANG, Yong , XIE, Yangguo
IPC分类号： C21C7/10
摘要： The present invention discloses a straight barrel type vacuum refining device comprising a vacuum chamber and a snorkel; during the vacuum refining the snorkel is inserted into the molten steel of the steel ladle, it is characterized in that, disposing a circulating tube being on the circumference of said snorkel, and blowing argon gas into the snorkel through the nozzles on an inner wall of a circulating tube; said circulating tubes are disposed in layers, the nozzles on the circulating tubes in the same layer are individually controlled as 2-6 in one group; disposing an eccentric gas permeable brick at the bottom of said steel ladle, and blowing argon gas into the steel ladle through the eccentric gas permeable brick, driving a circulating flow molten steel between the steel ladle and the vacuum chamber by using different blowing flow rate combinations of a steel ladle bottom blowing and each individually controlled unit of the circulating tube blowing system. The operation method of the straight barrel type vacuum refining device is: the vacuum refining process uses a combined blown mode of steel ladle bottom eccentric gas permeable brick and the circulating tube of the snorkel, during decarburization the bottom blowing and the circulating tube on the same side as the bottom blowing are strong blowing, and the circulating tube on the other side is weak blowing; during desulfurization, the bottom blowing is strong blowing, and the circulating tubes around the snorkel are all weak blowing.
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89.发明授权METHOD FOR CONTROLLING A SEGREGATION OF STEEL INGOTS BY PURIFICATION OF MOLTEN STEEL 有权通过纯化熔融钢来控制钢锭偏差的方法
公开(公告)号：EP2876171B1
公开(公告)日：2017-12-06
申请号：EP12878213.3
申请日：2012-10-15
发明人： LI, Dianzhong , FU, Paixian , LIU, Hongwei , Xia, Lijun , LI, Yiyi
CPC分类号： C21C7/064 , C21C7/0075 , C21C7/06 , C21C7/0645 , C21C7/076 , C21C7/10 , C22C38/22 , C22C38/40 , Y02P10/242
摘要： A method for controlling A-shaped segregation of steel ingot. The method includes: 1) controlling a content of phosphorus in liquid steel at less than or equal to 0.005 wt. % upon tapping from an electric furnace, preventing steel slag from entering a ladle, controlling content of harmful elements at less than or equal to 100 ppm; and adding between 3 and 15 kg of calcium oxide and less than or equal to 0.5 kg of aluminum to each ton of the liquid steel; 2) pre-deoxidizing the liquid metal using vacuum carbon deoxidation; 3) de-sulfurizing, controlling content of oxygen, and controlling the content of sulfur in the liquid steel at less than or equal to 0.005 wt. %; and 4) performing vacuum degasification, controlling the total oxygen content at less than or equal to 15 ppm; and casting the steel in the presence of inert gas or in vacuum.
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公开(公告)号：EP2522758A4
公开(公告)日：2017-03-01
申请号：EP10842168
申请日：2010-12-08
申请人： NISSHIN STEEL CO LTD
摘要： [Problem] To provide an operation method for noticeably prolonging the life of "rotor" where the impeller and the axial rod are integrated with each other, in mechanical stirring of chrome-containing molten iron. [Means for Resolution] An operation method for mechanically stirring chrome-containing molten iron, which comprises a refining process of mechanically stirring chrome-containing molten iron contained in a refining vessel by the use of an impeller having a rotation axis in the vertical direction where the refining vessel is such that the horizontal cross section of the inner wall thereof is circular around the central axis of the vessel in the vertical direction and the impeller, as integrated with the axial rod covered with a refractory, rotates around the central axis of the axial rod, as the rotation axis thereof, wherein: the stirring mode is regularly or irregularly switched, as selected for each stirring charge, between "concentric stirring mode" of stirring the molten iron in a state where the rotation axis of the impeller is centered in the central axis of the vessel and "eccentric stirring mode" of stirring the molten iron in a state where the rotation axis of the impeller is decentered from the central axis of the vessel.
摘要翻译： 为了提供一种显着延长叶轮和轴杆彼此结合的“转子”寿命的操作方法，在含铬铁水的机械搅拌中。 [解决方法]一种用于机械搅拌含铬铁水的操作方法，其包括通过使用在垂直方向上具有旋转轴的叶轮机械搅拌包含在精炼容器中的含铬铁水的精炼方法， 精炼容器使得其内壁的水平截面在垂直方向上围绕容器的中心轴线是圆形的，并且与被覆盖有耐火材料的轴向杆一体化的叶轮绕着中心轴线旋转 轴向杆作为其旋转轴，其中：在叶轮的旋转轴线在中心的状态下，在搅拌铁水的“同心搅拌模式”之间，对于每个搅拌装料，搅拌模式被规则地或不规则地切换 在容器的中心轴线和在叶轮的旋转轴线为d的状态下搅拌铁水的“偏心搅拌模式” 以船舶的中心轴为中心。
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