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    • 5. 发明公开
    • METHOD FOR DECARBONIZATION REFINING OF CHROMIUM−CONTAINING MOLTEN STEEL
    • VERFAHREN ZUM ENTKOHLUNGSFRISCHEN VON CHROMHALTIGEMSCHMELZFLÜSSIGEMSTAHL
    • EP1403387A1
    • 2004-03-31
    • EP02741380.6
    • 2002-07-01
    • NIPPON STEEL CORPORATION
    • NAKAO, RyujiTANAKA, TomoakiIGARASHI, MasaoYOSHINO, Koichiro
    • C21C7/00C21C7/068C21C7/072C21C7/10
    • C21C7/0685C21B5/001C21C5/005C21C5/4673C21C7/072C21C7/10C21C2300/06Y02P10/286Y10S706/904
    • The present invention: solves the problems of hitherto disclosed technologies, such as insufficient suppression of the oxidation loss of [Cr] and the excessive erosion of refractories, in the decarburization-refining of chromium-contained molten steel under a normal or reduced pressure; and is characterized by: determining, in sequence; a molten steel temperature during the refining through actual measurement or computation from a molten steel temperature before the refining and refining conditions; [C] and [Cr] concentrations during the refining through actual measurement or computation from molten steel components before the refining and refining conditions; a CO partial pressure P CO in an atmosphere during the refining from the total pressure P of the atmosphere, an oxygen gas supply rate and an inert gas supply rate; a Hilty's equilibrium temperature T H from said [C] and [Cr] concentrations and P CO ; the difference ΔT between said molten steel temperature during the refining and said Hilty's equilibrium temperature T H : and controlling the refining conditions so that said ΔT is equal to a prescribed value or higher.
    • 在大气压或减压下对含铬钢水进行脱碳精炼包括通过实际测量或通过在精炼和精制条件之前从钢水的温度计算钢水的温度,确定[C ]和[Cr]浓度在精炼期间通过实际测量或通过在精炼和精炼条件之前的钢水组成的计算来确定在大气中的CO(PCO)在大气中的分压,从大气的总压力和 氧气和惰性气体的进料速率,基于上述[C]和[Cr]浓度和PCO确定钢水的Hilty平衡温度,确定熔融的上述温度的差(ΔT) 精炼期间的钢和Hilty平衡温度,并控制精炼条件,以使Delta T具有预先确定的 ed值或更多。
    • 8. 发明公开
    • VERFAHREN ZUM BETREIBEN EINES LICHTBOGENOFENS
    • EP2898104A2
    • 2015-07-29
    • EP13763247.7
    • 2013-09-17
    • SMS group GmbH
    • GRYGOROV, PavloODENTHAL, Hans-JürgenSCHULZE, StephanWEDELL, Tobias
    • C21C5/52F27B3/08F27D21/00G01F23/00H05B7/00
    • C21C5/5211C21C2005/5288C21C2300/02C21C2300/06F27B3/085F27D21/0028G01F23/28H05B7/148Y02P10/216Y02P10/256Y02P10/259Y02P10/286
    • The invention relates to a method for operating an arc furnace (1), wherein the arc furnace comprises a receiving vessel (2) for molten material (3) and also at least one electrode (4), wherein the electrode (4) is arranged on a carrier arm (5) and is held thereby, wherein a foamed slag former (C) is introduced into the receiving vessel (2) in order to form a layer of foamed slag (6) with a height (h) on the molten material (3). In order to determine the foamed slag height in an improved manner, and to thereby optimize the feed of the foamed slag former, the method comprises the following steps: a) determining a functional relationship (h = f (a)) between the oscillations of the electrode (4) or of the carrier arm (5) during operation of the arc furnace (1) and the height (h) of the foamed slag (6) by measurement; b) operating the arc furnace (1), the oscillations of the electrode (4) or of the carrier arm (5) being measured and, on the basis of these measured values, the height (h) of the foamed slag (6) being determined using the functional relationship (h = f (a)) determined in step a).
    • 本发明涉及一种用于操作电弧炉(1)的方法,其中电弧炉包括用于熔融材料的接收容器(2)和至少一个电极(4),其中电极(4)被布置 在承载臂(5)上并被保持在其中,其中将泡沫炉渣形成器(C)引入接收容器(2)中,以形成在熔融物上具有高度(h)的泡沫炉渣层(6) 材料(3)。 为了以改进的方式确定泡沫炉渣的高度,并且由此优化发泡炉渣成形器的进料,该方法包括以下步骤:a)确定振荡之间的函数关系(h = f(a)) 通过测量在电弧炉(1)的操作期间电极(4)或承载臂(5)和泡沫炉渣(6)的高度(h); b)操作电弧炉(1),测量电极(4)或载体臂(5)的振荡,并且基于这些测量值,发泡炉渣(6)的高度(h) 使用在步骤a)中确定的功能关系(h = f(a))来确定。
    • 10. 发明公开
    • VERFAHREN ZUR HERSTELLUNG VON GUSSEISEN MIT VERMICULARGRAPHIT UND GUSSTEIL
    • 葡萄牙语VERFAHREN ZUR HERSTELLUNG VON GUSSEISEN MIT VERMICULARGRAPHIT UND GUSSTEIL
    • EP2734651A1
    • 2014-05-28
    • EP11738170.7
    • 2011-07-22
    • Neue Halberg Guss GmbH
    • RADEBACH, Dirk
    • C21C1/08
    • C21C1/08C21C2300/06Y02P10/286
    • The invention relates to a method for producing cast iron, in particular cast iron having vermicular graphite, comprising the following steps: producing a melt; determining a sulfur content of the melt and determining a normal temperature-related oxygen activity of the melt; separating two parts of the melt as first and second test melts; and determining at least two points of the respective cooling curve of the test melts and adding an amount of inoculant in accordance with the determined points on the cooling curves by means of an inoculant formula. Said method is intended to improve the reliability of the formation of GJV from the melt. In particular, the invention thus specifies a correspondingly improved production method.
    • 本发明涉及生产铸铁的方法,特别是具有蠕墨铸铁的铸铁,包括以下步骤:制备熔体; 确定熔体的硫含量并确定熔体的正常温度相关氧活性; 分离熔融物的两部分作为第一和第二试验熔体; 并且确定所述测试的相应冷却曲线的至少两个点熔化,并且通过接种剂配方在冷却曲线上根据确定的点添加一定量的孕育剂。 所述方法旨在提高从熔体形成GJV的可靠性。 特别地,本发明因此指定了相应改进的生产方法。