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    • 2. 发明授权
    • Method for decarbonization refining of chromium-containing molten steel
    • 含铬钢水脱碳精炼方法
    • US06830606B2
    • 2004-12-14
    • US10482560
    • 2003-12-30
    • Ryuji NakaoTomoaki TanakaMasao IgarashiKoichiro Yoshino
    • Ryuji NakaoTomoaki TanakaMasao IgarashiKoichiro Yoshino
    • C21C7068
    • 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 PCO 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 TH from said [C] and [Cr] concentrations and PCO; the difference &Dgr;T between said molten steel temperature during the refining and said Hilty's equilibrium temperature TH: and controlling the refining conditions so that said &Dgr;T is equal to a prescribed value or higher.
    • 本发明解决了在正常或减压下含铬钢水的脱碳精炼中迄今为止公开的技术的诸如不充分抑制[Cr]的氧化损失和耐火材料过度侵蚀的技术的问题; 其特征在于:依次确定 精炼过程中的钢水温度在精炼和精炼条件之前由钢水温度进行实际测量或计算; 在精炼过程中,通过在精炼和精炼条件之前从钢水部件进行实际测量或计算,精炼中的[C]和[Cr]浓度; 来自大气的总压力P的精炼期间的气氛中的CO分压PCO,氧气供给速率和惰性气体供给速率,来自所述[C]和[Cr]浓度和PCO的Hilty的平衡温度TH; 在精炼期间的所述钢水温度与所述Hilty的平衡温度TH之间的差ΔTt,并控制精炼条件使得所述ΔT等于或等于规定值以上。
    • 5. 发明授权
    • Vacuum refining furnace
    • 真空精炼炉
    • US6162387A
    • 2000-12-19
    • US219
    • 1998-09-18
    • Kensuke ShimomuraTadashi ImotoMayumi OkimoriGaku OgawaTomoaki Tanaka
    • Kensuke ShimomuraTadashi ImotoMayumi OkimoriGaku OgawaTomoaki Tanaka
    • C21C5/28C21C7/10C22B9/04
    • C21C7/10C21C5/28C22B9/04Y10S266/903
    • A refining furnace used for vacuum refining has a sealing cover mounted on the refining furnace so as to cover the furnace throat of the refining furnace and to be in close contact with a sealing flange (10) formed on the refining furnace. The adhesion of metal and slag to the sealing flange is prevented without using any flange cover. A sealing flange (10) is formed on the outer surface of the refining furnace (1) at a position on a conical part (8) extending between the furnace throat (9) and a straight body part or on the straight body part. A slag-stopping dummy flange (11) is formed on the outer surface of the refining furnace (1) at a position between a furnace throat (9) and the sealing flange (10). The slag-stopping dummy flange (11) has an outer circumference lying on the inner side of the inner circumference of a sealing cover (4) and on the outer side of the inner circumference of a lower end part of a dust collecting hood for atmospheric refining.
    • PCT No.PCT / JP98 / 00821 Sec。 371日期:1998年9月18日 102(e)1998年9月18日PCT 1998年2月27日提交PCT用于真空精炼的精炼炉具有安装在精炼炉上的密封盖,以覆盖精炼炉的炉喉,并与 形成在精炼炉上的密封凸缘(10)。 在不使用任何法兰盖的情况下,可以防止金属和炉渣对密封法兰的粘附。 密封凸缘(10)在精炼炉(1)的外表面上形成在在炉喉(9)和直体部分之间或直体部分上延伸的锥形部分(8)上的位置处。 在炉膛(9)和密封凸缘(10)之间的位置,在精炼炉(1)的外表面上形成止渣假模法兰(11)。 防渣假凸缘(11)具有位于密封盖(4)的内周的内侧的外周和大气的集尘罩的下端部的内周的外侧 精制。
    • 10. 发明授权
    • Process for producing catalyst for &agr;-olefin polymerization, and process for producing &agr;-olefin polymer
    • 制备α-烯烃聚合催化剂的方法,以及α-烯烃聚合物的制备方法
    • US06703456B2
    • 2004-03-09
    • US10396508
    • 2003-03-26
    • Jiro MoriTomoaki TanakaYasunori Kaminaga
    • Jiro MoriTomoaki TanakaYasunori Kaminaga
    • C08F442
    • C08F10/00C08F110/06C08F4/6565C08F2500/18
    • A process (I) for producing an &agr;-olefin polymerization catalyst whereby (1) a titanium compound is reduced by an organomagnesium compound in the presence of an organosilicon compound to produce a reduction solid, (2) the reduction solid is aged to produce a solid product, (3) the solid product is contacted with an ether compound, titanium tetrachloride and an organic acid halide compound, to produce an organic acid halide-treated solid, (4) the organic acid halide-treated solid is contacted with a mixture of an ether compound, titanium tetrachloride and an ester compound, or with a mixture of an ether compound and titanium tetrachloride to produce a solid catalyst component containing a titanium compound, and (5) the solid catalyst component is contacted with an aluminum compound and an electron donor compound to produce a catalyst for &agr;-olefin polymerization. A process (II) for producing an &agr;-olefin polymer using a catalyst produced by process (I).
    • 一种用于制备α-烯烃聚合催化剂的方法(I),其中(1)钛化合物在有机硅化合物存在下由有机镁化合物还原以产生还原固体,(2)还原固体老化以产生 固体产物,(3)固体产物与醚化合物,四氯化钛和有机酰卤化合物接触,以制备有机酰卤处理的固体,(4)将有机酰卤处理的固体与混合物接触 的醚化合物,四氯化钛和酯化合物,或与醚化合物和四氯化钛的混合物制备含有钛化合物的固体催化剂组分,和(5)使固体催化剂组分与铝化合物和 电子给体化合物以产生用于α-烯烃聚合的催化剂。 使用由方法(I)制备的催化剂制备α-烯烃聚合物的方法(II)。