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    • 72. 发明专利
    • Method for estimating thickness of electric furnace slag coating by unsteady heat transfer analysis
    • 通过不对称热传递分析估算电炉渣涂层厚度的方法
    • JP2009085549A
    • 2009-04-23
    • JP2007258466
    • 2007-10-02
    • Sumitomo Metal Mining Co Ltd住友金属鉱山株式会社
    • ENDO SHUJITANABE AKIHIROMORI YOSHIAKI
    • F27D21/00C21B11/10C21B13/12C21C5/52
    • Y02P10/216
    • PROBLEM TO BE SOLVED: To provide a heat transfer analysis method for accurately estimating the thickness of a slag coating at an electric furnace side wall by an unsteady heat transfer analysis. SOLUTION: In the method, the furnace side wall is modeled using a finite element method, the unsteady heat transfer analysis is performed from a heat flow amount from the inside to the outside of the furnace and a measured temperature of a furnace wall brick, and the thickness of the slag coating of the side wall is estimated from the obtained analyzed result. By treating the physical property of the slag coating portion in the finite element model as molten slag when a temperature reaches a slag melting point temperature or higher and as solidified slag when the temperature is lower than a slag melting point, and setting the specific heat of the molten slag 0 kJ/kg*°C, an influence on a heat passage to the molten slag is eliminated and a face that is a border between the molten slag and the solidified slag becomes a face for constantly receiving a thermal load. COPYRIGHT: (C)2009,JPO&INPIT
    • 要解决的问题:提供一种用于通过不稳定的热传递分析精确估计电炉侧壁的炉渣涂层的厚度的传热分析方法。 解决方案:在该方法中,使用有限元法对炉侧壁进行建模,从炉内的热流量和炉壁的测量温度进行不稳定的热传递分析 砖,并且从获得的分析结果估计侧壁的熔渣涂层的厚度。 当温度达到炉渣熔点或更高温度时,通过将有限元模型中的炉渣涂层部分的物理性质作为熔渣处理,并且当温度低于熔渣熔点时将其作为固化炉渣,并将 熔渣0kJ / kg *℃,消除了对熔渣的热通道的影响,并且作为熔渣和固化渣之间的边界的面成为不断接受热负荷的面。 版权所有(C)2009,JPO&INPIT
    • 73. 发明专利
    • Method for ladle-refining stainless steel
    • 不锈钢精炼方法
    • JP2009057612A
    • 2009-03-19
    • JP2007227180
    • 2007-08-31
    • Sanyo Special Steel Co Ltd山陽特殊製鋼株式会社
    • HATAYAMA TOSHIAKI
    • C21C7/04B22D1/00C21C5/52C21C7/00
    • Y02P10/216
    • PROBLEM TO BE SOLVED: To provide a method for reducing the charging quantity of Ca-Si wire by improving the charging rate of the Ca-Si wire and the yield of Ca addition in a method for adjusting the additional quantity of Ca by charging the Ca-Si wire into the molten steel in the operation of LF (Ladle Furnace)-refining stainless steel. SOLUTION: Scraps being raw materials are melted and refined in an electric furnace, and the obtained molten stainless steel is further ladle-refined. At the end stage of the refining, the Ca-Si wire is charged into the molten steel to perform the Ca-addition, thereby adjusting components of the molten steel. That is, the charging rate of the Ca-Si wire controlled to the optimal rate of 100 m/min, so that the charged Ca-Si wire is allowed to reach the bottom part of the ladle and is successively melted, thereby improving the yield of the Ca-additional quantity into the molten steel into the maximum of 6.7%. COPYRIGHT: (C)2009,JPO&INPIT
    • 解决的问题:提供一种通过提高Ca-Si线的充电率和Ca添加的收率来减少Ca-Si线的充电量的方法,用于通过以下方法调整附加量的Ca 在LF(钢包炉)精炼不锈钢的操作中,将Ca-Si钢丝装入钢水中。 解决方案:作为原料的废料在电炉中熔化和精制,所得到的熔融不锈钢进一步钢包精炼。 在精炼的最后阶段,将Ca-Si丝装入钢水中进行Ca添加,从而调节钢水的成分。 也就是说,将Ca-Si丝的充电速度控制在最佳速度为100m / min,使得带电的Ca-Si线被允许到达钢包的底部并连续地熔化,从而提高了产率 的Ca附加量进入钢水最多6.7%。 版权所有(C)2009,JPO&INPIT
    • 74. 发明专利
    • Dust control method for steel making reducing period slag
    • 用于钢制造减少周期的灰尘控制方法
    • JP2009018965A
    • 2009-01-29
    • JP2007183501
    • 2007-07-12
    • Hamada Heavy Industries Ltd濱田重工株式会社
    • FUJII TSUTOMUTSUCHIYA MORIO
    • C04B5/00C21C5/28C21C5/52C21C7/00F27D15/00F27D15/02
    • Y02P10/216
    • PROBLEM TO BE SOLVED: To provide a dust control method for a steel making reducing period slag which can economically and safely carry out the cooling of a molten slag of a reducing period without giving a bad effect to the circumstances. SOLUTION: The dust control method is as follows. After making the melting slag of the reducing period generated in a steel making process solidify by the standing to cool thereof, on the upper part of a solidified slag 10, cooling water of at least 0.4 m 3 /hour and at most 1.5 m 3 /hour per one m 2 of the slag, and at least 0.2 m 3 and at most 1.4 m 3 per one metric ton of the slag is sprinkled in the shape of a fog, and thereby the slag 10 is cooled inhibiting the develop of dust by the degradation of the slag 10. COPYRIGHT: (C)2009,JPO&INPIT
    • 解决的问题:提供一种能够经济地,安全地进行还原时期的熔渣冷却的炼钢减少炉渣的粉尘控制方法,而不会对环境造成不良影响。

      解决方案:灰尘控制方法如下。 在使炼钢工艺中产生的还原时间的熔渣通过静置冷却固化之后,在固化渣10的上部,至少0.4m 3 /小时/小时的冷却水 并且每1m 2 至少1.5m 3 / SP / s,以及至少0.2m 3 和至多1.4m 3 每一公吨矿渣以雾的形式喷洒,从而使渣10被冷却,从而通过炉渣10的劣化来抑制灰尘的产生。(C) 2009年,JPO&INPIT

    • 79. 发明专利
    • Arc furnace electrode lifting device
    • 弧焊电极提升装置
    • JP2008202867A
    • 2008-09-04
    • JP2007040208
    • 2007-02-21
    • Toshiba Mitsubishi-Electric Industrial System Corp東芝三菱電機産業システム株式会社
    • ASAKA TAKATOSHI
    • F27D11/08C21C5/52F27B3/20F27B3/28H05B7/148
    • Y02P10/216Y02P10/256Y02P10/259
    • PROBLEM TO BE SOLVED: To provide an arc furnace electrode lifting device capable of saving energy of furnace operation, and capable of shortening operation time. SOLUTION: This arc furnace electrode lifting device is composed of an impedance constant control means 82 controlling so that impedance between an electrode 4 and a scrap 5 becomes constant, a constant current control means 83 controlling so that an arc current becomes a preset value, a switching means 84 switching the impedance constant control means 82 and the constant current control means 83, an electric power consumption checking means 86 determining whether or not electric power consumption of an arc furnace becomes a predetermined value or more, a flicker checking means 87 determining whether or not a flicker quantity becomes a predetermined value or less for a predetermined time, a furnace state checking means 88 determining whether or not both arc voltage and the arc current become a predetermined value or less for a predetermined time, and an arithmetic operation means 89 arithmetically processing a determining result of the electric power consumption checking means 86, the flicker checking means 87 and the furnace state checking means 88. The switching means 84 is operated by a result of the arithmetic operation means 89. COPYRIGHT: (C)2008,JPO&INPIT
    • 要解决的问题:提供一种能够节省炉子操作能量并能够缩短操作时间的电弧炉电极提升装置。 解决方案:该电弧炉电极提升装置由控制电极4和废料5之间的阻抗变得恒定的阻抗常数控制装置82组成,恒定电流控制装置83控制电弧电流变为预设 值,开关装置84切换阻抗常数控制装置82和恒流控制装置83;电力消耗检查装置86,确定电弧炉的电力消耗是否达到预定值以上;闪烁检查装置 87确定预定时间内闪烁量是否变为预定值或更小,炉状态检查装置88确定电弧电压和电弧电流是否在预定时间内变为预定值或更小,以及算术 操作装置89对电力消耗检查装置86的确定结果进行算术处理,th e闪烁检查装置87和炉状态检查装置88.切换装置84由算术运算装置89的结果运行。版权所有:(C)2008,JPO&INPIT