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    • 2. 发明授权
    • Method of heating molten steel by arc process
    • 电弧加工钢水的方法
    • US4650517A
    • 1987-03-17
    • US868807
    • 1986-05-29
    • Teruyuki HasegawaSeigo KuwanoRyuji YamaguchiKazuhiko Matsuo
    • Teruyuki HasegawaSeigo KuwanoRyuji YamaguchiKazuhiko Matsuo
    • C21C5/52C21C7/00C21C7/072C22B4/00
    • C21C5/52C21C7/0075C21C7/072C21C7/0056Y02P10/216
    • Three electrodes are dipped into slag on molten steel in a ladle. The electrodes are connected to a three-phase AC voltage. An arc is formed between each electrode and molten steel upon energizing the electrodes. The molten steel is heated by arc heat. Each electrode has a gas flow path extending longitudinally along its center. The gas flow path is open at the lower end of each electrode to constitute a gas injection port. Ar gas is injected from the gas injection port through the gas flow path. Nitrogen is removed from the arc region between the electrodes and the molten steel and its peripheral region to prevent the nitrogen pickup phenomenon of molten steel. If a powder mixture of chromium ore and carbon is added to the Ar gas, chromium ore is reduced by carbon with arc heat to add reaction product of chromium to the molten steel. If a flux powder is added to the Ar gas, the flux is melted and slagged by the arc heat.
    • 三个电极浸入钢包中的钢水中的炉渣中。 电极连接到三相交流电压。 在对电极通电时,在每个电极和钢水之间形成电弧。 钢水通过电弧加热。 每个电极具有沿其中心纵向延伸的气体流路。 气体流路在每个电极的下端开口以构成气体注入口。 从气体注入口通过气体流动路径注入Ar气体。 从电极和钢水及其周边区域之间的电弧区域去除氮气,以防止钢水的氮吸收现象。 如果将铬矿石和碳的粉末混合物加入到Ar气中,则铬矿用电弧加热还原,以加入铬与钢水的反应产物。 如果向Ar气中加入焊剂粉末,则焊剂熔化并通过电弧加热排渣。
    • 3. 发明授权
    • Apparatus for arc-melting cold iron source and method thereof
    • 电弧冷铁源装置及其方法
    • US06597722B2
    • 2003-07-22
    • US09775153
    • 2001-02-01
    • Hideaki MizukamiRyuji YamaguchiNorio AoToshimichi Maki
    • Hideaki MizukamiRyuji YamaguchiNorio AoToshimichi Maki
    • F27D1300
    • C21C5/565F27B3/06F27B3/065F27B3/085F27B3/186F27B3/225F27D3/0027F27D3/1509F27D13/002F27D2003/161F27D2003/168Y02P10/216
    • The present invention provides an arc-melting apparatus, which attains extremely high efficiency by preheating scraps using exhaust gas from the melting chamber. The arc-melting apparatus needs for no device to carry and supply an iron source to a melting chamber, which makes it possible to preheat the next charge. The arc-melting apparatus has a melting furnace which melts scraps, a preheating shaft connected directly to an upper part of one side of the melting furnace, an arc electrode for melting scraps in the melting furnace, a bucket for supplying scraps to the preheat shaft so as to continuously maintain scraps in the melting furnace and in the preheating shaft, a tapping portion having a tapping hole, being projected outward from the melting furnace and a tilting device for tilting the melting furnace on a side of the tapping portion. The tapping portion is arranged at an orthogonal direction to the direction of the supplied cold iron source. The preheating shaft of the melting furnace and the tapping portion have a distance between the mutual part, so that scraps do not flow out on a the tapping hole side.
    • 本发明提供了一种电弧熔化装置,其通过使用来自熔化室的废气预热废料而获得极高的效率。 电弧熔化装置不需要装置将铁源运送和供应到熔化室,这使得可以预热下一次充电。 该电弧熔融装置具有:熔融炉的熔化炉,直接与熔融炉一侧的上部连接的预热轴,熔融炉内的熔融物用的电弧电极,向预热轴供给废料的斗 以便在熔化炉和预热轴中连续地保持废料,具有从熔炉向外突出的出钢孔的攻丝部分和用于使熔化炉在出钢部分侧倾斜的倾斜装置。 攻丝部分配置在与供应的冷铁源方向正交的方向上。 熔化炉的预热轴和攻丝部分在相互的部分之间具有距离,使得废料在出钢孔侧不流出。