Electrolytic reduction cells
    1.
    发明授权
    Electrolytic reduction cells 失效
    电解还原细胞

    公开(公告)号:US4443313A

    公开(公告)日:1984-04-17

    申请号:US391404

    申请日:1982-06-23

    CPC分类号: C25C3/08

    摘要: In an electrolytic reduction cell for the production of molten metal, particularly aluminium, by electrolysis of a less dense salt monolayer of ceramic shapes is located on the floor of the cell. Such shapes are formed of a ceramic material, wettable by molten aluminium, but not wettable by the cell electrolyte. The spacing between adjacent shapes and/or the apertures in individual shapes is selected such that interfaced surface forces prevent entry of electrolyte between the shapes. The shapes may be tiles, honeycombs, cylinders, tubes, balls etc. The product metal may be collected in a sump for periodic withdrawal from the cell or withdrawn continuously or at short intervals through a selective filter that permits passage of molten metal, but not of molten cell electrolyte, at low withdrawal rates.

    摘要翻译: 在用于生产熔融金属,特别是铝的电解还原电池中,通过电解较小密度的陶瓷形状的单层单层位于电池的底板上。 这种形状由陶瓷材料形成,可由熔融铝润湿但不被电池电解质润湿。 选择相邻形状和/或各个形状的孔之间的间隔,使得界面表面力防止电解质在形状之间进入。 形状可以是瓷砖,蜂窝,圆柱体,管,球等。产品金属可以被收集在贮槽中以便从池中周期性地取出,或者通过允许熔融金属通过的选择性过滤器连续地或以短时间间隔地抽出 的熔融电解液,以低回收率。

    Carbothermic production of aluminium
    2.
    发明授权
    Carbothermic production of aluminium 失效
    碳化氢生产铝

    公开(公告)号:US4224059A

    公开(公告)日:1980-09-23

    申请号:US64583

    申请日:1979-08-07

    IPC分类号: C22B21/02

    CPC分类号: C22B21/02

    摘要: In a process for production of aluminium metal described in U.S. Pat. No. 4,099,959 carbon monoxide gas is evolved at very high temperature through reaction of aluminium carbide and alumina in a high temperature zone of the system. This gas is cooled by contact with a molten alumina slag at a lower temperature to cause back reaction of contained aluminium suboxide and Al vapor and consequent heat transfer to the contacted molten alumina slag.A body of molten alumina slag is maintained in a pretreatment zone, to which carbon and alumina feed are introduced and the carbon monoxide gas is led into the pretreatment zone. Excess slag, resulting from such introduction of feed and from gaseous back reaction, spills over into a low temperature zone of the system to augment the circulating slag stream.

    摘要翻译: 在美国专利中描述的生产铝金属的方法中, 第4,099,959号一氧化碳气体通过在系统的高温区域中的碳化铝和氧化铝的反应在非常高的温度下放出。 该气体通过在较低温度下与熔融氧化铝炉渣接触而冷却,从而引起所含的低氧化铝和Al蒸气的反向反应,从而导致接触的熔融氧化铝炉渣的热传递。 熔融氧化铝炉渣体保持在预处理区域中,碳和氧化铝进料被引入该预处理区域,一氧化碳气体被引入预处理区域。 由于这种进料和气态反应引入而产生的过量炉渣溢出到系统的低温区域以增加循环渣流。

    Molten salt electrolytic cell having metal reservoir
    3.
    发明授权
    Molten salt electrolytic cell having metal reservoir 失效
    具有金属储存层的熔盐电解槽

    公开(公告)号:US06579438B1

    公开(公告)日:2003-06-17

    申请号:US09720248

    申请日:2001-06-12

    IPC分类号: C25C308

    CPC分类号: C25C3/04 C25C7/005

    摘要: An electrolysis cell (10) for producing a molten metal having a density less than a density of a molten electrolyte used for producing the metal in the cell. The cell includes a section (14) for the electrolysis of a salt of the the metal contained in a molten electrolyte to form droplets of the metal in molten form contained in the electroylte; electrodes (18) within the electrolysis section for effecting the electrolysis; a metal recovery section (15) for separation of the metal from the electrolyte to form a molten metal layer, having an upper suface, floating on an upper surface of the molten electrolyte; a tapping device for periodically removing molten metal from the cell; and a reservoir (25) for withdrawal and temporary holding of molten metal separated from the electrolyte in the metal recovery section. The reservoir has a means to remove liquid from the reservoir without permanently removing the liquid from the cell. The reservoir has a top, sides and bottom and has one or more openings in the top or sides of the container communicating with the metal recovery section. At least part of the opening(s) is maintained below the upper surface (71) of the metal layer during at least part of normal cell operations, and all of the opening(s) is kept above the upper surface of the electrolyte in the metal recovery section for at least part of the normal cell operation. The sides and bottom are otherwise closed to prevent metal or electrolyte from freely flowing between the metal recovery section and the reservoir. The cell containing such a reservoir may accommodate high rates of metal production without unduly increasing cell size or requiring high heating requirements.

    摘要翻译: 一种用于生产密度小于用于在电池中制造金属的熔融电解质的密度的熔融金属的电解槽(10)。 电池包括用于电解包含在熔融电解质中的金属的盐的部分(14),以形成包含在电极中的熔融形式的金属液滴; 用于进行电解的电解部分内的电极(18); 金属回收部分(15),用于将金属与电解质分离以形成熔融金属层,具有漂浮在熔融电解质的上表面上的上表面; 用于周期性地从电池中去除熔融金属的攻丝装置; 以及用于在金属回收部分中从电解质分离的熔融金属的取出和临时保持的储存器(25)。 储存器具有从储存器中移除液体而不永久地从池中去除液体的装置。 储存器具有顶部,侧面和底部,并且在容器的顶部或侧面中具有与金属回收部分连通的一个或多个开口。 在正常电池操作的至少部分期间,至少部分开口保持在金属层的上表面(71)的下方,并且所有开口都保持在电解质的上表面之上 金属回收部分用于正常电池操作的至少一部分。 侧面和底部以其他方式封闭,以防止金属或电解质在金属回收部分和储存器之间自由流动。 包含这种储存器的电池可以容纳高速率的金属生产,而不会不适当地增加电池尺寸或需要高的加热要求。

    Multi-polar cell for the recovery of a metal by electrolysis of a molten
electrolyte
    4.
    发明授权
    Multi-polar cell for the recovery of a metal by electrolysis of a molten electrolyte 失效
    用于通过电解电解液回收金属的多极电池

    公开(公告)号:US5935394A

    公开(公告)日:1999-08-10

    申请号:US945303

    申请日:1998-01-13

    CPC分类号: C25C7/005

    摘要: An electrolytic cell for the recovery of metal from a molten electrolyte and an electrode assembly for use in such a cell. The cell (10) comprises an electrode assembly consisting of an anode (17), a cathode (19) and one or more bipolar electrodes (18) disposed between the anode and the cathode so as to form interpolar spaces (16) in which electrolysis occurs. In the electrode assembly, the bipolar electrode (if there is only one) or the innermost bipolar electrode (if there are more than one) substantially surrounds the anode and forms a single mechanical and electrical entity. The cathode in turn preferably substantially surrounds the one or more bipolar electrodes. The electrode assembly comprising the cathode and bipolar electrode(s) is preferably unitary, forming an electrode cassette that can be assembled outside a cell and then introduced into, or withdrawn from, the cell as a single self-supporting unit. Structures of this kind simplify cell fabrication and may lead to cells that operate with improved efficiency.

    摘要翻译: PCT No.PCT / CA95 / 00227 Sec。 371日期1998年1月13日 102(e)日期1998年1月13日PCT 1995年4月21日PCT PCT。 出版物WO96 / 33297 日期1996年10月24日用于从熔融电解液中回收金属的电解池和用于这种电池的电极组件。 电池(10)包括由阳极(17),阴极(19)和设置在阳极和阴极之间的一个或多个双极电极(18)组成的电极组件,以形成间极空间(16),其中电解 发生。 在电极组件中,双极电极(如果只有一个)或最内侧的双极电极(如果有多于一个)基本上围绕阳极并且形成单个机械和电气实体。 阴极又优选地基本上围绕一个或多个双极电极。 包括阴极和双极电极的电极组件优选是一体的,形成电极盒,其可以组装在电池外部,然后作为单个自支撑单元引入电池或从电池中取出。 这种结构简化了电池制造,并且可能导致以提高效率工作的电池。

    Electrolytic reduction cells
    5.
    发明授权
    Electrolytic reduction cells 失效
    电解还原细胞

    公开(公告)号:US4551218A

    公开(公告)日:1985-11-05

    申请号:US391410

    申请日:1983-06-23

    IPC分类号: C25C3/08 C25C7/00 C25B3/08

    CPC分类号: C25C3/08

    摘要: In an electrolytic reduction cell in which molten metal is produced by electrolysis of a molten electrolyte, less dense than the molten metal product, the molten product metal collects at the bottom of the cell. A filter is provided at this location and is constructed from a material which is resistant to attack by both the molten metal and molten electrolyte, and which is wetted by the molten metal, but not by the electrolyte. By correcting sizing of the passage or passages in the filter molten metal product can be drawn out of the cell without simultaneous withdrawal of molten electrolyte. In the case of a cell for the production of aluminium the filter is preferably constructed from titanium diboride.

    摘要翻译: 在通过电解熔融电解液而生成熔融金属的电解还原电池中,比熔融金属产物密度小的电解还原电池,在电池底部收集熔融产物金属。 在该位置处设置有过滤器,并且由熔融金属和熔融电解质抵抗而被熔融金属润湿而不被电解质润湿的材料构成。 通过校正过滤器中的通道或通道的尺寸,熔融金属产品可以从电池中抽出而不会同时抽出熔融的电解液。 在用于生产铝的电池的情况下,过滤器优选由二硼化钛构成。