Energy saving and consumption reduction method of aluminum reduction cell

An aluminum electrolytic cell and electrolytic cell technology, applied in the field of aluminum electrolysis, can solve the problems of high electrolyte voltage, high power consumption of electrolytic cell, unstable electrolytic cell, etc., and achieve the effects of reducing fluctuation, improving power utilization rate, and reducing pole distance

CN101768759BActive Publication Date: 2011-09-28SHENYANG ALUMINIUM MAGNESIUM INSTITUTE
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2011-09-28

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Abstract

The invention discloses an energy saving and consumption reduction method of an aluminum reduction cell, which is applicable to the aluminum reduction cell with current intensity higher than 60 kA. The invention comprises a retaining block which is placed on a cathode carbon block, and the retaining block can be one block or a plurality of blocks according to the size of cell capacity. The retaining block can be horizontally placed along the major axis direction or the minor axis direction of the reduction cell, the other parts at the lower part of the retaining block except support legs are opened, the height of the retaining block is not beyond the height of a molten aluminum layer of the reduction cell. In the invention, owning to the existence of the retaining block, the fluctuation in the molten aluminum layer is decreased, the polar distance is reduced, the cell voltage is decreased significantly, and the electric energy efficiency is increased.
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Description

technical field

[0001] The invention relates to a method for saving energy and reducing consumption of an aluminum electrolytic cell, which is suitable for an aluminum electrolytic cell with a current intensity above 60kA and belongs to the technical field of aluminum electrolysis. Background technique

[0002] The Hall-Heroult electrolyser currently used for aluminum industry production uses a carbon anode and a carbon block at surface level as the cathode to produce aluminum by electrolysis of alumina. The electrolyte mainly consists of cryolite and alumina melt with additional fluorine dissolved in it. Aluminum and other fluoride salts. The electrolytically separated aluminum is accumulated on the upper part of the cathode of the carbon block at the bottom of the tank, forming an aluminum liquid layer and serving as a part of the cathode.

[0003] In the existing Hall-Heroult aluminum electrolytic cell, about 50% of the electric energy is used for electrolytic production...

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Embodiment Construction

[0025] The embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited by the embodiments.

[0026] like Figure 1~3 As shown, the method for saving energy and reducing consumption of the aluminum electrolytic cell of the present invention is to place several stoppers 2 on the aluminum liquid layer on the upper surface of the cathode carbon block 1 . More specifically, the block 2 is placed horizontally on the aluminum liquid layer on the upper surface of the cathode carbon block 1 along the long axis or short axis of the electrolytic cell.

[0027] The density of the block 2 is greater than that of the molten aluminum. The height of the stopper 2 is less than or equal to the height of the aluminum liquid layer. The width of the block 2 is smaller than that of the cathode carbon block. The length of the stopper 2 is less than or equal to the size of the...