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Technical method for electrolytic aluminium under 3.5 V cell voltage

A process method and technology for electrolysis of aluminum, applied in the process field of electrolysis of aluminum under the voltage of 3.5V cell, can solve the problems of high voltage and high energy consumption of the electrolysis cell, reduce the pole distance and avoid the aggravation of the secondary oxidation reaction. Effect

Inactive Publication Date: 2011-04-13
重庆天泰铝业有限公司
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Problems solved by technology

[0009] Aiming at the above-mentioned deficiencies in the prior art, the purpose of the present invention is to solve the problem that the electrolytic cell voltage is high due to the large anode distance in the process of electrolytic aluminum, so that the energy consumption of the electrolytic process is too large, and to provide a method that can be used in a 3.5V cell Process method of electrolytic aluminum under voltage

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  • Technical method for electrolytic aluminium under 3.5 V cell voltage
  • Technical method for electrolytic aluminium under 3.5 V cell voltage
  • Technical method for electrolytic aluminium under 3.5 V cell voltage

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0024] Such as figure 2 Shown, a kind of process method of electrolytic aluminum under 3.5V tank voltage, its steps are as follows:

[0025] 1) The cathode 3 is installed at the bottom of the electrolytic cell, the upper surface of the cathode 3 is provided with at least one raised cathode beam 12, the width of the cathode beam 12 is 15cm, 18cm, 20cm or 25cm, and the height is 10cm, 12cm, 13cm or 15cm;

[0026] 2) Install the anode 4 on the upper part of the electrolytic cell. The anode 4 is an anode carbon block with 8 to 13 air guide holes, preferably 12. The air guide holes 5 are arranged in the vertical direction and are large Lower small tapered hole;

[0027] 3) Inject 950°C molten electrolyte into the electrolytic cell, and make both cathode 3 and anode 4 contact with the electrolyte solution;

[0028] 4) Dissolve solid alumina ...

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Abstract

The invention provides a technical method for electrolytic aluminium under 3.5 V cell voltage, comprising the following steps: 1) installing at least one raised cathode of a cathode raised beam at the bottom of an electrolytic cell, wherein the width of the cathode raised beam is 15-25cm, and the height of the cathode raised beam is 10-15cm; 2) installing an anode with 8-13 air holes on the upper part of the electrolytic cell, wherein the air holes are arranged along the vertical direction and are tapered holes with bigger upper parts and smaller lower parts; 3) injecting molten electrolytes with the temperature of 950 DEG C in the electrolytic cell, and enabling the cathode and the anode to contact with the electrolyte solution; 4) dissolving sold alumina in the molten electrolytes, and introducing direct current from the anode; and 5) pumping the aluminum solution out of the electrolytic cell via a vacuum ladle, purifying and casting to obtain metallic aluminium. By utilizing the technical method in the invention, the problem of oversized thickness of an electrolytic interlayer in the electrolytic cell is solved, the cell voltage is reduced to 3.3-3.60V, and the current drain index for per ton of electrolytic aluminium is reduced by 1000kwh.

Description

technical field [0001] The invention relates to a process method for electrolyzing aluminum, in particular to a process method for electrolyzing aluminum at a cell voltage of 3.5V. [0002] Background technique [0003] The production of electrolytic aluminum is usually in such as figure 1 It is carried out in the electrolytic cell shown. The traditional process method is to dissolve solid alumina in the molten electrolyte at about 950 ° C, pass direct current from the anode, and the current passes through the liquid electrolyte and cathode aluminum liquid to the cathode carbon block, and then from the anode to the cathode carbon block. The cathode steel rod leads to the anode of the next electrolysis cell, where as the current passes through the liquid electrolyte layer, it electrochemically reacts with the alumina ions dissolved in the electrolyte. On the one hand, carbon dioxide gas is generated on the surface of the anode, and on the other hand, liquid aluminum is gene...

Claims

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Application Information

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IPC IPC(8): C25C3/06C25C3/08
Inventor 田应甫汪航
Owner 重庆天泰铝业有限公司
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