Joint production method of electrolytic copper-aluminium alloy and refined aluminium

A joint production, copper-aluminum alloy technology, which is applied in the technical field of combining the electrolytic production of aluminum-copper alloy and the refined aluminum smelting production process, can solve the problems of non-existent production process methods, avoid production risks, improve current efficiency, and reduce The effect of production costs

Active Publication Date: 2010-04-28
GUIZHOU BRANCH CHINA ALUMINUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process cores are only connected through ex-factory products, which is similar to the relationship between the upstream and downstream of the industrial chain, and there is no joint production process method

Method used

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  • Joint production method of electrolytic copper-aluminium alloy and refined aluminium
  • Joint production method of electrolytic copper-aluminium alloy and refined aluminium

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Experimental program
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Effect test

Embodiment 1

[0026] The original production uses 160KA electrolytic cell, the voltage fluctuation range is 3.95~4.2V, the average cell voltage is 4.05V; the cathode current density is controlled at 0.65~0.75A / cm 2 , the fluctuation range of cathode current efficiency is 86% to 92%, the average current efficiency is 90.2%, the DC power consumption per ton of aluminum reaches 13240kW·h, and the product is primary aluminum.

[0027] Add 2% copper or waste aluminum-copper alloy (calculated by copper weight) in the cathode aluminum solution. After the production is stable, the cathode current density is maintained at 0.65-0.75A / cm 2 , the single cell voltage drops to 3.9-4.1V, the average cell voltage is 4.02V, the instantaneous current efficiency is increased to 95%, the fluctuation range is 88-93%, the average current efficiency is 90.8%, and the DC power consumption per ton of aluminum is reduced to 13200kW·h, the product is 2% aluminum-copper master alloy. The 2% aluminum-copper alloy pro...

Embodiment 2

[0029] The original production uses 160KA electrolytic cell, the voltage fluctuation range is 3.95~4.3V, the average cell voltage is 4.10V; the cathode current density is controlled at 0.65~0.75A / cm 2 , the fluctuation range of cathode current efficiency is 88% to 94%, the average current efficiency is 91.2%, the DC power consumption per ton of aluminum reaches 13400kW·h, and the product is primary aluminum.

[0030] The embodiment is as follows: about 5% of the total weight of copper or waste aluminum-copper alloy (calculated by copper weight) is added to the cathode aluminum liquid. After the production is stable, the cathode current density is maintained at 0.65-0.75A / cm 2 , the single cell voltage drops to 3.7-4.1V, the average cell voltage is 3.90V, the instantaneous current efficiency increases to 95%, the fluctuation range is 90-95%, the average current efficiency is 92.8%, and the DC power consumption per ton of aluminum drops to 12700kW·h, the product is 5% aluminum-...

Embodiment 3

[0032] The original production uses 160KA electrolytic cell, the voltage fluctuation range is 4.05~4.5V, the average cell voltage is 4.15V; the cathode current density is controlled at 0.65~0.75A / cm 2 , the fluctuation range of cathode current efficiency is 90% to 95%, the average current efficiency is 91.8%, the DC power consumption per ton of aluminum reaches 13560kW·h, and the product is primary aluminum.

[0033] The embodiment is as follows: about 10% of total weight of copper or waste aluminum-copper alloy (calculated by copper weight) is added to the cathode aluminum liquid. After the production is stable, the cathode current density is maintained at 0.65-0.75A / cm 2 , the single cell voltage drops to 3.7-4.2V, the average cell voltage is 3.95V, the instantaneous current efficiency increases to 96.7%, the fluctuation range is 91-97%, the average current efficiency is 93.7%, and the DC power consumption per ton of aluminum drops to 12550kW·h, the product is 10% aluminum-...

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Abstract

The invention provides a joint production method of electrolytic copper-aluminium alloy and refined aluminium and relates to a production process with jointed production process of copper-aluminium alloy and refined aluminium which are produced with an electrolytic method; the joint production method is characterized in that: the method comprises the following steps: (1) copper or copper-aluminium alloy is added in an aluminium electrolytic tank for electrolysis, so as to obtain the copper-aluminium alloy; (2) the copper-aluminium alloy obtained by electrolysis is used as refining flux to carry out virgin aluminum refining process, so as to obtain the refined aluminium; (3) the waste copper-aluminium alloy produced in the virgin aluminum refining process is returned to the step (1) to carry out copper-aluminium alloy electrolysis. The method can reduce copper-aluminium alloy production energy consumption, improve the recovery rate of finished products, reduce the material flow rate in the production and reduce the financial cost.

Description

technical field [0001] The invention relates to a combined production method of electrolytic copper aluminum alloy and refined aluminum, which relates to a combined process of electrolytic production of aluminum copper alloy and refined aluminum smelting production process. Background technique [0002] At present, the electrolysis method is the only method for the production of industrial aluminum ingots, but the energy consumption of this method is high, and its power consumption is as high as 13000kW·h / ton of aluminum, the cell voltage is 4.0V, and the current efficiency is about 90%. Due to the continuous rise of energy prices, the pressure on the production cost of primary aluminum is increasing. How to reduce power consumption has become a common problem in the industry. [0003] In order to reduce the cost of electrolytic aluminum plants, lengthen the industrial chain, and increase product types, many primary aluminum plants no longer leave the factory in the form of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C3/24C25C3/36
Inventor 黄海波邱仕麟罗丽芬徐建华秦庆东
Owner GUIZHOU BRANCH CHINA ALUMINUM IND
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