Cell cavity rectifying and alloy changing method for refined aluminum electrolysis cells
An electrolytic cell and refined aluminum technology, which is applied in the field of changing alloys and regulating the chamber of refined aluminum electrolytic cells, can solve problems such as prone to bias current, increased current density, and long recovery time, so as to increase the output of refined aluminum and reduce power consumption , The effect of reducing power consumption
Active Publication Date: 2016-10-12
石河子众和新材料有限公司
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Problems solved by technology
[0002] With the continuation of refined aluminum production, the enrichment of Fe, Si and other impurity elements in the refined aluminum electrolytic cell will cause the aging of the alloy, and the length of the side of the refined aluminum electrolytic cell will cause the conductive area of the refined aluminum electrolytic cell to shrink on the one hand. The current density increases. On the other hand, due to the irregular length of the side of the tank, the current distribution of the refined aluminum electrolytic cell is uneven, and the bias current phenomenon is prone to occur.
These problems will have an impact on the production of high-quality refined aluminum liquid by the refined aluminum electrolytic cell
In the previous work, when the alloy of the refined aluminum electrolytic cell is aging or the side of the cell is long, the method of hanging graphite cathodes is used to regularize the cell chamber and replace the alloy. The existing methods have the following problems: 1. Regularizing the groove and changing the alloy takes a long time, usually 7 days
2. Refined aluminum liquid is not produced during the period of regular tank bore and alloy change, the working voltage of the refined aluminum electrolytic cell is relatively high, about 10V, and the comprehensive power consumption of the refined aluminum electrolytic cell is relatively high
3. After finishing the work of regularizing the tank and changing the alloy, the working voltage of the refined aluminum electrolytic cell is relatively high, generally around 6V, and the recovery time is relatively long. It usually takes 3 months to return to the normal control range
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Embodiment 1
[0034] A method for regulating the chamber of a refined aluminum electrolytic cell and changing alloys, the specific operations are as follows:
[0035] 1. Withdrawal of aluminum
[0036] 1.1 According to the plan of replacing alloys with regular tanks, replace the regular tanks with alloy refined aluminum electrolytic cells, increase the electrolyte level and temperature, control the height of the electrolyte to 9-10cm, control the temperature at 740-760°C, and clean up the surrounding slag;
[0037] 1.2 Notify the finished product workshop to carry out the matching and packaging of aluminum, and prepare the tools for removing aluminum;
[0038] 1.3 Use a vacuum bag to extract the refined aluminum liquid in the refined aluminum electrolytic cell, pour it into an open bag and transport it to the finished product workshop. During the aluminum extraction process, when the aluminum level drops to about 15cm, the refined aluminum electrolytic cell is powered off, the electrodes a...
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The invention discloses a cell cavity rectifying and alloy changing method for refined aluminum electrolysis cells. The method comprises the steps of in the first day, removing aluminum, installing a graphite cathode, pouring electrolyte solutions into the refined aluminum electrolysis cell, extracting alloy in a power-supplied and heated mode and covering the surfaces of electrolytes with aluminum; in the second day, rectifying a cell cavity and carrying out purification; and in the third day, changing the aluminum. According to the method, the working time for cell cavity rectifying and alloy changing for each aluminum electrolysis cell is shortened to be shorter than 3 days from 7 days required by the original technology, and therefore the power consumption can be reduced, and the capacity of refined aluminum can be increased; the time for recovering the cell voltage after the cell cavity rectifying and alloy changing work of the refined aluminum electrolysis cells is completed is shortened to be shorter than 1 month from 3 months controlled by the original technology, the cell voltage can be lowered to be lower than 4.3 V, and the power consumption can be reduced.
Description
technical field [0001] The invention relates to a method for regularizing the bore of a refined aluminum electrolytic cell and changing alloys. Background technique [0002] With the continuation of refined aluminum production, the enrichment of Fe, Si and other impurity elements in the refined aluminum electrolytic cell will cause the aging of the alloy, and the length of the side of the refined aluminum electrolytic cell will cause the conductive area of the refined aluminum electrolytic cell to shrink on the one hand. The current density increases, and on the other hand, due to the irregular length of the side of the cell, the current distribution of the refined aluminum electrolytic cell is uneven, and the bias current phenomenon is prone to occur. These problems will have an impact on the production of high-quality refined aluminum liquid by the refined aluminum electrolytic cell. In the previous work, when the alloy of the refined aluminum electrolytic cell is aging...
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Login to View More IPC IPC(8): C25C3/06C25C3/20
CPCC25C3/06C25C3/20
Inventor 薛银喜翟进江王永庆
Owner 石河子众和新材料有限公司