Method for preparing prebaked aluminum cell fire eye
An aluminum electrolytic cell and fire eye technology, which is applied in the field of repairing the fire eye of a pre-baked aluminum electrolytic cell, can solve the problems of increasing the electrolyte carbon residue content and anode current density, reducing the quality grade of primary aluminum, increasing DC power consumption, etc., so as to prevent oxidation and slag removal. phenomenon, the effect of improving the quality and grade of primary aluminum and prolonging the service life
Inactive Publication Date: 2008-05-28
GUIZHOU BRANCH CHINA ALUMINUM IND
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Problems solved by technology
However, in the actual production process of aluminum smelting, the anode at the fire hole cannot be completely covered with materials, and some parts are exposed and oxidized to slag, which causes the anode steel claw to be rinsed by the liquid electrolyte in the aluminum electrolytic cell, which reduces the quality of the primary aluminum and increases the concentration of the electrolyte. Carbon slag content and anode current density reduce the anode life cycle, increase carbon consumption per ton of aluminum anode, reduce current efficiency, and increase DC power consumption
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment
[0010] First of all, a bottomless colander was made according to the requirements. The shape of the outer wall of the bottomless colander is consistent with the shape of the fire hole of the baked aluminum electrolytic cell. The bottomless colander is equipped with a handle for easy operation. The specific operation is as follows:
[0011] 1) Put the bottomless colander into the fire hole to be pasted to ensure that the aluminum electrolytic cell is normally shelled and unloaded, and it will not affect the paste fire hole operation.
[0012] 2) Take the liquid electrolyte and pour it between the bottomless colander and the exposed part of the anode of the fire hole, and quickly sprinkle the alumina powder with a shovel to let it solidify.
[0013] 3) Shake the handle of the bottomless colander after performing the second operation 3 or 4 times to let it solidify layer by layer.
[0014] 4) After the Huoyan anode is pasted, take out the bottomless colander.
[0015] According...
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The invention relates to a method of repairing a fire hole of pre-baked aluminum reduction cells. The invention is characterized in that the process of repairing is to place a passage of tapered strainer in the fire hole, pour the liquid electrolyte between the strainer without bottom and the naked part of the anode of the fire hole, then quickly spray aluminum oxide bulk material on the liquid electrolyte and take out the strainer without bottom after the anode of the fire hole is consolidated and pasted. Employing the method of the invention, the anode is completely coated by the consolidated liquid electrolyte and the aluminum oxide, which prevents the occurrence of oxidation and dreg losing, the period of use of the anode is extended, the carbon consumption per ton aluminum is reduced, the rinsing of steel claw caused by the oxidation of the anode is avoided, and the quality grade of the original aluminum is improved.
Description
technical field [0001] The invention relates to a method for repairing a fire hole in a prebaked aluminum electrolytic cell. Background technique [0002] During the aluminum smelting process of the aluminum electrolytic cell, according to the technical requirements of the normal production process, several fire holes should be left between the two rows of anode groups in the prebaked aluminum electrolytic cell to keep them clear, so that the aluminum oxide, the raw material for aluminum smelting, can smoothly enter the cell for melting, and at the same time The anode should also be covered and protected with insulating material to prevent oxidation. However, in the actual production process of aluminum smelting, the anode at the fire hole cannot be completely covered with materials, and some parts are exposed and oxidized to slag, which causes the anode steel claw to be rinsed by the liquid electrolyte in the aluminum electrolytic cell, which reduces the quality of the prim...
Claims
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Inventor 张建华李希明王会全代启安荆文军
Owner GUIZHOU BRANCH CHINA ALUMINUM IND