Quantitative control method for carbon anode replacement in aluminum electrolysis process

Abstract

The invention discloses a quantitative control method for carbon anode replacement in the aluminum electrolysis process. The quantitative control method for carbon anode replacement in the aluminum electrolysis process comprises the following steps that a, zero position point (8) and a reference point (9) are sequentially arranged from top to bottom above a molten aluminum level (7); b, the heighth1 of upward movement of a used carbon anode A (4) to the zero position point (8) is recorded; c, the height h2 of descent of the bottom face of the carbon anode A (4) to the position flush with thereference point (9) is recorded; d, the height difference delta s between the reference point (9) and the molten aluminum level (7) is calculated, and delta s=h1-h2; e, a replacing new carbon anode B(5) is lifted to the zero position point (8); f, the descent height h3 of the bottom face of the carbon anode B (5) to the position flush with the reference point (9) is recorded; g, the total descent height H of the carbon anode B (5) is calculated, and the total descent height H=h3+delta s+ delta h, wherein delta h is the design height, existing when the carbon anode sinks below the molten aluminum level (7), of the carbon anode. The quantitative control method for carbon anode replacement in the aluminum electrolysis process has the features that the accuracy is high, the structure is simple, operation is easy, the carbon anode replacement convenience is high, the replacement efficiency is high, and the safety is good.

Description

technical field [0001] The present invention is in the technical field of electrolytic aluminum, in particular to a quantitative control method for carbon anode replacement in the process of electrolytic aluminum. Background technique [0002] Usually, the subsidence depth of the carbon anode of electrolytic aluminum after replacement is done manually with a measuring tool, but there will be a large error in manual action, so that the depth of the subsidence of the carbon anode is uncertain. If the sedimentation depth error of the carbon anode is too large, it will cause incomplete electrolysis or excessive electrolysis. The process will generate a large amount of CO, low electrolysis efficiency, and waste of resources and energy. In addition, the carbon anode cannot maintain the consistency of each piece during pouring, which also increases the difficulty of the quantitative control of the sedimentation depth of the carbon anode. Moreover, a series of safety issues may ar...

AI Technical Summary

Problems solved by technology

[0002] Usually, the subsidence depth of the carbon anode of electrolytic aluminum after replacement is completed by manual hand-held measuring tools, but there will be large errors during manual operation, making the subsidence depth of the carbon anode uncertain

If the settlement depth error of the carbon anode is too large, it will cause incomplete electrolysis or excessive electrolysis

The process will produce a large amount of CO and the electrolysis efficiency is too low, resource consumption and energy waste

In addition, the carbon anode cannot maintain the consistency of each piece during pouring, which also increases the difficulty of the accuracy of the quantitative control of the carbon anode's settlement depth

Moreover, there may be a series of safety problems in manual measurement

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