Novel energy-saving aluminum cell with chamfering grooving cathode

Abstract

The invention relates to a novel energy-saving aluminum electrolytic cell with a chamfered grooved cathode. The aluminum electrolytic cell is characterized in that: a cathode carbon block adopted by the electrolytic cell is a chamfered and grooved novel carbon block; the upper part of the cross section of the carbon block is a trapezoid; the upper surface of the middle part of the longitudinal section of the carbon block is provided with a through rectangular tank; and the whole surface of the cathode on the bottom of the electrolytic cell is in the form of a plurality of dovetail grooves orthogonal with a rectangular groove. The novel energy-saving electrolytic cell can not only bring about evener current density distribution of an aluminum liquid, the cathode carbon block and a steel rod, but also improve the even distribution of a magnetic field, reduces the stress produced by the magnetic action on the aluminum liquid, effectively reduces the flow velocity of the aluminum liquid, changes the flow state of the aluminum liquid, changes the turbulent flow into the laminar flow, reduces the fluctuation of an electrolyte and the aluminum liquid in the cell, and consequently reduces the polar pitch and the pressure fall in the cell and realizes energy conservation and consumption reduction of electrolyzation.

Description

technical field [0001] The invention belongs to the technical field of electrolytic aluminum, and in particular relates to a novel energy-saving aluminum electrolytic cell with chamfered and slotted cathodes. Background technique [0002] At present, the DC power consumption per ton of aluminum in the international large-scale prebaked tank has dropped to about 13,000Kwh, but it is far from the theoretical power consumption, and the energy utilization rate is still less than 50%. Constantly exploring and adopting new technologies to achieve energy saving and consumption reduction is not only conducive to saving energy and reducing pollution, but also reduces production costs of enterprises and improves the market competitiveness of enterprises. Therefore, saving energy and reducing consumption is still the main direction of modern aluminum companies. [0003] Increasing the current efficiency to over 96% and reducing the DC power consumption to below 12800Kwh / t-A1 have beco...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the currently used cryolite-alumina molten salt electrolysis method to produce metal aluminum electrolytic cells, the horizontal current of the aluminum liquid is generally large, and the current distribution of the cathode carbon block and the cathode steel rod is uneven, so that the aluminum liquid produced fluctuates too much and the pole distance Unable to continue to reduce, the cell voltage is much higher than the theoretical voltage, local overheating of the cathode carbon block, early damage to the electrolytic cell, etc.

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