Preparation method of anti-alumina-electrolysis prebaked anode

Abstract

The invention relates to a preparation method of an anti-alumina-electrolysis prebaked anode, which comprises the following steps: carrying out high-temperature calcination on petroleum coke to obtaincalcined coke, and crushing, screening and grading the calcined coke; adding the obtained calcined coke aggregate and powder into a kneading pot according to a designed proportion, performing kneading and preheating, adding an additive and a binder coal pitch, continuing heating, and uniformly kneading the materials to obtain anode paste; putting the obtained anode paste into a vibration formingmachine for vibration forming; cooling an antioxidant prebaked anode green body, and then placing the antioxidant prebaked anode green body in a roasting furnace for roasting; and after roasting is finished, performing cooling and discharging to obtain an anti-alumina-electrolysis prebaked anode finished product. The preparation method of an anti-alumina-electrolysis prebaked anode has the beneficial effects that the method is used for preparing an anti-alumina-electrolysis prebaked anode, so that the air reaction resistance and the carbon dioxide reaction resistance of the prebaked anode areimproved, the oxidation resistance of the prebaked anode is improved, the carbon residue amount of the anode is reduced, and the service cycle of the anode is prolonged by 1-2 days.

Description

technical field [0001] The invention relates to aluminum electrolysis in nonferrous metallurgy, in particular to a method for prebaking anodes for anti-oxidation aluminum electrolysis. Background technique [0002] At present, the cryolite-alumina molten salt electrolysis method is the only method for industrial production of electrolytic aluminum. This method has mature technology and high production efficiency. The prebaked anode used in this method is used as the anode material, which is known as the "heart of the aluminum electrolytic cell". ", plays a vital role in the entire aluminum electrolysis production, one is as a conductor to introduce current into the electrolytic cell; the other is as an anode material to participate in the aluminum electrolysis reaction. With the development of large-scale aluminum electrolytic cells, the thermal impact of aluminum electrolytic production on prebaked anodes increases, and the occurrence of rapid anode consumption, large slag ...

AI Technical Summary

Problems solved by technology

With the development of large-scale aluminum electrolytic cells, the thermal impact of aluminum electrolytic production on prebaked anodes increases, and the occurrence of rapid anode consumption, large slag drop, fragmentation, and shedding is very easy to occur during production, which seriously affects aluminum electrolysis. The production parameters of the tank and the stability of the production operation

The occurrence of the above situation is mainly due to the poor performance of anti-air reaction and anti-carbon dioxide reaction performance of the prebaked anode. Therefore, there is an urgent need for a prebaked anode for anti-alumina electrolysis to solve these problems.

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