Preparation method of anti-alumina-electrolysis prebaked anode

A prebaked anode and anti-alumina technology, which is applied in the field of aluminum electrolysis, can solve the problems that affect the production parameters of aluminum electrolytic cells, the stability of production operation, poor anti-air reaction performance and anti-carbon dioxide reaction performance, and fast anode consumption, etc., to achieve Effects of reducing air permeability, improving anti-oxidation ability, and reducing the amount of carbon residue

Inactive Publication Date: 2020-06-19
JINING CARBON GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 productio

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  • Preparation method of anti-alumina-electrolysis prebaked anode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1, the preparation method of a prebaked anode for anti-alumina electrolysis described in this specific embodiment is characterized in that it includes the following steps: Step S1: after the petroleum coke is calcined at high temperature, the calcined coke obtained is Crushing, sieving and grading to obtain calcined coke aggregates and powders of various particle sizes; step S2: adding the calcined coke aggregates and powders obtained in step S1 into the kneading pot according to the designed ratio, kneading, preheating, and then adding additives, The binder coal tar pitch is continuously heated and kneaded evenly to obtain an anode paste; step S3: the anode paste obtained in step S2 is placed into a vibration molding machine for vibration molding to make an anti-oxidation prebaked anode green body; step S4: S3 After cooling down, the anti-oxidation prebaked anode green body is placed in a roasting furnace for roasting according to the designed heating curve; Ste...

Embodiment 2

[0029] Example 2, the preparation method of a prebaked anode for anti-alumina electrolysis described in this specific embodiment is characterized in that it includes the following steps: Step S1: after the petroleum coke is calcined at high temperature, the calcined coke obtained is Crushing, sieving and grading to obtain calcined coke aggregates and powders of various particle sizes; step S2: adding the calcined coke aggregates and powders obtained in step S1 into the kneading pot according to the designed ratio, kneading, preheating, and then adding additives, The binder coal tar pitch is continuously heated and kneaded evenly to obtain an anode paste; step S3: the anode paste obtained in step S2 is placed into a vibration molding machine for vibration molding to make an anti-oxidation prebaked anode green body; step S4: S3 After cooling down, the anti-oxidation prebaked anode green body is placed in a roasting furnace for roasting according to the designed heating curve; Ste...

Embodiment 3

[0037] Example 3, the preparation method of a prebaked anode for anti-alumina electrolysis described in this specific embodiment is characterized in that it includes the following steps: Step S1: after the petroleum coke is calcined at high temperature, the calcined coke obtained is Crushing, sieving and grading to obtain calcined coke aggregates and powders of various particle sizes; step S2: adding the calcined coke aggregates and powders obtained in step S1 into the kneading pot according to the designed ratio, kneading, preheating, and then adding additives, The binder coal tar pitch is continuously heated and kneaded evenly to obtain an anode paste; step S3: the anode paste obtained in step S2 is placed into a vibration molding machine for vibration molding to make an anti-oxidation prebaked anode green body; step S4: S3 After cooling down, the anti-oxidation prebaked anode green body is placed in a roasting furnace for roasting according to the designed heating curve; Ste...

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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 ...

Claims

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Application Information

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IPC IPC(8): C04B35/532C04B35/622C25C3/12
CPCC04B35/532C04B35/622C04B2235/425C04B2235/447C04B2235/6562C04B2235/6567C04B2235/9669C04B2235/9684C25C3/125
Inventor 吉延新魏新伟闫桂林于益如胡春燕
Owner JINING CARBON GRP CO LTD
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