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Prebaked Anode

2025-05-27

Prebaked Anode is a kind of carbon anode material used for aluminum electrolysis production, it is made of carbon block by high temperature roasting, with high conductivity, high temperature resistance, low resistance and low ash and other characteristics. In an aluminum electrolytic cell, the prebaked anode acts as a conductive electrode and reacts with the electrolyte and electrolytic aluminum to provide current conduction and participate in the oxidation reaction.

 

Production process of prebaked anode: 1.Raw material mixing: high quality petroleum coke and coal tar pitch as the main raw materials, through the ratio mixing. 2.Molding: The mixed material is pressed or extruded to form a certain specification of carbon block. 3.Roasting: Roasting in a high temperature furnace at 1200 ° C ~ 1400 ° C to densify the carbon block structure and improve electrical conductivity and durability. 4.Inspection and processing: After quality inspection, cutting, punching and other processing, to make anode blocks that meet the needs of electrolytic aluminum production

 

Features of prebaked anode:
1.Strong conductivity: low resistivity, improve electrolytic efficiency, reduce energy consumption.
2.High temperature resistance, oxidation resistance: stable operation in high temperature electrolytic environment, low loss rate.
3.Compact structure, corrosion resistance: reduce anode consumption, improve the service life of the electrolytic cell.
4.Low ash, low impurities: reduce the content of impurities in aluminum products, improve the purity of aluminum.

 

Main uses of pre-baked anode:
1.Electrolytic aluminum industry: Used in the Hall-Heroult electrolysis Process, as an anode material, and the electrolyte to release oxygen, to achieve the reduction of alumina into metal aluminum.
2.Carbon industry: as a raw material for electrodes, electrode pastes and other products.
3.Other uses: Some conductive materials used in metallurgy, chemical industry and other industries.

 

Item

GS-1

GS-3

GS-5

GS-10

Real Density

≥1.91 g/cm3

≥1.95g/cm3

≥1.99 g/cm3

≥2.08 g/cm3

Apparent Density

≥1.56 g/cm3

≥1.57 g/cm3

≥1.57g/cm3

≥1.59 g/cm3

Resistivity

≤39 uΩ.m

≤35 uΩ.m

≤30 uΩ.m

≤21 uΩ.m

Compressive Strength

≥32 Mpa

≥24 Mpa

≥24 Mpa

≥26 Mpa

Ash

≤8%

≤5%

≤4%

≤2%

Flexural Strength

≤10.0 MPa

≤7.0 MPa

≤7.0 MPa

≤7.5 MPa

Young's Modulus

≤10.0 GPa

≤7.0 GPa

≤7.0 GPa

≤6.5 GPa

CTE(300ºC)

≤4.2

≤4.0

≤4.0

≤4.0

Sodium Expansion Rate

≤1.0%

≤0.8%

≤0.7%

≤0.5%

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