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Effect of carbon anode production parameters on anode cracking
Salah Amrani1, Duygu Kocaefe1, Yasar Kocaefe1
1Alouette Research Chair On Carbon, Aluminium Research Centre (REGAL), UQAC/Aluminerie University of Québec at ChicoutimiUniversity of Québec, Chicoutimi, Québec G7H 2B1 Canada.
SN Applied Sciences
|February 1, 2021
Summary
This study investigated how anode production parameters affect crack formation in carbon anodes for aluminum production. Controlling parameters like raw materials and baking is key to reducing defects and improving anode quality.
Area of Science:
- Materials Science
- Chemical Engineering
- Electrometallurgy
Background:
- Carbon anodes are crucial for aluminum electrolysis, impacting production costs, energy consumption, and environmental emissions.
- Anode quality is defined by high density, low porosity/cracks, low electrical resistivity, and low reactivity.
- Cracks and pores increase anode electrical resistivity, necessitating an understanding of their formation during production.
Purpose of the Study:
- To investigate the influence of various anode production parameters on crack formation.
- To correlate anode properties (density, electrical resistivity, crack density) with production parameters.
- To identify methods to prevent crack formation for improved anode quality.
Main Methods:
- Fabrication of carbon anodes at the University of Quebec at Chicoutimi (UQAC) carbon laboratory.
- Characterization of anode properties: density, electrical resistivity, and surface crack density.
- Tomographic analysis for visualization and quantification of internal cracks.
Main Results:
- Anode properties, indicative of quality, were correlated with production parameters.
- Specific parameters influencing crack formation were identified.
- Internal and surface crack characteristics were quantified.
Conclusions:
- Understanding the formation of pores and cracks during anode production is vital for preventing defects.
- Optimizing anode production parameters can lead to improved anode quality, reducing costs and environmental impact.
- Further research can focus on precise control of parameters to minimize anode defects.
