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An Atmospheric Pressure Plasma Setup to Investigate the Reactive Species Formation
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Ash and Slag Waste Processing in Self-Shielded Atmospheric DC Arc Discharge Plasma
Zhanar Bolatova1, Alexander Pak1, Kirill Larionov1
1School of Energy & Power Engineering, Tomsk Polytechnic University, 634050 Tomsk, Russia.
Materials (Basel, Switzerland)
|November 26, 2022
Summary
This study demonstrates efficient slag waste processing using direct current arc discharge in air, yielding silicon carbide micropowder. Subsequent spark plasma sintering produced hard silicon carbide ceramic samples.
Area of Science:
- Materials Science
- Plasma Physics
- Waste Management
Background:
- Slag waste presents environmental and disposal challenges.
- Traditional processing methods can be energy-intensive and complex.
- Plasma technology offers potential for novel material synthesis and waste valorization.
Purpose of the Study:
- To investigate the feasibility of processing slag waste using direct current arc discharge in ambient air.
- To synthesize valuable materials from coal slag.
- To fabricate dense ceramic samples from the synthesized micropowder.
Main Methods:
- Direct current arc discharge in ambient air for slag treatment.
- Graphite removal via combustion.
- Micropowder synthesis of silicon carbide and aluminum nitride.
- Spark plasma sintering for ceramic fabrication.
Main Results:
- Successful processing of coal slag without vacuum or gas equipment.
- Formation of silicon carbide and aluminum nitride micropowder after graphite removal.
- Fabrication of bulk silicon carbide ceramic samples.
- Achieved bulk ceramic hardness of approximately 10.4 GPa.
Conclusions:
- Direct current arc discharge in air is an energy-efficient method for slag waste processing.
- This approach enables the synthesis of valuable silicon carbide ceramics from waste materials.
- The fabricated silicon carbide ceramics exhibit promising mechanical properties for potential applications.
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