Abstract
Due to differences in the surface physical and chemical properties of the carbon and ash, particles of unburned carbon and fly ash can be electrically charged to opposite polarity, and can be separated by passing them through an external electric field. A laboratory scale triboelectrostatic separation system was used to study fly ash beneficiation. Fly ash samples, characterized by size analysis and carbon content, were subjected to triboelectrostatic separation. The separated fractions were collected and evaluated for carbon content, and subjected to SEM. The results indicate the potential for applying dry separation technology for removing unburned carbon from coal ash.
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