Fine-coal cleaning is studied using dry, triboelectrostatic experimentation. The 45–75 μn coals are pneumatically transported through a Cu-loop tribocharger and then transported through a 100–200 kV/m electric field. Positively charged coal is deflected to the negative electrode and negatively charged minerals are deflected to the positive electrode. Samples are retrieved and subjected to petrographic analysis. Petrographic analysis of these samples showed that for high volatile A and B bituminous coals, vitrinite macerals are significantly enhanced in the clean coal, whereas the fusinite + semifusinite + exinite maceral are enhanced in the tailings/minerals. For a high volatile C bituminous coal, this trend in enhancement is not observed. The vitrinite partitioning, greater for dry processing than for wet processing, may be related to differences in surface chemical and physical properties of the coals.
|Number of pages||4|
|Journal||Coal Science and Technology|
|State||Published - Jan 1 1995|
ASJC Scopus subject areas
- Energy (all)