Partitioning and behavior of coal macerais during dry coal cleaning

J. M. Stencel, H. Ban, J. L. Schaefer, J. C. Hower

Research output: Contribution to journalArticlepeer-review


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.

Original languageEnglish
Pages (from-to)1549-1552
Number of pages4
JournalCoal Science and Technology
Issue numberC
StatePublished - Jan 1 1995

ASJC Scopus subject areas

  • Energy (all)


Dive into the research topics of 'Partitioning and behavior of coal macerais during dry coal cleaning'. Together they form a unique fingerprint.

Cite this