Enrichment of coal macerals using froth flotation

Coal macerals differ widely iir their surface properties and in their hyrop hobicities. Therefore, it is necessary to study the flotation time dependen ce of coal macerals using varying concentrations of various frothers and co llectors. In the present study, froth flotation is used to explore the poss ibility of segregating coal macerals based on their relative rates of flota tion. Petrographic analysis of the various macerals in the concentrate were carried out, and the results are expressed bl terms of the recoveries of v arious maceral groups and mineral matter. Results show that it is possible to recover a good volume of the reactive minerals without much loss of calo rific value.