H. Polat et S. Chander, INTERACTION BETWEEN PHYSICAL AND CHEMICAL-VARIABLES IN THE FLOTATION OF LOW-RANK COALS, Minerals & metallurgical processing, 15(1), 1998, pp. 41-47
Citations number
29
Categorie Soggetti
Metallurgy & Metallurigical Engineering","Mining & Mineral Processing
Relatively large amounts of hydrocarbons such as fuel oils are often n
eeded in the flotation of low rank coals. The amount of oil can be dec
reased considerably by using surfactants as promoters. The reagents th
at are good candidates as surfactants to promote hydrophobicity can al
so act as emulsifying and wetting agents. Because the physical and che
mical variables influence various subprocesses in different ways, thei
r influence on the performance parameters is complex. The results of l
aboratory tests are presented to show that the dual role of reagents c
an be judiciously exploited to increase both the recovery and grade of
the clean coal. The mode and order of reagent addition is critical in
enhancing their efficacy as flotation promoters. The results demonstr
ate the benefits of proper conditioning of the pulp prior to flotation
.