Column Flotation of Coal With Fluorosurfactant Collectors.
Raleigh CE Jr.; Rice DA; Lai RW
SME Preprint 90-111 1990 :9 pages
In a cooperative agreement between the Bureau of Mines and the U.S. Department of Energy, laboratory column flotation tests were conducted to evaluate fluoro-surfactants as selective fine-coal flotation collectors. A Middle Kittanning seam coal responded to flotation with both anionic and nonionic fluorosurfactants. These fluorosurfactants were no more selective than mibc alone. However, for increasing coal yields, nonionic fluorosurfactant systems did not increase total sulfur and ash contents as sharply as mibc systems. Flotation selectivity also improved slightly when a combined anionic fluorosurfactant-mibc system was used in acidic pulps (ph <3.6). While the fluorosurfactants examined will not likely have direct application in current coal flotation practice, other fluorosurfactant systems could eventually prove beneficial for floating fine coals.
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