Improved Coal Flotation with Sinterol Modifier

Abstract

The flotation of coal with different ash content when using Sinterol modifier is studied. If the modifier consumption is 1.0–3.0 g/t of coal fines, the extraction of the coal’s combustible mass in the concentrate is increased; the selectivity of the process is increased; and the loss of the coal’s organic mass with the flotation wastes is decreased. The improved flotation may be explained as follows. The Sinterol modifier is adsorbed on active sections of the coal surface by means of hydrogen bonds with its polar groups, in a configuration such that the hydrocarbon groups face the water. That results in a more hydrophobic surface of the coal particles and improves their floatability. The modifier is more effective in flotation when supplied before the collection agent.