Abstract
The influence of foaming agents of different chemical group compositions and molecular structures, reagent consumption, and the density of the initial feed on the flotation performance of highly mineralized coals intended for coking has been examined. High efficiency and selectivity of the flotation process were established when using "DK-80" as a foaming agent, an individual compound with the main substance being dimethyl ethynyl carbinol (DMEC). Acetylenic alcohols have the ability to combine the properties of both a foaming agent and a collector, which significantly reduces the consumption of the collector reagent, increases the recovery of combustible mass into the concentrate, and improves its quality. It was found that a foaming agent consumption of 0.1 kg/t at an initial feed density of 140 g/l allows for high results in flotation enrichment and reduces flotation process costs by minimizing reagent consumption.
Keywords:
coal flotation, foaming agents, collector reagents, efficiency, recovery of combustible mass