Effect of Diesel Oil and Mixture of Alcohol-Glycol Ether on Colombian Ultrafine Coal Cleaning Using a Test-Rig Closed-Loop Flotation Column

A test-rig closed-loop flotation column was used to observe the effect of diesel oil (collector) and Flomin F-425 (frother) on mass yield ash content for two Colombian coals: Caypa (northern zone) Guachinte (southwestern zone). The coal samples less than 38 µm (-400 M) were processed in a collector concentration range 0,32 1,60 kg/ton coal, as well frother 10 50 ppm. response surface methodology experimental test runs. results showed that maximum obtained by 98,39% at 1,28 kg collector/ton 40 ppm concentration, whereas 94,71% 0,96 30 concentration. In general, tends increase (low removal) with increase; while decrease (high when increases high concentrations. It is worth highlighting 0,65% lowest value reported literature employing loop single stage, which considered be an ultra-clean physical cleaning process.