Analysis of models and factors of long flame coal flotation process by response surface methodology

Inthisstudy,thephysicochemicalcleaningofShendonglongflamecoalwasinvestigatedby flocculationflotationtoproduceultracleancoal.FlotationexperimentsweredesignedwithBoxBehnken Designwhichisaresponsesurfacemethod.Theseparateactionandinteractioneffectsofkerosenedosage(A),secondaryoctanoldosage(B),andagitationspeed(C)onashcontentandyieldoftheconcentratewereevaluatedintheflotationexperiments.Theresultsshowedthatthesignificanceofinfluencing factorsonashcontentfollowedtheorder:C>B>A,AB>AC>BC,thesignificanceofinfluencingfactorson yieldfollowed the order:B>A>C,AC>BC>AB.The optimal conditions were kerosene dosage of 1.55mL,secondaryoctanoldosageof335μLandagitationspeedof3690 r/minwith1.72% ash contentand45.03% yieldrespectivelyintheconcentrate.