Test of mixed ester collectors for low-rank coal flotation
Ester collectors were selected,including methyl oleate(MeO),methyl laurate(MeL),and n-amyl benzoate(nAB),as components to compose composite collectors,and their flotation effects on long-flame coal in the Ordos region were investigated with coal slurry unit flotation experiments.Meanwhile,the molecular dynamics method was employed to explore the microcosmic interaction mechanisms between these ester collectors and long-flame coal.The results indicate that compared to traditional coal oil collectors,ester composite collectors significantly enhance the flotation efficiency of long-flame coal.Under the same collector dosage,the flotation performance of the ternary composite collector MeO/MeL/nAB is notably superior to that of the binary composite collectors MeO/nAB or MeO/MeL.Molecular dynamics simulation results demonstrate that compared to the binary composite collectors MeO/nAB or MeO/MeL,the interaction strength between the ternary composite collector MeO/MeL/nAB and the coal model is higher.
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