Capture performance and quantum chemistry simulation of composite collectors for coal gasification coarse slag

Abstract

ABSTRACT For the purpose of using coal gasification coarse slag, carbon/ash separation by flotation is necessary. In this work, kerosene and dodecylamine polyoxyethylene ether (AC1202) were combined to create a composite collector known as AK, which was used in flotation experiments. The findings reveal that when the dosage of the AK collector was raised to 14 kg/t, the tailings ash reached as high as 83.76% and the combustible recovery increased by 69.84% to 81.42%, which is almost 28.62% higher than that of kerosene. The characteristics of various collectors, the strength of the adsorption between various collectors and particles, and the variation in particle hydrophobicity after the action of various collectors are used to elucidate the mechanism of the improved flotation effect with composite collectors. A new technique for separating the carbon and ash from coal gasification coarse slag is provided by the use of the AK collector.