Enhancement of Flotation Performance of Oxidized Coal by the Mixture of Laurylamine Dipropylene Diamine and Kerosene

Conventional hydrocarbon oil cannot adhere effectively to oxidized coal, resulting in a low yield of clean coal. In this study, high-speed homogenizer was used emulsify LDD (laurylamine dipropylene diamine) and kerosene, which enhanced the flotation efficiency The results showed an increase from 4.12% (only kerosene) 23.33% (emulsified oil). An contact angle indicated that mixture reagent can hydrophobicity coal particles, is attributed adsorption onto particle surface decrease droplet A lower tension allows it produce stable layer froth than generated by kerosene alone.