ABSTRACT

Flotation of low-rank-oxidized coals is a challenging task for the recovery of carbonaceous material using conventional collectors. The presence of polar hydroxyl, carbonyl, phenols, and other oxygenated functional groups on the surface of such colas influence the hydrophobicity of coals. The present paper summarizes the results of in-depth studies on the analysis of the flotation response of low-volatile-medium coking coal using two types of collectors viz., the conventional Diesel oil and a biodegradable Mahua oil. The performance and response of the flotation to these two reagents have been analyzed through kinetic studies. Further, the presence of oxygenated functional groups and fatty acids in the biodegradable collector markedly enhances the flotation of low-rank-oxidized coals (also called LVMC coal) are compared with the conventional collector diesel oil. The paper recommends that, since biodegradable oil is a natural, renewable, environmentally friendly, nontoxic oil, which has no chemical additives or harmful chemicals, it can be used as an alternative collector for the flotation of low-rank-oxidized coals.

摘要

低级氧化煤的浮选是使用传统捕收剂回收含碳材料的一项具有挑战性的任务。此类可乐表面存在的极性羟基、羰基、酚类和其他含氧官能团会影响煤的疏水性。本文总结了使用两种类型的捕收剂（即常规柴油和可生物降解的麻花油）对低挥发性介质焦煤的浮选响应分析进行深入研究的结果。已经通过动力学研究分析了浮选对这两种试剂的性能和响应。更远，与传统捕收剂柴油相比，可生物降解捕收剂中含氧官能团和脂肪酸的存在显着增强了低阶氧化煤（也称为 LVMC 煤）的浮选性。论文建议，生物降解油是一种天然、可再生、环保、无毒的油品，不含任何化学添加剂和有害化学物质，可作为低阶氧化煤浮选的替代捕收剂。