电化学处理对神木煤显微组分表面结构及可浮性的影响研究

为建立煤岩显微组分的电化学浮选分离方法,以铝为电极,考察了阳极和阴极电化学处理对神木煤镜质组和惰质组表面结构及表面电位和润湿性的影响规律。结果表明,电化学处理对煤岩显微组分表面-OH、-COOH等含氧官能团影响显著;阳极处理使显微组分表面zeta电位向负电方向偏移,且润湿性增加,阴极处理则使其向正电方向偏移,润湿性减小;阳极处理后镜质组接触角的变化趋势更为显著,而阴极处理对于惰质组的影响更为明显。

Influence of electrochemical treatment on surface structure and flotability of Shenmu coal macerals

The effect of the electrochemical treatment on the surface structure and flotability of the macerals in Shenmu coal was studied, which aimed to provide a theoretical foundation for the separation by electrochemical flotation. The influence of anode and cathode on the surface structure, surface potential and wettability of Shenmu vitrinite and inertinite was investigated. The results show that the electrochemical treatment has a significant effect on the oxygen-containing functional groups of coal macerals such as -OH, -COOH, etc. The surface zeta potential of macerals moves towards the electronegativity and the wettability of macerals increases when the treatment is conducted with electrochemical anode. However, the surface zeta potential of macerals moves towards the electropositivity and the wettability decreases when the electrochemical cathode is used. The variation trend of contact angle for the vitrinite treated with electrochemical anode is more obvious, while the inertinite treated with electrochemical cathode is more conspicuous.