Low-temperature oxidation process of anthracite particle surface
Abstract：Surface property of coal is one of important factors determining coal flotability. The Quanta 250 （FED environmental scanning electron microscope and Bruker QUANTAX400-10 electric refrigeration spectrometer were used to analyze SEM surface distribution of coal with different oxidation time. The results show that with the increasing of oxidation time, the number of hole on the surface of coal increases and the crack appears along the holes, the ash elements （Si, A1） contents on the surface of the coal inerease. The average gray scale values analysis shows that the decreasing trend of carbon content and oxygen content becomes slow. The Zeta potential of coal is negative and decreases gradually with the oxidation time increasing. The decreasing trend of the Zeta potential also becomes slow. As oxidation time increases, the average gray values and Zeta potential on the surface of coal particles have the similar variation.
Keywords：pure eoaloxidationsurface propertiesgray valuesSEM surface distribution
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 578-581 )