Effect of grinding on the flotation of oxidized coal
Abstract：FTIR was used to indicate whether the grinding can improve the floatability of the two different oxidized coals.The results of FTIR show that the grinding processes can reduce the contents of hydrophilic groups(carboxyl and hydroxyl) and increase the content of hydrophobic groups(benzene rings and methyl).The coal oxidized mildly can be floated efficiently after 20-30 min grinding.The coal heavily oxidized can also be floated efficiently after 80 min grinding.But the flotation recovery of heavy oxidized coal drops down while the grinding time is more than 80 min.The best flotation recovery of heavy oxidized coal occurs while the yield of size fraction 62-11 μm is the highest.
Keywords：grindingoxidized coalflotationFTIRparticle size
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：5( 2087-2091 )