Patent ID: 8074804
Filing Date: 2011-12-13
Classification: C04B,Y02W

Abstract:
1. A method for increasing the amount of cenospheres in a fly ash sample, the method comprising: (a) providing an amount of fly ash having an initial percentage of cenospheres; (b) separating the amount of fly ash into a first fraction of fly ash having particle sizes greater than a predetermined particle size and a second fraction of fly ash having particle sizes less than or equal to the predetermined particle size; and (c) separating the first fraction of fly ash or the second fraction of fly ash into a third fraction of fly ash having particle densities greater than a predetermined particle density and a fourth fraction of fly ash having particle densities less than or equal to the predetermined particle density such that the fourth fraction of fly ash has a percentage of cenospheres greater than the initial percentage, wherein the initial percentage of cenospheres and the percentage of cenospheres in the fourth fraction of fly ash are volume percentages or weight percentages and at least some of the cenospheres in the fourth fraction of fly ash have a density greater than 1 g/cc.