... world from 1988 3.use in oilfield, construction Itroduction1. application: fly ash cenospheres is used in the oil field cementing, to reduce ... or white 4. advantages: light weight, nontoxic, tasteless,corrosion resistant, high temperature, pressure, insulation, small thermal conductivity, excellent performance. Physical Analysis ... .9%Refractoriness1550-1750c K2O 0.5-1.1% white cenosphere fly ash