Grinding Method for Increasing Specific Surface Area of Fluidized Bed Fly Ash

In this study, fly ash of a fluidized bed boiler produced in a power plant was stabilized by hydration and carbonation reaction.Then, each raw material was pulverized by two kinds of grinding equipment (Planetary mills and pot mills); the degree of grinding and the agglomeration behavior were observed.It was found that there were changes of specific surface area and particle size distribution according to grinding time.The surface of the raw material was observed using an optical microscope.As a result, agglomerates of about 75 µm or more due to electrostatic phenomenon were formed as the grinding time became longer; it was confirmed that the crushing efficiency slightly increased with use of antistatic agent.