PDF Process Technology Silica Sand Into Microsilica and Nanosilica For ...
washed before being ball milled for a period of tim e. Then silica sand is separated, filtered, and ovendried. What is somewhat unique is that prior to being separated the sand is sedimented in a reactor. The next step is ball milling for the seco nd time to allow dispersion followed by sieving to obtain the nano size particles or nanosilica.