| Abstract:Using quartz powder and white mud of paper mill as raw material, large aspect ratio of acicular wollastionite was synthesized by high temperature solid-state reaction method. The influence of mass ratio of quartz powder and white mud of paper mill, synthesis temperature and holding time on phase composition, relative content of the product were studied, and the morphology and particle diameter of wollastionite which was synthesized under optimum conditions were characterized. The results showed that the relative content and crystallinity of wollastionite were high, the largest aspect ratio reached to 30 when mass ratio of quartz powder and white mud of paper mill was 0.66∶1, calcining temperature was 1120℃, and the holding time was 4 h. This research opens up a new way of effective utilization of white mud of paper mill. |
