Abstract
Size classification of ultrafine particles is one of the most difficult techniques in materials processing. We developed a novel ultrafine particle separation technique based on interfacial properties. In this work, rapid size classification of silica particles (100-300nm) from suspension was examined in various solution chemistry by column bed system packed with fibrous ferro-nickel slag (FS). Smaller particles were selectively attached to the FS, while larger ones had passed through the column bed as an effluent. Classification efficiency depended on pH and ionic strength. Optimum classification was attained at pH3.5 and 10mmol/dm3 KNO3. These results were explained by DLVO theory, suggesting that surface characteristics of both particle and collector medium virtually determined the separation efficiency. Furthermore, particle concentration and flow velocity had influence on classification efficiency. This method proved to be simple, rapid, and cost-effective for classifying ultrafine particles in aqueous media.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Journal of the Society of Powder Technology, Japan
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
