title: Visualization study on sedimentation of micron iron oxide particles.
abstract: In this paper, a novel technique combined light-electronic microscopy and computer imaging trace was used for visualization of the sedimentation of micron iron oxide particles in a customized micro-reactor. Micron iron oxide particles were recovered from the cinder of sulfuric acid production by sedimentation separating and hydraulic rating. Effects of particle size, shape and surface roughness on the sedimentation velocity were investigated. For irregular-shape particles, the sedimentation velocity and the geometric parameters of the particles were measured by the imaging trace technique. A correction coefficient (c) was used to modify the Stokes equation. In this study, the relationship between the correction coefficient and the equivalent diameter (d(p)) was found to be linear: c=0.6272-0.0298d(p), for iron oxide particles with equivalent diameter 4-22 microm.
authors.affiliation: Hubei Key Laboratory of Novel Reactor and Green Chemical Technology, School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology, Wuhan 430073, People's Republic of China.
authors.forename: Jin-Fang
authors.initials: JF
authors.lastname: Chen
authors.forename: Ye
authors.initials: Y
authors.lastname: Luo
authors.forename: Jun-Hui
authors.initials: JH
authors.lastname: Xu
authors.forename: Qi-Ming
authors.initials: QM
authors.lastname: Chen
authors.forename: Jia
authors.initials: J
authors.lastname: Guo