Results 211 to 220 of about 16,464 (251)

Particle breakage kinetics in horizontal stirred mills

Minerals Engineering, 2005
Abstract The particle breakage kinetics, product size and size distribution, as well as grinding limit for quartz suspensions in a horizontal stirred mill are investigated. Results of grinding studies on quartz suspensions in a horizontal stirred mill confirm “first-order” particle breakage rates. A comparison of equation fits reveal that the product
J. Yue, B. Klein
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Study of the lithium cluster breakage kinetics in germanium

Technical Physics Letters, 2002
The lithium cluster breakage in germanium obeys an exponential kinetics with an activation energy for the particle detachment from cluster equal to 0.31±0.05 eV.
V. V. Svetukhin, P. A. Il’in
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Shear flocculation—kinetics of floc coalescence and breakage

International Journal of Mineral Processing, 2001
Abstract The flocculation of ultrafine (size The present study uses a lumped population balance model (PBM) to understand the effect of different parameters affecting the kinetics of floc coalescence and breakage processes in shear flocculation. Results show that the flocculation rate decreases with increase in shear rate and the breakage rate is ...
D.P. Patil, J.R.G. Andrews, P.H.T. Uhlherr   +2 more
exaly   +2 more sources

Determination of growth and breakage kinetics of l-threonine crystals

Journal of Crystal Growth, 2006
Abstract The crystal growth and breakage kinetics of l -threonine by evaporation crystallization were studied at the laboratory scale using a 1200 ml crystallizer with draft tube. Evaporation experiments were carried out at three different temperatures and three different stirrer speeds. Crystal breakage phenomena were demonstrated by image analysis
Ying Bao, Jinlong Zhang, Qiuxiang Yin, Jingkang Wang   +3 more
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The effect of damage on breakage kinetics

Powder Technology, 2004
Abstract Algorithms are developed for describing the batch grinding kinetics of particles with a distribution of strengths subjected to repeated impacts of a known specific impact energy (as in a hammer mill). It is shown that the critical number of (equal) impacts required to produce sufficient damage that the final impact will cause disintegrative ...
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Kinetics of floc breakage and aggregation in agitated liquid suspensions

Journal of Colloid and Interface Science, 1985
Abstract A complete population balance equation governing the floc size distribution interpreting both breakage and aggregation mechanisms was obtained in this work. The present work deals with floc formation and breakage in the presence of polymer coagulants.
C.F Lu, L.A Spielman
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Influence of process parameters on breakage kinetics and grinding limit at the nanoscale

AIChE Journal, 2010
AbstractIn long‐term milling experiments, in a stirred media mill, a grinding limit where no further particle breakage occurs was identified. During mechanical stressing of the particles, defects are generated in the crystalline lattice, which allows real fracture of nanoparticles.
Catharina Knieke, Stefan Romeis, Wolfgang Peukert   +2 more
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AGGLOMERATION, BREAKAGE, POPULATION BALANCE, AND CRYSTALLIZATION KINETICS OF REACTIVE PRECIPITATION PROCESS

Chemical Engineering Communications, 2006
ABSTRACT The agglomeration and breakage of particles play a significant role in determining final particle size distribution (PSD) and other qualities such as filtering characteristics and impurity content. In reactive precipitation processes, especially during the precipitation of fine particles, the agglomeration and breakage of particles normally ...
Jing-Kang Wang
exaly   +2 more sources

Modeling of the particle breakage kinetics in the wet mills for the paper industry

Powder Technology, 1999
Abstract To develop the physical properties of paper, it is necessary to prepare the cellulose fibres. This is done in wet mills or refiners. In these machines, the dilute fibre suspension is forced through a gap between two surfaces fitted with bars that move relatively to each other.
J.C. Roux, T.L. Mayade
exaly   +2 more sources

Kinetics of fluidised bed melt granulationIV. Selecting the breakage model

Powder Technology, 2004
The main purpose of this paper is to develop and verify a suitable breakage model to describe the breakage kinetics in fluidised bed melt granulation (FBMG), by means of population balance modelling. A two internal coordinate population balance equation (PBE) [AIChE J.
H TAN, A SALMAN, M HOUNSLOW
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