Measurement of shear rates in a laboratory tumbling mill

被引：17

作者：

Govender, I. ^{[1
,2
,3
]}

Mangesana, N. ^{[2
,3
]}

Mainza, A. N. ^{[2
,3
]}

Franzidis, J. -P. ^{[2
,3
]}

机构：

[1] Univ Cape Town, Dept Phys, ZA-7701 Cape Town, Western Cape, South Africa

[2] Univ Cape Town, Dept Chem Engn, Ctr Minerals Res, ZA-7701 Cape Town, Western Cape, South Africa

[3] Univ Cape Town, Dept Chem Engn, Minerals Met Initiat, ZA-7701 Cape Town, Western Cape, South Africa

来源：

MINERALS ENGINEERING | 2011年 / 24卷 / 3-4期

关键词：

Shear rate; PEPT; Viscosity; SEGREGATION; TRACKING; FLOWS;

D O I：

10.1016/j.mineng.2010.08.009

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

A methodology for characterising shear rate profiles in tumbling mills based on in situ trajectory fields from Positron Emission Particle Tracking (PEPT) experiments is presented. Experiments were carried Out in a laboratory scale mill fitted with lifter bars, pulp lifters and a discharge grate, and run with radioactively labelled particles within re-circulating slurry environments. Using time-averaged velocity distributions of small PEPT tracers, a model for tangential velocity profiles along radial scan-lines is proposed from which the shear rates are derived. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：225 / 229

页数：5

共 19 条

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