Publication Details

Halford, W. G., Kennedy, O. & Arnold, P. C. (2009). Controlling Downstream Particle Segregation with a Twisted Standpipe. 6th International Conference for Conveying and Handling of Particulate Solids (pp. 677-682).


Natural segregation of particles often needs to be controlled directing the bulk solids into downstream processes. Such control is especially a requirement when the downstream flow is to be split into separate streams and/or evenly spread across processing equipment.

This paper reports on a model study where segregation was controlled by employing a square standpipe with a helical twist down the axis of the standpipe. A summary of the outcomes is provided where it was shown that it is possible to control the flow of a bulk solid down a vertical choked flow standpipe by inducing a helical twist in the standpipe and hence providing a positive influence on the downstream segregation issues.

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