, Volume 284, Issue 1, pp 112-116
Date: 11 Aug 2005

Modification of flow properties of concentrated lignite dispersions

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Abstract

Concentrated water-based lignite suspensions (pastes) possess unpleasant flow behaviour. Under extrusion-like conditions suspension is rapidly compacted, viscosity rises considerably and flow effectively ceases. Using diluted aqueous solution of carboxymethylcellulose sodium salt as a dispersion medium eliminates this adverse phenomenon and keeps liquid-like flowing of suspension. Moreover, effective dilatant suspension behaviour is transformed to pseudoplastic.