Short communication Polymer

Colloid and Polymer Science

, Volume 284, Issue 1, pp 112-116

Modification of flow properties of concentrated lignite dispersions

  • Miloslav PekařAffiliated withFaculty of Chemistry, Institute of Physical and Applied Chemistry, Brno University of Technology Email author 
  • , Pavla DivišováAffiliated withFaculty of Chemistry, Institute of Physical and Applied Chemistry, Brno University of Technology
  • , Michal KlimovičAffiliated withFaculty of Chemistry, Institute of Physical and Applied Chemistry, Brno University of Technology

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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.

Keywords

Carboxymethylcellulose Lignite paste Rheological additive Suspension