ANALYSIS OF WAYS TO INTENSIFY FLOCCULATION OF FINELY DISPERSED SLIME

Oleksii Shestopalov, Nataliia Ponomarova

Abstract


The object of research is the process of the slime cleaning of the coal preparation plant from suspended solids by flocculation. The process of flocculation is multifactorial and depends on the concentration of the solid phase in the slime, the dispersed composition, the salinity, the pH of the medium, the concentration and degree of dilution of the flocculant and many other factors that have not been adequately studied in the current literature. Based on previous studies, it was suggested that the flocculant was introduced into the slime in two portions in an amount of 40 % and 60 % of the total flow. The aim of research is an experimental check of the influence of methods of dispersing and introducing the first portion of the flocculant onto the efficiency of sedimentation of the slime on the real slime. For this, in the diluted slime with water in a ratio of 1:1, the first portion of the flocculant is introduced in two ways: after diluting the slime with water and into the water before mixing it with the slime. It is established that the preliminary dispersion of the flocculant in a large volume of water leads to a significant increase (above 80-85 %) in the sedimentation rate of the formed floccules, as well as their strength to mechanical action

Keywords


flocculation; polydisperse slime; dispersed composition; floccules strength; sedimentation rate; adsorption efficiency; sedimentation intensification

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References


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DOI: http://dx.doi.org/10.21303/2585-6847.2017.00521

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ISSN 2585-6847 (Online), ISSN 2585-6839 (Print)