Pressure drop prediction in hydraulic transport of bi-dispersed particles of coal and copper ore in pipeline

Authors

  • Kartik Chandra Ghanta,

    Corresponding author
    1. Department of Chemical Engineering, I. I. T., Kharagpur, West Bengal-721 302, India
    Current affiliation:
    1. Department of Petrochemical Engineering, Dr. B. A. T. University, Lonere, Dist.-Raigad, Maharashtra-402 103, India
    • Department of Chemical Engineering, I. I. T., Kharagpur, West Bengal-721 302, India
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  • N. K. Purohit

    1. Department of Chemical Engineering, I. I. T., Kharagpur, West Bengal-721 302, India
    Current affiliation:
    1. Department of Petrochemical Engineering, Dr. B. A. T. University, Lonere, Dist.-Raigad, Maharashtra-402 103, India
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Abstract

Hydraulic transport studies with coal and copper ore have been carried out in a 0.0254 m and a 0.019 m diameter pipeline to observe the effect of solids concentration, surface characteristics and particle size distribution on pressure drop. The coarse coal showed a lower pressure drop than the fines at any velocity of suspension, whereas copper ore, exhibited the opposite trend. It has been observed, that the pressure drop for hydraulic transportation of bi-dispersed particles is a minimum at certain weight proportions of coarse to fines, as compared to that for the transportation of either of the single size.

Based on the experimental results, an empirical expression was developed for the prediction of pressure gradient.

Abstract

Des études de transport hydraulique du charbon et du minerai de cuivre ont été, menées dans des conduites de 0,0254 m et 0,019 m afin d'observer l'effet de la concentration de solides, des caractéristiques de surface et de la distribution de taille des particules sur la perte de charge. Le chabon grossier montre une plus faible perte de charge que les fines à n'import quelle vitesse de suspension, tandis que le minerai de cuivre montre la tendance inverse. On a observé que la perte de charge pour le transport hydraulique de particules bidispersées présente un minimum pour certaines proportions particules grossières sur fines, comparativement à la perte de charge pour le transport soit de particules grossières, soit de fines.

à partir des résultats expérimentaux, une expression empirique a été établie pour le prédiction du gradient de pression.

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