Study of gas holdup and pressure characteristics in a column flotation cell using coal / Satish Chandra Shukla in Minerals engineering, Vol. 23 N° 8 (Juillet 2010)  

Public ISBD [article]  inMinerals engineering > Vol. 23 N° 8 (Juillet 2010) . - pp. 636–642 Titre : Study of gas holdup and pressure characteristics in a column flotation cell using coal Type de document : texte imprimé Auteurs : Satish Chandra Shukla, Auteur ; Gautam Kundu, Auteur ; Dibyendu Mukherjee, Auteur Année de publication : 2011 Article en page(s) : pp. 636–642 Note générale : Génie Minier Langues : Anglais (eng) Mots-clés : Coal Column flotation Froth Mineral processing Résumé : Present work has been carried out to observe the effect of process variables (gas flow rate, feed flow rate, solid concentration and frother concentration) on gas holdup and pressure characteristics in flotation column using coal. Gas holdup has been estimated using phase separation method while piezometers have been used to obtain column’s axial pressure profile. It was observed that gas holdup in collection zone was affected by both air as well as feed flow rates. Up to 6% change in gas holdup may occur when the feed flow rate changes from 1–2 cm/s. It was also observed that addition of coal decreased the gas holdup while addition of methyl isobutyl carbinol (MIBC) had opposite effect. Almost linear variation in columns axial pressure characteristics has been observed with gas flow rate. An empirical relationship between gas holdup in the flotation column with column’s axial pressure difference was developed. DEWEY : 622 ISSN : 0892-6875 En ligne : http://www.sciencedirect.com/science/article/pii/S0892687510000610 [article] Study of gas holdup and pressure characteristics in a column flotation cell using coal [texte imprimé] / Satish Chandra Shukla, Auteur ; Gautam Kundu, Auteur ; Dibyendu Mukherjee, Auteur . - 2011 . - pp. 636–642. Génie Minier Langues : Anglais (eng) in Minerals engineering > Vol. 23 N° 8 (Juillet 2010) . - pp. 636–642 Mots-clés : Coal Column flotation Froth Mineral processing Résumé : Present work has been carried out to observe the effect of process variables (gas flow rate, feed flow rate, solid concentration and frother concentration) on gas holdup and pressure characteristics in flotation column using coal. Gas holdup has been estimated using phase separation method while piezometers have been used to obtain column’s axial pressure profile. It was observed that gas holdup in collection zone was affected by both air as well as feed flow rates. Up to 6% change in gas holdup may occur when the feed flow rate changes from 1–2 cm/s. It was also observed that addition of coal decreased the gas holdup while addition of methyl isobutyl carbinol (MIBC) had opposite effect. Almost linear variation in columns axial pressure characteristics has been observed with gas flow rate. An empirical relationship between gas holdup in the flotation column with column’s axial pressure difference was developed. DEWEY : 622 ISSN : 0892-6875 En ligne : http://www.sciencedirect.com/science/article/pii/S0892687510000610

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