Surface-Chemical Studies on Graphite Suspensions using Inorganic Disperants

Singh, Yashvant and Deshpande, R J and Subramaniun, S (2006) Surface-Chemical Studies on Graphite Suspensions using Inorganic Disperants. In: Proceedings of the International Seminar on Mineral Processing Technology and Indo-Korean Workshop on Resource Recycling (MPT-2006), March 8-10, 2006, NML, Chennai.



Electrokinetic and dispersion characteristics of graphite suspensions were studied in the absence and presence of varying concentrations of different inorganic dispersants, namely sodium silicate, sodium hexametaphosphate and sodium tripolyphosphate. The isoelectric point of graphite was found to be located at pH 2.3. From the zeta potential data obtained as a function of pH in the presence of varying concentrations of the dispersants, it was observed that the phosphate based inorganic dispersants were more efficient in enhancing the electronegative character of zeta potential. Thus, better stability of the graphite suspension could be obtained using the phosphate based dispersants. The results of the dispersion tests corrobo-rated the zeta potential data. The electron microscopic studies indicated that the graphite particles obtained from the supernatant were finer than those in the settled portion.

Item Type:Conference or Workshop Item (Paper)
Official URL/DOI:
Uncontrolled Keywords:graphite; zeta potential; dispersion tests
Divisions:Mineral Processing
ID Code:6241
Deposited By:Sahu A K
Deposited On:03 Dec 2012 18:12
Last Modified:03 Dec 2012 18:12
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