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Estimation of the Bond's grindability from sink-float test data for two different pumices
(Grup Matbaacilik, 2009) Deniz, Vedat; Umucu, Yakup; Çayirli, Serkan
In this study, a method for calculating the Bond's grindability by the sink-float test data of pumice was studied. Primarily, the cumulative weight and porosity content of the floating fraction have been determined for two different pumice samples in all relative densities tested. Then, grindability of the pumice samples is determined for its constituent specific gravity fractions. Though the grindability of the constituent specific gravity fractions of both the pumices varies in a systematic manner, certain differences, however, can be observed in the variation pattern between the two pumices which are easy washability and moderate difficult washability characteristic pumices. The relationships between the Bond's grindability and relative densities and between the Bond's grindability and porosity have been stated as simple equations and the calculated values from equations have been compared with the experimental results. Finally, the float-sink test results can be stated by simple equations relating to the Bond's grindability value. The Bond grindability (Gb) is easily measured by carrying out sink-float separation, and by measuring the constituent relative density fractions and porosity content.