lt has been studied the batch sedimentation of aqueous suspensions of precipitated calcium carbonate, barium sulphate and lead oxide , in vertical thickeners of rectangular and circular cross sectional area. Suspensions vary in concentration between 19.4 and 617.9 g/I and the rate of sedimentation obtained between 0.008 and 7.70 cm/min. The effect of the specific gravity of the solid on the rate of sedimentation is the same for all the suspensions, that is, the greater the value of the specific gravity the greater the value of rate of sedimentation.

It has been experimentally determined refractive index of binary liquid mixtures toluene with n-pentane, n-hexane, n-heptane, cyclohexane and ethanol at ± 0.02 c 25.00 c. using precision refractometer Bausch & Lomb. The molar fraction of the more volatile component is determined with an accuracy of ± 0.0005 accuracy. The refractive index of each bit is set to polynomial equations by the method of least squares, based on the molar fraction of the more volatile component.

We have studied the batch sedimentation of aqueous suspensions of precipitated calcium carbonate, barium sulfate and lead oxide settlers inclined rectangular and circular cross section. The énguio tilt with respect to the horizontal between 35 ° and 75 °, to suspensions that vary in strength between 39.4 and 1070 g / l.Las obtained apparent sedimentation velocities ranging from 0.071 to 17.6 cm / min. the apparent sedimentation rate has been correlated using a modified version of the equation of Nakamura and Kuroda (1), see above.

lt has been studied the batch sedimentation of aqueous suspensions of precipitated calcium carbonate, barium sulphate and lead oxide , in vertical thickeners of rectangular and circular cross sectional area. Suspensions vary in concentration between 19.4 and 617.9 g/I and the rate of sedimentation obtained between 0.008 and 7.70 cm/min. The effect of the specific gravity of the solid on the rate of sedimentation is the same for all the suspensions, that is, the greater the value of the specific gravity the greater the value of rate of sedimentation.

It has been experimentally determined refractive index of binary liquid mixtures toluene with n-pentane, n-hexane, n-heptane, cyclohexane and ethanol at ± 0.02 c 25.00 c. using precision refractometer Bausch & Lomb. The molar fraction of the more volatile component is determined with an accuracy of ± 0.0005 accuracy. The refractive index of each bit is set to polynomial equations by the method of least squares, based on the molar fraction of the more volatile component.

Se ha estudiado la sedimentación discontinua de suspensiones acuosas de carbonato de calcio precipitado, de sulfato de barío, y de óxido de plomo en sedimentadores inclinados de sección transversal circular y rectangular. El énguio de inclinación, con respecto a la horizontal, fluctúa entre 35º y 75º, para suspensiones que varian en concentracíón entre 39.4 y 1070 g/l.Las velocidades aparentes de sedimentación obtenidas fluctúan entre 0,071 y 17,6 cm/min. la velocidad aparente de sedimentación se ha correlacionado usando una versión modificada de la ecuación de Nakamura y Kuroda (1), ver arriba.