The New Jersey Institute of Technology's
Electronic Theses & Dissertations Project

Title:	Ball milling of non-Newtonian dispersions
Author:	Miller, Barry S.
View Online:	njit-etd1967-005 (vi, [78] pages ~ 3.1 MB pdf)
Department:	Department of Chemical Engineering
Degree:	Master of Science
Program:	Chemical Engineering
Document Type:	Thesis
Advisory Committee:	Salamone, Jerome J. (Committee chair) McCormick, John E. (Committee member) Hanesian, Deran (Committee member)
Date:	1967
Keywords:	Grinding machines. Non-Newtonian fluids.
Availability:	Unrestricted
Abstract:	This investigation attempts to obtain a better understanding of flow behavior of a pigmented dispersion in a ball mill. A power-law fluid model was used to approximate the rheological behavior of the milled fluid. To correlate power data on each of 276 milled dispersions, this model was used together with power number, Reynolds number, Froude number; and some geometrical variables. Laboratory size stainless steel jars containing stainless steel balls from 1/8 to 3/4 inches in diameter were used to Mill a pigment/binder/solvent system at various speeds for different periods of time. A correlation of power number as a function of a modified Reynaldo number, Froude number and mill diameter-to-ball diameter ratio was found.