Prilling of aluminum sulfate hydrates

A prilling technique was used to produce droplets of aluminum sulfate hydra tes in the size range of 2-2.5 mm. Production of spherical particles of alu minum sulfate hydrates by using a prilling technique has never been studied , nor carried out. The effects of the orifice geometry and hydrostatic head on drop formation were measured. The flow rates of hydrated aluminum sulfa te melt through bores of 0.08 and 0.11 cm were measured for liquid heads of 10-100 cm. It was found that the break-up of a liquid jet produced particl es in the size range 2.0-2.5 mm with a 0.8 mm orifice. The modified Meister and Scheele correlation, which is the first application on a high viscous fluid in air system, was found to be satisfactory for estimating the partic le size obtained by the jet break-up mechanism. (C) 2000 Society of Chemica l Industry.