Grain-Size Analysis of Foundry Sand

Abstract

Problems regarding grain-size analysis of molding sand and corresponding data processing are considered. Usually, to determine distribution of the particles in size a sand sample is sifted through a stack of sieves thus dividing a set of sand grains into broad and irregular intervals. Hence, the calculated statistical characteristics of the sand can substantially deviate from the true values. A very important indicator of the sand quality is a form of grains which is currently determined indirectly. Therefore, the analysis of those samples requires a modern method of analysis, e.g., an optical method which is capable of providing reliable quantitative information on the particle size and shape of the molding sand.