Practical 1 Ball Milling TF Lab 1· Title Ball Milling Sieve The sieving process in this experiment uses a stack of sieves which have the smallest mesh above a collector tray followed by meshes which get progressively coarser towards the top of the stack Objective To grind the coarse salt to a smaller size by using a ball mill and to obtain the particle size distribution of the initial and the sieved final mixture