The Andrews-Mika Model

The figure above represents the internal structure of the Andrews-Mika diagram for a single particle, represented by a spike in the back of the diagram, as indicated by the large red arrow. The grade of the parent particle is about 40% valuable. When it breaks, it can only generate progeny in sizes smaller than its own size. The progeny grades are bounded by what is called the accessible region of the Andrews-Mika diagram. Areas outside of the accessible region, as indicated by the blue arrows, will contain no progeny particles. Notice how liberated particles start appearing at sizes much below the parent particle size. This is a function of the texture of the parent particle. For fine intrincated texrtures, the liberation sizes will be further away from the parent particle size, and for coarse, simple textures, the liberation sizes will be closer to the parent particle size. The relative positions of the liberation sizes is regulated by the parameter phiA in the Ljubljana model.