Exercise 7-2
Ore bodies are not homogeneous and variability in grade, texture and other properties is in fact the norm. The Taconite studied in this module has a texture characterized by the parameter phiA in the Ljubljana model. Taconite from different areas in the ore body may be different in texture. Consider the hypothetical cases below:
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In the images above, Chert is dull grey while Magnetite is bright. Note how the texture parameter is directly related to the complexity of texture, in the morphological sense. In the left particle, texture is so complex that grain size becomes a concept that is difficult to grasp. Interphase area per unit volume of phase is the quantitative property that applies in all cases, and this is how the parameter phiA is derived.
Run simulations using the values of phiA in the Table above. Compare grade and recovery of Magnetite for each case in the Cyclone Overflow stream. (You already completed the simulation for PhiA = 50 in the previous exercise.)