An ore body of spodumene (LIAI(SiO3)2, a common form of the critical metal lithium) is approximately 18% by mass spodumene with the rest quartz (for the purposes of the assignment assume only these two minerals present). Processing of this ore body involves a number of steps: A. Wet grinding to reduce the particle size from a P80 of 2.2 cm to the P80 of 90 m required for froth flotation. B. Froth flotation to separate the spodumene (valuable) from the quartz (gangue). C. The valuable spodumene is sent for further processing and on-selling. D. The gangue quartz is sent to a thickener for dewatering and recycling of the water.