phosphate ball mill control system
phosphate ball mill control system. Phosphate rock of to bpl, or as high as is reasonably obtainable, is finely ground in a ball mill and then mixed with cooled recycled phosphoric acidgypsum slurry in a digestion tank figs and At this stage the only reaction which occurs is between acid and any carbonates present in the rock, and between phosphates and low concentrations of sulfuric acid