### CASE STUDY - FINISH MILLING - The Cement Institute

Why do you think this is so? ii) Use the relationship to calculate the output (tonnes/h) of a 2100 kW mill grinding to a surface area of 350m 2 /kg. iii) What would the output be if the mill was operated in closed circuit using a turbo type separator (assume a rejects (tailings) surface area of 180 m 2 /k‑g and a circulating load of ) ?