32T axle load enables approximately 107 Wet Tonne loading per carriage.
Latest Investor Presentation states 28 hour round trip (312 trips per train per year) with 3 locos and 180 wagons per train.
312 x 107 x 180 = 6,009,120 Tonnes per train per year.
We would need 6 trains to achieve 35Mt per annum (a train departing every 4 hours).