A train seems to arrive each day from the South between about 06:00 and 08:00 hrs. It is usually behind two locos (I noticed Q4017 and ALZ3208 on one day and two days later it was Q4009 and ALZ3208. It pulls about 13 container flats with about 26 containers on them (for Lead) and about 16 tanker wagons for powdered Nickel concentrate. The container flats are designated AQWY, the Nickel tanks are WNB.
With the current price of Nickel this quantity alone will be worth about $25M per train when refined. So about $8B of Nickel a year from Leinster (BHP Nickel West) comes through here. I could not find where the containers of lead are sourced, but they now go to Freemantle. The Nickel has its processing done near Kalgoorlie and then to Esperance (I think).
The Nickel is pumped up to towers at Leonora and drops down into the tanks on the train. The powder is corrosive and can wear through the ceramic lined piping of the loader. When they get these blowouts, they bandage the pipe and call for a maintenance team to replace the parts.
Some 30km South of Leonora, at Malcolm, Nickel concentrate from the Murrin Murrin mine is loaded in containers. This is concentrated through a different process and the concentrate for Leonora will go this way in the future. Some acid and ammonia tanks are also brought up from the South to be delivered to the various mines as appropriate. One of the trains to visit Leonora also brought fuel for the Shell depot at Leonora and delivered this to the fuel siding near to the loader. This was in seven tanker wagons (ATPF) and was about 600,000 litres worth. There are barracks for the train crews at both Malcolm and Leonora and some complex arrangements for crew changeovers.
The trains arriving in Leonora have to re-marshal their different rakes of wagons and to do this have to shunt across the Rajah Street level crossing. There are two main tracks in the yard, with one under the loader and a short spur for the fuel depot. The drivers say they could bring even more freight here if they had enough spare wagons to carry it.
When all the loading is done at Leonora, the train departs for the South about 12:00-13:00 hours. It seems possible that there could be other trains calling here, but I did not see them as I was away some of the time.