The train, comprising four locomotives and 268 wagons, travelled 92km before being deliberately derailed at a set of points operated by BHP's Integrated Remote Operations Centre, around 119km from Port Hedland.
According to Reuters, one of BHP's customers in China, a steel producer, has not yet received any notice from the miner.
The derailment came after the train ran away at high speed for almost 100 kilometres (62 miles).
BHP said Wednesday more than 130 people were working to recover the train and fix the track - a key access route for the enormous mining facility - with partial rail operations expected to start up again in about a week. "We've got no reason why we have to change the contracts and agreements we have with existing customers", he said, following the company' annual general meeting in Adelaide.
BHP will rely on its stockpile reserves at Port Headland to maintain operations at the export hub, it said, without commenting on any potential impact to shipments.
Industry specialists were confused about why the train would have run away down the tracks.
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The top diplomat said that other events lined up on the agenda of the visit would focus on culture, music, fashion, among others. The Prince of Wales joined in with traditional Ghanaian dancers, who celebrated the royal's arrival with a cultural display.
The driver of the 268-car train had stopped around 80 kilometres earlier to inspect one of the wagons.
"We can not speculate on the outcome of the investigation however we are working with the appropriate authorities and our focus remains on the safe recovery of our operations", a BHP spokeswoman said today. "We can not speculate on the outcome of the investigation", BHP said.
"We can not speculate on the outcome of the investigation, however we are working with the appropriate authorities and our focus remains on the safe recovery of our operations", the BHP spokeswoman said.
The Australian Transport Safety Bureau, the Office of the National Rail Safety Regulator and BHP are investigating.