The miner suspended all of its rail operations on Monday after it derailed the iron ore train, damaging 1.5 kilometres of track and crushing numerous 268 fully-laden wagons in the process.
The train travelled 92km in 50 minutes before being derailed at Turner's Siding, 120km south of its destination. "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. No-one was injured in the incident.
Separate investigations into the train derailment are being conducted by the Australian Transport Safety Bureau (ATSB), the Office of the National Rail Safety Regulator and BHP.
The loaded train consisted of four locomotives and 268 wagons. While the driver was outside the train, it took off with no one on board.
The derailment came after the train ran away at high speed for almost 100 kilometres (62 miles).
Dutch businessman, 69, seeks to legally identify as 20 years younger
You're only as old as you feel . "We can make our own decisions if we want to change our name, or if we want to change our gender. Mr Ratelband claims he is discriminated against because of his age and encounters problems in Dutch society on a daily basis.
After traveling about 55 miles, it was deliberately derailed by a company control center in Perth, according to ATSB.
BHP said in a statement on Wednesday that its reserves of the steelmaking ingredient at the Port Hedland hub were not expected to cover the entire period of disruption following the incident, and that it would be liaising with its customers about its contractual commitments over that time.
Port Hedland is the world's largest iron ore exporting terminal, used by BHP as well as other miners.
"We are working with the appropriate authorities to investigate the situation".
On Wednesday, the company also said in a statement it can not speculate on the outcome of the investigation.
BHP said recovering the train and fixing the track - a key access route for the enormous mining facility - will take around a week.