QR National has signed two long term haulage agreements with Incitec Pivot to haul sulphuric acid.
The agreements include the transportation of sulphuric acid from Sun Metals and Incitec’s Mount Isa acid plant to Phosphate Hill, and formed sulphur from the Port of Townsville to Mount Isa.
The contract for the acid haulage is an extension of an existing contract with Incitec and incorporates increased tonnages, whereas the sulphur contract is new.
The Mount Isa acid plant itself was recently shutdown while maintenance is being carried out.
Incitec announced last year that it is also considering building a $400 million acid plant at Phosphate Hill.
QR has previously come under fire for its acid transportation, after a train moving sulphuric acid from Phosphate Hill jumped the rails outside of Cloncurry.
Despite the train carrying more than 1.5 megalitres of acid on board, there was only a very minimal amount of acid spilled.
"There’s only been about a cup spilled, which isn’t bad out of more than a million litres," Queensland Fire and Rescue Service inspector Ross Mutzelberg said at the time.
The acid is used in fertilsers and for explosives.