They don't need to use chemicals. They can send concentrate out for final processing if required. That said they did get a massive uplift in the face to processed ore out of RoD of around 200% so not sure that is necessary.
The reason they haven't announced production figures is because they are about to recommend production at the end of the month.
AUL Price at posting:
0.5¢ Sentiment: Buy Disclosure: Held