The smelter presentation on the Gulf website states that they are AC arc furnaces. http://gulfmanganese.com/smelter-presentation/
MND Albemarle lithium downsize burns $200M hole in Monadelphous's pocket as latter's contracts terminated
KAI Pilbara Minerals buys land off Kairos part of its York gold project for $20M – and a 2% royalty on any PLS gold sales