Premier African Minerals Ltd (AIM:PREM, OTC:PRMMF) shares surged 17% to 0.027p after the company reported a key milestone in the restart of operations at its Zulu lithium and tantalum project in Zimbabwe. The mining group said ore from the run-of-mine stockpile is now being fed through the newly installed flotation plant, marking the latest step in efforts to bring the project back into production.