Peter Carlsson, co-founder and leader of Northvolt since 2016, will remain as advisor as he quit a day after the firm filed for bankruptcy.
The restart marked exactly a century since the mine first went into production.
The company changed its board of directors and plans to spin out non-core assets La Verde, Capricho, and Paco Orco into a new company.
Most mining firms rely on their own diesel supplies to extract iron ore, diamonds, rutile and bauxite in the resource-rich country.