According to the differences in reducibility of major elements in ocean polymetallic nodules, selective reduction smelting of the nodules is conducted in a DC arc furnace using carbon as reductant, obtaining acceptable Mn enriched slag and smelted alloy.

• 根据大洋多金属结核中各主要元素的还原性差异，用碳作还原剂，在直流电弧炉中选择性还原熔炼大洋多金属结核，获得了合格的富锰渣产品和熔炼合金。