生产原材料（锰矿）主要来自进口,产品有95%以上出口。,印尼.马辰锰矿之品位如下：,锰,46.41%,氧化铝,1.48%,氧化钾,1.12%,氧化铁,1.56%,氧化钛,0.02%,氧化钙,1.79%,烧失量,18.70%,氧化镁,0.47%,磷,0.015%,氧化铬,0.02%,硫,0.018%,氧化钠,0.12%