1: copper
1.copper concentrate >15% sulfur 25%
2.copper ore >40%
3.copper compound >10%
sulfide or oxide both required
as
Minerals iron ore, mill scale, sintered iron
Iron ore, copper ore
Chromite Ore and Conc.
Manganese and iron ore, iron ore, manganese ore
Manganese ore and iron ore
Iron ore, manganese ore
Iron ore, tin ore