Ferro-silico-manganese production from manganese ore and …
The copper smelting slag used in this study was supplied by PT. Smelting, Gresik, East Java, Indonesia. The manganese ore was obtained from East Nusa Tenggara Province, Indonesia. The slag was ground using a ball mill, sieved to obtain grain size of less than 65 mesh (210 µm), and then dried at 135 °C for 24 h.