PENGARUH WAKTU REDUKSI DAN KOMPOSISI PELET TERHADAP PERSEN Fe METAL DAN PERSEN Ni FeNi SPONS DARI BIJIH NIKEL LIMONIT MENGGUNAKAN SIMULATOR ROTARY KILN [The Influence Of Reduction Time And Pellet Composition On Fe And Ni Metal Percentage Of Feni Sponge From Limonite Ore Reduced By Using Rotary Kiln Simulator] - Yopy Henpristian; Iwan Dwi Antoro; Soesaptri Oediyani (National Research and Innovation Agency (BRIN), 2014)