TY - GEN CY - UNIVERSITAS LAMPUNG ID - eprints57359 UR - http://digilib.unila.ac.id/57359/ A1 - Wahyuningsih, 1517041010 Y1 - 2019/// N2 - Telah dilakukan penelitian tentang Pengaruh Jumlah Reduktor, Temperatur dan Waktu Tahan pada Proses Reduksi Selektif Bijih Laterit Kadar Nikel Rendah- Alumina Tinggi (0,5Ni-44Fe-16 Al2O3). Bijih nikel laterit direduksi dengan batubara antrasit sebanyak 5 sampai 15% berat reduktor batubara antrasit dan10% berat natrium sulfat dengan temperature 950oC, 1050oC, dan 1150oC dengan waktu tahan 60 menit, 90 menit, dan 120 menit. Proses pemisahan magnetic untuk memisahkan konsentrat dan tailing.Analisis dilakukan dengan AAS, XRD dan SEM. Proses optimal menunjukkan pada reduksi nikel dengan 10% berat antrasi tpada temperatur 1050°C dengan waktu 120 menit menghasilkan 0,84% kadar nikel di konsentrat. Fasa troilite tidak dihasilkan pada proses reduksi nikel. Kadar besi (Fe) meningkat seiring dengan peningkatan temperature reduksi. Semakin lama waktu tahan pada proses reduksi selektif maka dapat meningkatkan kadar nikel tetapi menurunkan kadar besi. Kata kunci: reduksi selektif, pemisah magnetik, bijih nikel, natrium sulfat, antrasit In this present study, the effect of reductant dosage, temperature and holding time on selective reduction process of high alumina-lateritic nickel ore have been investigated clearly. The lateritic nickel ore was reduced with 5 until 15 wt. % anthracite and 10 wt.% sodium sulfate at reduction temperature of 950°C,1050°C and1150°C for 60, 90 and 120 minutes. Magnetic separation process was then conducted to separate the concentrate and tailing. The analysis of reduced nickel ore is performed by the Atomic Absorption Spectroscopy, X-Ray Diffraction, and Scanning Electron Microscopy. The optimal process resulted from the reduction of nickel ore with 10 wt. % anthracite at the temperature of 1050°C for 120 minutes which resulted in 0,84% nickel in concentrate. The troilite was not found in reduced ore. The iron grade increased along the increased of reduction temperature. The longer of holding time in selective reduction process increased the nickel grade but it decreased the iron grade. Keywords: selective reduction, magnetic separation, nickel ore, sodium sulfate, anthracite PB - FAKULTAS MATEMATIKA DAN ILMU PENGETAHUAN ALAM TI - PENGARUH JUMLAH REDUKTOR, TEMPERATUR DAN WAKTU TAHAN PADA PROSES REDUKSI SELEKTIF BIJIH LATERIT KADAR NIKEL RENDAH-ALUMINA TINGGI (0,5 Ni-44 Fe-16 Al2O3) AV - restricted ER -