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  -