# Effects of particle sizes and roasting temperature on the Fe-Ni enrichment of limonite ore from the Wolo mine area, Southeast Sulawesi, using corncob char as reductant
> Sufriadin

URL kanonis: https://discover.unhas.ac.id/publications/effects-of-particle-sizes-and-roasting-temperature-on-the-fe-ni-enrichment-of-li
Jurnal / Konferensi: Iop Conference Series Earth and Environmental Science
Tahun terbit: 2024
DOI: https://doi.org/10.1088/1755-1315/1422/1/012007
ISSN: 17551307
Citations: 0

## Authors
- Sufriadin

## Abstract
Abstract The reduction roasting of a limonite ore sample from the Wolo mine area was investigated using corncob char as a reductant. The objectives of this study were to analyze the effects of particle sizes and roasting temperature on the mineralogical transformation and Fe-Ni enrichment during the roasting process. The limonite ore was prepared into three size fractions of mesh sieves (-100+150, -150+200, and -200 mesh). Limonite ore was roasted with 2g of corn cob char reductant at temperatures ranging between 800 °C and 1100 °C with a 1-hour reduction time. Limonite ore and roasted products were analyzed to determine the mineral and chemical composition using optical microscopy, X-ray diffraction (XRD), and X-ray fluorescence (XRF) methods. Results of the mineralogical analysis indicated that the sample contained chlorite, goethite, lizardite, maghemite, and quartz. Limonite ore is mainly composed of Fe 2 O 3 (53.59%), followed by SiO 2 (12.16%), MgO (2.63%), and Ni (1.52%). Results of reduced roasting of limonite ore exhibited that the ore minerals were transformed into spinel, wustite, fayalite, and some tetrataenite (FeNi). The ore with -100+150 mesh particle and heated at 1,000 °C provided the optimum enrichment of 1.74% Ni and 42.87% Fe, respectively.

## Keywords
- Limonite
- Corncob
- Roasting
- Char
- Metallurgy
- Particle (ecology)
- Particle size
- Environmental science
- Materials science
- Waste management
- Chemistry
- Geology
- Chemical engineering
- Coal
- Engineering
- Hematite
- Raw material
- Oceanography
- Organic chemistry

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Sumber: Discover Unhas — RIMS Universitas Hasanuddin.
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