CHARACTERIZATION OF BULI AREA NICKEL LATERITE, EAST HALMAHERA DISTRICT, NORT MOLUCCA PROVINCE
Indonesia, especially Sulawesi and Halmahera have rich reserves of laterite ore. Previously, nickel only used in the stainless-steel industry, however, the increasing rate of adoption of alternative energy has also increased market demand for laterite nickel ore for battery raw materials, especia...
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| Format: | Final Project |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/69744 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Indonesia, especially Sulawesi and Halmahera have rich reserves of laterite ore.
Previously, nickel only used in the stainless-steel industry, however, the increasing
rate of adoption of alternative energy has also increased market demand for laterite
nickel ore for battery raw materials, especially in the electric car industry.
Campagnol et al. estimated that with the current rate of electric car production, by
2025 there will be a shortage of nickel supply for electric car battery raw materials.
To meet the demand for nickel, more detailed research needed on the
characterization of laterite nickel deposits in the Buli area.
This study aims to determine the characteristics of the bedrock, determine the
characteristics of the deposits, and determine the appropriate processing method
for laterite ore in the study area. The data used is secondary data in the form of
bedrock samples ten drill points, XRF (X-Ray Fluorescence) analysis data ten drill
points, DEM (Digital Elevation Model), 247 logging photos, and ten logging
descriptions.
The laterite profile of the study area consists of overburden, limonite, saprolite and
bedrock. Based on petrographic analysis, the bedrock of the study area consists of
serpentinized harzburgite and serpentinite. The bedrock is moderate to strong
serpentinized with serpentinization occurring twice. Nickel carrier minerals olivine
and serpentine.
The bedrock influences the distribution of minor and major elements in the limonite
zone. For minor elements, higher Ni found in drill holes with harzburgite bedrock,
however, Co and MnO elements are lower than drill holes with serpentinite bedrock.
For major elements, higher SiO2 and MgO found in harzburgite drill holes, while
higher Fe and Al2O3 elements found in serpentinite drilled holes. There was no
significant difference in the distribution of minor and major elements in the
saprolite zone except for the MgO element. Higher MgO elements found in
serpentinite boreholes. Topography also affects the degree of laterization of the
laterite profile. The steeper the slope, the higher the degree of laterization.
Laterite ore in the study area divided into two, namely limonite ore and saprolite
ore. There are sixty-six saprolite ores that meet the nickel grade threshold, which
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are suitable for processing into ferronickel. There are seventeen ores derived from
limonite and saprolite which are suitable for processing into NPI (Nickel Pig Iron).
There are fourteen ores of limonite that meet the nickel threshold value which are
suitable for processing into MHP (Mixed Hydroxide Precipitate). |
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