THE EFFECT OF H3BO3 AND B2O3 ADDITION ON NICKEL MATTE FORMATION FROM SAPROLITIC NICKEL ORE AT 1100ºC-1350ºC
Saprolite nickel laterite ores are generally processed to produce ferronickel containing 10-30% Ni and 70-90% Fe, which can be used for manufacturing of stainless steel and other alloys. Commonly used technology for processing laterite nickel ore through pyrometallurgical routes is the Rotary Kil...
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| Format: | Theses |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/57909 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Saprolite nickel laterite ores are generally processed to produce ferronickel
containing 10-30% Ni and 70-90% Fe, which can be used for manufacturing of
stainless steel and other alloys. Commonly used technology for processing laterite
nickel ore through pyrometallurgical routes is the Rotary Kiln-Electric Furnace
(RK-EF). The RK-EF process requires a lot of energy because it operates at high
temperatures of 1400ºC–1700ºC. In this research, the effect of temperature and the
addition of H3BO3 and B2O3 on the reduction process of laterite nickel ore using
coal as a reducing agent were studied to see the formation of nickel in metal.
Saprolite nickel ore, coal, Na2SO4, H3BO3, and B2O3 agglomerate to form six types
of briquettes, namely briquettes A (10% coal addition, 20% Na2SO4), briquettes B
(10% coal addition, 20% Na2SO4, 5% H3BO3), briquettes C (addition of 10% coal,
10% Na2SO4, 10% H3BO3), briquettes D (addition of 10% coal, 10% H3BO3),
briquettes E (addition of 10% coal, 5.63% B2O3), and briquettes F (addition of 10%
coal, 10% Na2SO4, 5.63% B2O3) The reduction process was carried out at
temperatures of 1100ºC, 1200ºC, 1300ºC, and 1350ºC using a muffle furnace for
60 minutes. The reduced briquettes were then prepared to be observed using an
optical microscope. The results of observations using an optical microscope.
The experimental results obtained in the form of data on changes in sample weight
after being reduced and the appearance of the microstructure using an optical
microscope. The weight change data then compared with the Factsage simulation
results for analysis. From the experiment, it was concluded that increasing the
temperature could increase the weight of the mate produced. The addition of H3BO3
can lower the melting temperature of the slag so that the metal and slag are easier
to separate. B2O3 is proven more effective as an additive. |
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