Zulyansyah, Dede (2018) Reduksi Langsung Bijih Nikel Laterit Limonitik dengan Variasi Jenis Reduktor terhadap Kadar Ni dan Fe serta Recovery Menggunakan Bed Batu Bara. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Pemanfaatan bijih nikel laterit low grade terus meningkat seiring dengan bertumbuhnya permintaan stainless steel. Proses reduksi langsung ternyata mampu meningkatkan kadar nikel laterit limonit dengan menggunakan gas CO dan CO2 sebagai agen pereduksi. Gas CO dan CO2 pada atmosfer reduksi didapat dari penambahan reduktor (batu bara, arang, green coke) dan fluks dolomit pada proses reduksi. Penelitian ini membahas pengaruh penambahan variasi jenis reduktor pada briket nikel laterit limonitik terhadap kandungan Ni dan Fe serta recovery Ni dan Fe. Briket direduksi dalam crucible bed menggunakan muffle furnace dengan cara direaksikan pada temperatur 14000C dengan waktu holding selama 6 jam. Pengujian EDX dan XRD dilakukan untuk mengetahui kadar dan recovery Ni dan Fe. Kadar Ni tertinggi diperoleh dengan menggunakan reduktor green coke yaitu sebesar 15,23%. Kadar Fe tertinggi diperoleh dengan reduktor arang batok kelapa yaitu sebesar 61,22%. Recovery Ni tertinggi yaitu dengan reduktor green coke yaitu sebesar 96% dan recovery Fe tertinggi yaitu dengan penambahan reduktor batu bara yaitu sebesar 18,8%. Adanya peningkatan kadar Ni dipengaruhi oleh ukuran pori reduktor sehingga menyebabkan kecepatan reaksi untuk menghasilkan kadar karbon yang lebih optimal.
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The utilization of low grade laterite nickel ore continues
to increase as dem
and for stainless steel and sulphide ore supply
decreases. The direct reduction process can increase the nickel
content of limonite laterite by using CO and CO2 as reducing
agents. CO and CO2 gases in the reduction atmosphere are
obtained from the addition
of reducing agents (coal, charcoal,
green coke) and dolomite flux to the reduction process. This study
discusses the effect of reductor on nickel limonitic nickel briquettes
on Ni and Fe content and recovery of Ni and Fe. The briquettes are
reduced by hea
ting to a temperature of 1400
0
C with a holding time
of 6 hours. The EDX and XRD tests were performed to determine
the levels and recovery of Ni and Fe. The highest Ni content was
obtained by using green coke reducer which was 15,23%. The
highest Fe content
was obtained by calculating coconut shell
charcoal reductor that is equal to 61,
22
%. Ni recovered the highest
with the addition of green coke redu
ctor that is equal to 96% and
Fe recovered the highest with the addition of
coal reductor that is
equal to 18,8%.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Additional Information: | RSMt 669.733 2 Zul r 3100018075891 |
| Uncontrolled Keywords: | Nickel laterite, Direct reduction, Dolomite, Coal, Shell chorcoal, Green coke, Bed, Nikel Laterit, Reduksi Langsung, Batu Bara, Arang |
| Subjects: | T Technology > TN Mining engineering. Metallurgy |
| Divisions: | Faculty of Industrial Technology > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis |
| Depositing User: | Dede Zulyansyah |
| Date Deposited: | 19 Dec 2018 04:31 |
| Last Modified: | 15 Oct 2020 07:24 |
| URI: | http://repository.its.ac.id/id/eprint/53409 |
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