Reduksi Langsung Bijih Nikel Laterit Limonitik dengan Variasi Jenis Reduktor terhadap Kadar Ni dan Fe serta Recovery Menggunakan Bed Batu Bara

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. ============================================================================================== 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
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 > (S1) Undergraduate Theses
Depositing User: Dede Zulyansyah
Date Deposited: 19 Dec 2018 04:31
Last Modified: 19 Dec 2018 04:31
URI: http://repository.its.ac.id/id/eprint/53409

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