Pengaruh Holding Time dan Temperatur Terhadap Proses Recovery Ni dan Co Dari Slag Nikel Melalui Proses Smelting

Setiawan, Jonathan William (2025) Pengaruh Holding Time dan Temperatur Terhadap Proses Recovery Ni dan Co Dari Slag Nikel Melalui Proses Smelting. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Nikel dan kobalt merupakan unsur krusial dalam produksi baterai kendaraan listrik. Indonesia, sebagai pemilik cadangan bijih nikel laterit terbesar di dunia, sebagian besar mengolahnya melalui proses Rotary Kiln-Electric Furnace (RKEF) dan Converter Furnace, menghasilkan nickel matte dan slag. Namun, slag dari converter furnace seringkali masih mengandung logam berharga seperti nikel (0,738 wt% NiO) dan kobalt (0,487 wt% CoO), menjadikannya berpotensi untuk pemulihan. Mengingat nickel converter slag keluar pada suhu tinggi (1200–1300 ∘C), proses carbothermic smelting secara pirometalurgi menjadi teknik recovery yang menarik. Penelitian ini bertujuan untuk menginvestigasi proses pemulihan nikel dan kobalt dari nickel converter slag melalui smelting berbasis pirometalurgi menggunakan induction furnace. Fokus utama adalah mengkaji pengaruh variasi temperatur dan waktu tahan terhadap efisiensi ekstraksi logam Fe, Ni, dan Co. Karakterisasi dilakukan dengan X-Ray Fluorescence (XRF) dan X-Ray Diffraction (XRD) untuk analisis komposisi kimia dan fasa kristal pada slag dan uji Atomic Absorption Spectroscopy (AAS) pada logam. Hasilnya, proses recovery Ni dan Co dalam bentuk paduan logam Fe-Ni-Co berhasil dicapai. Dengan menggunakan suhu 1500 ∘C selama 80 menit, diperoleh nilai recovery Ni dan Co tertinggi, masing-masing 88,1% dan 89,9%. Hasil penelitian ini menunjukkan potensi signifikan untuk menciptakan konsep waste-to-wealth dan dapat menjadi pertimbangan dalam operasi pembersihan slag.
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Nickel and cobalt are crucial elements in the production of electric vehicle batteries. Indonesia, possessing the world's largest lateritic nickel ore reserves, predominantly processes them through the Rotary Kiln-Electric Furnace (RKEF) and Converter Furnace processes, yielding nickel matte and slag. However, slag from the converter furnace often still contains valuable metals such as nickel (0.738 wt% NiO) and cobalt (0.487 wt% CoO), making it a potential source for recovery. Given that nickel converter slag is tapped out at high temperatures (1200–1300 ∘C), carbothermic smelting via pyrometallurgy presents an attractive recovery technique. This research aims to investigate the recovery of nickel and cobalt from nickel converter slag through pyrometallurgy-based smelting using an induction furnace. The primary focus is to examine the influence of temperature and holding time variations on the extraction efficiency of Fe, Ni, and Co metals. Characterization was performed using X-Ray Fluorescence (XRF) and X-Ray Diffraction (XRD) for chemical composition and crystal phase analysis of slag and Atomic Absorption Spectroscopy (AAS) on metal. The results show successful recovery of Ni and Co in the form of Fe-Ni-Co alloy. By employing a temperature of 1500 ∘C for 80 minutes, the highest recovery values for Ni and Co were achieved, at 88.1% and 89.9%, respectively. These findings demonstrate significant potential for creating a waste-to-wealth concept and can be considered for slag cleaning operations.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Cobalt, Nickel, Slag, Temperature, Waktu Tahan Cobalt, Holding Time, Nickel, Slag, Temperature
Subjects:	T Technology > TN Mining engineering. Metallurgy > TN799.N6 Nickel--Metallurgy
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis
Depositing User:	Jonathan William Setiawan
Date Deposited:	30 Jul 2025 03:49
Last Modified:	30 Jul 2025 03:49
URI:	http://repository.its.ac.id/id/eprint/123155

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