Kilangy, Danny Momat (2021) Study Of The Effect Of Ph Variation With CaCO3 Additive In Neutralization Process Of Ferronickel Leaching Solution From Mini Blast Furnace For Niso4.6h2o Synthesis. Undergraduate thesis, Institut Teknologi Sepuluh nopember.
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Abstract
Nickel (Ni) and cobalt (Co) are two metals essential to modern society; the major use of Ni is in stainless steels though demand for nickel sulfate hexahydrate (NiSO4.6H2O) in lithium-ion battery (NMC) cathodes is critical to electric vehicle (EV) power systems is growing. Laterite ore is an essential source of both Nickel and cobalt. Nickel in laterite can be extracted by hydrometallurgy processing which contains two steps: leaching and separation (neutralization) process. This study aims to analyze the effect of pH variation on the recovery of Ni, Fe and Co, the chemical composition and compounds formed during the neutralization process for NiSO4.6H20 synthesis. Ferronickel from a mini blast furnace was used as raw material, and NiSO4.6H20 was obtained through leaching using sulfuric acid (H2SO4) and peroxide acid (H2O2). The neutralization process was carried out using powder CaCO3 as additive with pH variations of 1.96, 3.01, 4.03, 5.04 and 6, followed by a crystallization process at a temperature of 70oC for 2 hours. Atomic Absorption Spectroscopy(AAS) analysis was used to determine the concentration of metals in the filtrate solutions from the neutralization process, while the characterization of crystal products was analyzed by Emission Dispersive X-Ray (EDX) and X-Ray Diffraction (XRD) testing. NiSO4.6H20 compound was found at each pH variation with the highest Ni recovery of 97.5% at pH 3.01. =====================================================================================================
Nikel (Ni) dan kobalt (Co) merupakan dua logam penting bagi masyarakat modern; penggunaan utama Ni yaitu sebagai katoda baterai lithium-ion (NMC) yang merupakan komponen utama kendaraan listrik (EV). Baterai NMC memiliki penyusun terbesar berupa nikel sulfate hexahydrate (NiSO4.6H2O). Bijih nikel laterit merupakan sumber penting dari Nikel dan kobalt. Nikel dalam bijih laterit bisa didapatkan dengan beberapa proses salah satunya yaitu hidrometalurgi. Penelitian ini bertujuan untuk menganalisis pengaruh variasi pH pada proses netralisasi terhadap recovery Ni, Fe dan Co untuk sintesis NiSO4.6H20. proses leaching dilakukan menggunakan asam sulfat (H2SO4) dan hidrogen peroksida H2O2, selanjutnya proses netralisasi dilakukan menggunakan aditif CaCO3 dengan variasi pH 1.96, 3.01, 4.03, 5.04 dan 6 yang kemudian dilanjutkan dengan proses kristalisasi pada tempratur 70oC selama 2 jam. Untuk menganalisa konsentrasi logam pada filtrat hasil netralisasi dilakukan pengujian AAS, sedangkan produk hasil kristalisasi dianalisis dengan menggunakan pengujian EDX dan XRD. Didapatkan senyawa NiSO4.6H20 pada seluruh variasi pH dan hasil terbaik pada pH 3.01 dengan konsentrasi Ni sebesar 97.5%.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Uncontrolled Keywords: | NMC battery, ferronickel, leaching , Neutralization , .NiSO4.6H2O |
| Subjects: | T Technology > TN Mining engineering. Metallurgy > TN677 Blast furnaces. T Technology > TN Mining engineering. Metallurgy > TN688 Hydrometallurgy |
| Divisions: | Faculty of Industrial Technology and Systems Engineering (INDSYS) > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis |
| Depositing User: | Danny Momat Kilangy |
| Date Deposited: | 17 Aug 2021 19:52 |
| Last Modified: | 21 Mar 2022 04:25 |
| URI: | http://repository.its.ac.id/id/eprint/86684 |
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