Analisa Pengaruh Variasi Temperatur Pencucian Kristal NiSo₄. 6H₂O dari Larutan Leaching Ferronickel Menggunakan Aditif CaCO₃ Terhadap Hasil Kristalisasi

Maruf, Fazafi Izzul (2022) Analisa Pengaruh Variasi Temperatur Pencucian Kristal NiSo₄. 6H₂O dari Larutan Leaching Ferronickel Menggunakan Aditif CaCO₃ Terhadap Hasil Kristalisasi. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Baterai Li-ion telah diteliti secara luas selama beberapa tahun terakhir. Umumnya kendaraan listrik mengggunakan jenis baterai li-ion Nickel Manganese Cobalt (NMC). Untuk memproduksi baterai NMC, dibutuhkan material kristal nickel (II) sulphate hexahydrate (NiSO4.6H2O) sebagai material penyusun katoda baterai NMC. Kristal NiSO4.6H2O dapat diproduksi melalui proses hydrometallurgy dari material nickel pig iron, ferronickel, dan nickel matte. Pada penelitian ini, kristal NiSO4.6H2O diproduksi melalui proses hydrometallurgy dengan material ferronickel. Pengotor yang umum ditemukan pada produk akhir kristal NiSO4.6H2O ialah pengotor Fe dan Ca. Penelitian ini bertujuan untuk menghilangkan semaksimal mungkin pengotor Fe dan Ca untuk mendapatkan produk kristal dengan kemurnian yang tinggi. Proses pencucian kristal NiSO4.6H2O dilakukan dengan memvariasikan temperatur larutan pencuci yakni Aq.RT, Aq.50oC, Aq.75oC, dan Aq.100oC. Serbuk Ferronickel diproses melalui proses leaching dibawah tekanan atmosfer menggunakan 120 mL H2SO4 2M pada temperatur 90oC selama 6 jam, dilanjutkan dengan proses neutralization menggunakan aditif CaCO3 hingga pH 3,01. Selanjutnya, dilakukan proses pemanasan pada temperatur 90oC selama 24 jam. Setelah itu, dilakukan proses evaporative crystallization pada temperatur 60oC. Produk kristal hasil kristalisasi kemudian dicuci menggunakan akuades dan dikristalisasi kembali pada temperatur 60oC untuk mendapat produk akhir berupa kristal NiSO4.6H2O. Variasi temperatur pencucian Aq.100oC menghasilkan produk kristal dengan kadar Ni sebesar 24,36 wt% dengan kadar pengotor Ca dan Fe berturut-turut sebesar 1,01 wt% dan 0,25 wt%. Recovery Ni yang dihasilkan pada variasi Aq.100oC paling tinggi yakni sebesar 99,51%.
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Li-ion batteries have been extensively researched over the past few years. Generally, electric vehicles use li-ion Nickel Manganese Cobalt (NMC) batteries. To produce NMC batteries, nickel (II) sulfate hexahydrate (NiSO4.6H2O) crystal material is needed as the material for the NMC battery cathodes. NiSO4.6H2O crystals can be produced through the hydrometallurgy process from nickel pig iron, ferronickel, and nickel matte materials. In this study, NiSO4.6H2O crystals were produced through the hydrometallurgy process with ferronickel material. The impurities commonly found in the final product of NiSO4.6H2O crystals are Fe and Ca impurities. This study aims to remove as many as possible Fe and Ca impurities to obtain crystal products with high purity. The NiSO4.6H2O crystal washing process was carried out by varying the temperature of the washing solution, namely Aq.RT, Aq.50oC, Aq.75oC, and Aq.100oC. Ferronickel powder was leached under atmospheric pressure using 120 mL of 2M H2SO4 at a temperature of 90oC for 6 hours, followed by a neutralization process using CaCO3 additives to pH 3.01. Furthermore, the heating process is carried out at a temperature of 90oC for 24 hours. After that, the evaporative crystallization process was carried out at a temperature of 60oC. The crystallized product was then washed using distilled water and re-crystallized at a temperature of 60oC to get the final product in the form of NiSO4.6H2O crystals. The variation of washing temperature Aq.100oC resulted in a crystalline product with a Ni content of 24.36 wt% with impurity content of Ca and Fe of 1.01 wt% and 0.25 wt%, respectively. The Ni recovery produced at the highest variation of Aq.100oC is 99.51%.

Item Type:	Thesis (Other)
Additional Information:	RSMt 669.733 2 Mar a-1 2022
Uncontrolled Keywords:	ferronickel, leaching, neutralization, NiSO4.6H2O, NMC battery, washing
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:	- Davi Wah
Date Deposited:	20 Nov 2023 08:07
Last Modified:	20 Nov 2023 08:07
URI:	http://repository.its.ac.id/id/eprint/105134

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