Studi Pengaruh Variasi Massa Gipsum Terhadap Kadar Serta Recovery Ni Dan Fe Dalam Proses Reduksi Selektif Bijih Nikel Laterit Limonitik

Muhammad Pasha, Rafiedhia Abel (2021) Studi Pengaruh Variasi Massa Gipsum Terhadap Kadar Serta Recovery Ni Dan Fe Dalam Proses Reduksi Selektif Bijih Nikel Laterit Limonitik. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Kebutuhan baterai Nickel Mangan Cobalt (NMC) yang semakin meningkat mengakibatkan bijih nikel laterit limonitik mulai dilirik dengan melalui proses reduksi selektif. Penelitian ini bertujuan untuk memproduksi ferro-nikel dengan kadar dan recovery nikel yang tinggi melalui penambahan gipsum (CaSO4) sebagai aditif, mengetahui senyawa produk reduksi, dan faktor selektivitas. Variasi massa gipsum yang digunakan antara alain 0%, 4%, 8%, 12%, dan 16% dari total massa briket. Penelitian dilakukan dengan temperatur reduksi 1400oC dan waktu tahan 6 jam. Kemudian hasil reduksi dilakukan pemisahan secara magnetik. Berdasarkan hasil pengujian dan analisa data dari penelitian yang telah dilakukan maka diperoleh kesimpulan, yaitu faktor selektivitas tertinggi (5,72) diperoleh melalui penambahan 12% CaSO4. Selain itu kadar Ni (4,13%) dan Recovery Ni (91,81%) tertinggi diperoleh melalui penambahan 12% CaSO4. Fasa kamacite dan taenite yang ditenumkan dalam produk hasil reduksi menandakan bahwa proses reduksi berhasil dilakukan. Senyawa lain seperti troilite (FeS), Olivine (MgFeSiO4), fayalite (FeSiO4) mengkonfirmasi banyaknya unsur Fe yang tidak membentuk logam Fe sehingga mengakibatkan recovery Fe yang rendah.
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Due to the increasing demand for Nickel Manganese Cobalt (NMC) batteries, limonitic laterite nickel ore processing through selective reduction processes has become more popular. This study aims to produce ferronickel with high nickel content and recovery by adding gypsum (CaSO4) as an additive. The variations that used were 0%, 4%, 8%, 12%, and 16% CaSO4 of briquettes. This experiment was done by using 1400oC as temperature and 6 hours holding time. The product is then separated by magnetic methods, followed by tested the product using EDX for elemental composition and XRD for compound composition. According to the test results and data, the highest selectivity factor (5.72) was obtained by adding 12% CaSO4. The highest Ni Grade (4,13%) and Recovery (91,81%) were also obtained by adding 12% CaSO4. The kamacite and taenite phases that founded in the product indicate that the reduction process was successful. Other compounds such as troilite (FeS), olivine (MgFeSiO4), fayalite (FeSiO4) confirm the amount of Fe element which does not form Fe metal, resulting in low Fe recovery.

Item Type:	Thesis (Undergraduate)
Uncontrolled Keywords:	Reduksi selektif, Nikel, Laterit Limonitik, Aditif, Gipsum,Selective Reduction, Nickel, Laterite Limonitic, Additive, Gypsum
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:	Rafiedhia Abel Muhammad Pasha
Date Deposited:	24 Feb 2021 12:42
Last Modified:	24 Feb 2021 12:42
URI:	http://repository.its.ac.id/id/eprint/82788

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