Firdausi, Safira (2020) Analisis Pengaruh Variasi Massa Limestone Terhadap Kadar Serta Recovery Ni Dan Fe, Dalam Proses Reduksi Langsung Bijih Nikel Laterit Menggunakan Reaktor Bed Batu Bara-Limestone. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Menipisnya cadangan nikel sulfida menyebabkan perlunya alternatif pengolahan nikel laterit yang optimum. Indonesia sendiri merupakan negara penghasil nikel laterit terbesar kedua dunia. Salah satu alternatif pengolahan bijih nikel yang lebih ramah lingkungan dan konsumsi energi lebih kecil adalah reduksi langsung. Penelitian ini bertujuan pada perbaikan komposisi dari material yaitu fluks limestone sehingga kadar, recovery dari Ni dan Fe serta faktor selektifitas yang didapatkan optimum. Variasi massa limestone yang dipilih adalah 16 g, 18 g, 20 g, 22 g, 24 g, dan 26 g. Proses dimulai dengan penghancuran, meshing, serta penimbangan bahan, melakukan pembuatan briket, memanaskan briket pada oven, dilanjutkan dengan pembuatan beda batu bara limestone sesuai variasi, dan dilakukan reduksi langsung dengan pre-heat 700oC selama 2 jam dan reduksi pada 1400oC selama 6 jam . Kemudian dilakukan separasi magnetik, penimbangan hasil logam, dan dilakukan analisis EDX untuk menentukan kadar serta XRD untuk mengetahui senyawa yang diperoleh, dan dilakukan perhitungan kadar, recovery, serta faktor selektivitas. Hasil perolehan kadar Fe tertinggi pada variasi massa limestone 16 gram, sebesar 87.58%. dan Ni tertinggi pada variasi massa limestone 22 gram, sebesar 18.75%, recovery Fe tertinggi pada variasi massa limestone 16gram, sebesar 28.91% dan Ni tertinggi pada variasi massa limestone 22gram, sebesar 99.34%, dan faktor selektivitas tertinggi pada variasi massa limestone 22 gram, sebesar 9.36%.
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Depletion of nickel sulfide reserves causes the need for an optimum alternative processing of laterite nickel. Indonesia itself is the second largest producer of laterite nickel in the world. One alternative to nickel ore processing that is more environmentally friendly and has less energy consumption is direct reduction. This study aims to improve the composition of the material, namely flux in the form of limestone so that the optimum levels and recovery of Ni and Fe are obtained as well as the selectivity factor of the product produced accordingly. The selected limestone mass variations are 16 gr, 18 gr, 20 gr, 22 gr, 24 gr and 26 gr. The process begins with crushing, meshing, and weighing the material, making briquettes, heating the briquettes in the oven, followed by making different limestone coal variations, and doing direct reduction with pre-heat 700oC for 2 hours and reducing at 1400oC for 6 hours. Then magnetic separation, weighing of metal products, and EDX analysis to determine the levels and XRD to determine the compounds obtained, and the calculation of levels, recovery, and selectivity factors are performed. The highest yield of Fe content in the 16 gram limestone mass variation was 87.58%. and the highest Ni in the 22 gram limestone mass variation, by 18.75%, the highest Fe recovery in the 16gram limestone mass variation, by 28.91% and the highest Ni in the 22gram limestone mass variation, by 99.34%, and the highest selectivity factor for the 22 gram limestone mass variation, amounted to 9.36%.
| Item Type: | Thesis (Other) |
|---|---|
| Additional Information: | RSMt 671.373 Fir a-1 2020 |
| Uncontrolled Keywords: | Reduksi Langsung, Nikel Laterit, Limestone. |
| Subjects: | T Technology > TN Mining engineering. Metallurgy |
| Divisions: | Faculty of Industrial Technology and Systems Engineering (INDSYS) > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis |
| Depositing User: | Safira Firdausi |
| Date Deposited: | 20 Dec 2023 03:03 |
| Last Modified: | 20 Dec 2023 03:03 |
| URI: | http://repository.its.ac.id/id/eprint/73230 |
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