Analisis Pengaruh Penambahan CaCl2 dalam Proses Smelting Pasir Monasit Menggunakan Electric Arc Furnace terhadap Komposisi Senyawa dan Grade ThO2

Magfuri, Hamdan Kafi (2022) Analisis Pengaruh Penambahan CaCl2 dalam Proses Smelting Pasir Monasit Menggunakan Electric Arc Furnace terhadap Komposisi Senyawa dan Grade ThO2. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Permintaan listrik yang terus meningkat menjadikan Pembangkit Listrik Tenaga Nuklir (PLTN) terus mengalami pengembangan. Saat ini torium mulai digunakan untuk menggantikan uranium dalam PLTN, karena memiliki sifat yang lebih baik. Di bumi ini unsur torium terdapat dalam mineral pasir monasit dalam bentuk oksida. Tujuan penelitian ini adalah untuk menganalisis pengaruh penambahan CaCl2 sebagai flux dalam proses smelting pasir monasit menggunakan electric arc furnace terhadap senyawa yang terbentuk, komposisi senyawa utama, grade ThO2, dan recovery senyawa utama pada produk hasil smelting. Proses smelting dilakukan pada temperatur 1850OC selama 5 menit dengan menambahkan pasir monasit dari Bangka Belitung sebagai mineral utama, CaCO3 sebagai aditif, serbuk karbon sebagai reduktor, dan CaCl2 sebagai flux dengan variasi penambahan 0%, 15%, 25%, dan 35% dari massa total, kemudian produk dilakukan karakterisasi XRD dan XRF. Pada semua variasi didapatkan senyawa baru berupa perovskite (CaTiO3), ferrous-pseudobrookite (FeTi2O5), dan ilmenite (FeTiO3). Kadar (9,51%) dan recovery (34,27%) Fe2O3 terendah didapat pada penambahan 25% CaCl2. Kadar (33,3%) dan recovery (36,79%) TiO2 terendah didapat pada penambahan 35% CaCl2. Sementara itu, kadar (0,40%) dan recovery (90,73%) ThO2 tertinggi didapat pada penambahan 15% CaCl2. Meski demikian, pada produk hasil smelting masih terdapat banyak senyawa pengotor lainnya yang tidak terpisahkan. Hal ini menandakan perlu dilakukan proses pemisahan pasca smelting yang lebih optimal untuk memaksimalkan hasil yang ingin dicapai. ================================================================================================ The increasing demand for electricity makes Nuclear Power Plants (NPP) continue to develop. Currently, thorium is being used to replace uranium in nuclear power plants because it has better properties. On this earth, the element thorium is found in the mineral monazite sand in the form of an oxide. The purpose of this study was to analyze the effect of adding CaCl2 as a flux in the monazite sand smelting process using an electric arc furnace on the compounds formed, the composition of the main compounds, the grade of ThO2, and the recovery of the main compounds in the smelted product. The smelting process was carried out at a temperature of 1850OC for 5 minutes by adding monazite sand from Bangka Belitung as the main mineral, CaCO3 as an additive, carbon powder as a reducing agent, and CaCl2 as a flux with various additions of 0%, 15%, 25%, and 35% of the mass. Then the product was characterized by XRD and XRF. In all variations, new compounds were obtained in the form of perovskite (CaTiO3), ferrous-pseudobrookite (FeTi2O5), and ilmenite (FeTiO3). Obtained the lowest grade (9.51%) and recovery (34.27%) of Fe2O3 by adding 25% CaCl2. Obtained the lowest grade (33.3%) and recovery (36.79%) of TiO2 by adding 35% CaCl2. Meanwhile, obtained the highest grade (0.40%) and recovery (90.73%) of ThO2 with the addition of 15% CaCl2. However, there are still many other impurities in the smelted product that cannot separate. It indicates the need for a more optimal post-smelting separation process to maximize the results to be achieved.

Item Type: Thesis (Undergraduate)
Uncontrolled Keywords: CaCl2, flux, monasit, smelting, ThO2, monazite, smelting.
Subjects: T Technology > TN Mining engineering. Metallurgy > TN687 Electric furnaces.
Divisions: Faculty of Industrial Technology and Systems Engineering (INDSYS) > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis
Depositing User: Hamdan Kafi Magfuri
Date Deposited: 04 Feb 2022 02:16
Last Modified: 04 Feb 2022 02:16
URI: https://repository.its.ac.id/id/eprint/92781

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