Analisis Pengaruh Penambahan SiO2 dalam Proses Smelting Pasir Monasit menggunakan Electric Arc Furnace terhadap Komposisi Senyawa dan Grade ThO2

Wienar, Mochammad Afrizul (2022) Analisis Pengaruh Penambahan SiO2 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

Kebutuhan energi listrik di dunia semakin lama akan semakin meningkat. Salah satu pemasok energi listrik berasal dari PLTN berbahan bakar uranium, akan tetapi semakin banyak digunakan maka cadangan uranium di bumi akan semakin berkurang sehingga manusia mulai mencari bahan bakar alternatif lain yaitu menggunakan torium. Tujuan dari penelitian ini untuk menganalisis pengaruh penambahan fluks SiO2 dalam proses smelting pasir monasit menggunakan metode electric arc furnace terhadap senyawa yang terbentuk pada produk, komposisi senyawa utama, nilai recovery pada senyawa utama dan grade ThO2. Smelting menggunakan sumber energi listrik dengan kuat arus 60A dan tegangan 40volt pada temperatur 18500C selama 3 menit. Sampel utama proses smelting berupa pasir monasit ditambahkan dengan CaCO3 sebagai aditif, karbon sebagai reduktor utama dan SiO2 sebagai fluks dengan variasi penambahan massa fluks 0%, 9%, 18% dan 27%. Produk smelting dilakukan karakterisasi dengan pengujian XRD dan XRF. Pada hasil smelting didapatkan senyawa seperti perovskite (CaTiO3), ilmenite (FeTiO3), dan ferrous-pseudobrookite (FeTi2O5) dan fayalite (Fe2SiO4) yang terbentuk pada semua variasi penambahan massa SiO2 sebesar 0%, 9%,18% dan 27%. Serta terbentuk senyawa calcium-orthosilicate (Ca2SiO4) pada variasi 27%. Penambahan fluks memberikan dampak terhadap senyawa utama seperti Fe2O3 memiliki kadar terendah (2,77%) dan recovery terendah (9,8%) pada variasi 9%, senyawa TiO2 memiliki kadar tertinggi (51,8%) dan nilai reocvery tertinggi (62,2%) pada variasi 9%, penambahan fluks SiO2 tidak efektif untuk menghilangkan kadar TiO2. Secara umum proses smelting meningkatkan kandungan ThO2 pada pasir monasit dengan kadar tertinggi (0,46%) dan nilai recovery tertinggi (90,2%) pada variasi 9%. ================================================================================================= The demand for electrical energy in the world will increase over time. One of the suppliers of electrical energy comes from nuclear power plants with uranium fuel, but the more it is used, the less uranium reserves on earth will start, so people are starting to look for other alternative fuels, namely using thorium. The purpose of this study was to analyze the effect of adding SiO2 flux in the monazite sand smelting process using the electric arc furnace method on the compounds formed in the product, the composition of the main compounds, the recovery value of the main compound and the grade of ThO2. Smelting uses an electrical energy source with a current of 60A and a voltage of 40 volts at a temperature of 18500C for 3 minutes. The main sample of the smelting process in the form of monazite sand added with CaCO3 as an additive, carbon as the main reducing agent and SiO2 as a flux with variations in the addition of flux mass 0%, 9%, 18% and 27%. The smelting product was characterized by XRD and XRF testing. In the smelting results, compounds such as perovskite (CaTiO3), ilmenite (FeTiO3), and ferrous-pseudobrookite (FeTi2O5) and fayalite (Fe2SiO4) formed in all variations of SiO2 mass addition of 0%, 9%, 18% and 27%. And calcium-orthosilicate (Ca2SiO4) compound was formed at a variation of 27%. The addition of flux has an impact on the main compound such as Fe2O3 having the lowest content (2.77%) and the lowest recovery (9.8%) at a variation of 9%, TiO2 compound has the highest content (51.8%) and the highest recovery value (62, 2%) at 9% variation, the addition of SiO2 flux was not effective to remove TiO2 content. In general, the smelting process increases the ThO2 content in monazite sand with the highest concentration (0.46%) and the highest recovery value (90.2%) at a variation of 9%.

Item Type: Thesis (Undergraduate)
Uncontrolled Keywords: Electric Arc Furnce, Fluks, Monasit, SiO2 Torium, Electric Arc Furnce, Flux, Monazite, SiO2, Torium.
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: Mochammad Afrizul Wienar
Date Deposited: 06 Feb 2022 09:24
Last Modified: 06 Feb 2022 09:24
URI: https://repository.its.ac.id/id/eprint/92852

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