Direct Smelting Bijih Malasit dengan Variasi Waktu Holding Menggunakan Metode Electric Arc Furnace

Ridhollah, Abrar (2018) Direct Smelting Bijih Malasit dengan Variasi Waktu Holding Menggunakan Metode Electric Arc Furnace. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Logam tembaga merupakan salah satu logam yang pertama kali diolah dan dimanfaatkan sejak zaman Neolitik. Malasit, azurit, dan krisokola termasuk mineral yang mengandung logam tembaga dalam bentuk senyawa hidroksi-karbonat. Dengan teknologi direct smelting menggunakan electric arc furnace, bijih malachite yang berkadar tinggi hingga menengah dapat dilebur dan direduksi secara langsung sehingga didapati logam tembaga yang terpisah dari pengotornya. Penelitian ini dilakukan dengan direct smelting bijih malasit dengan kadar 15,66% Cu. Berdasarkan hasil pengujian dan analisa data dari penelitian yang telah dilakukan maka diperoleh kesimpulan, yaitu kadar dan recovery Cu tertinggi (87,09% Cu dengan recovery 94,95%) pada waktu holding selama 7 menit, sedangkan untuk kadar dan recovery Cu terendah (29,97% Cu dan 2,3%) pada waktu holding selama 2 menit.. Fasa dari analisa XRD p logam produk pada proses direct smelting dengan variasi waktu holding adalah logam Cu dan Fe. Didapati Cu terlarut di dalam slag dengan kadar tertinggi (3,99%) pada waktu holding 2 menit, serta kadar terendah (0,41%) pada waktu holding 5 menit. Fasa-fasa senyawa yang diidetifikasi melalui analisa XRD pada slag adalah pyroxene, fayalite, silicon carbide, chalcocite, dan magnetite. ================================================================================================== Copper is one of the first metal which had been used since the Neolitic Age. Malachite, azurite, and chrysocolla is included in the mineral category which contain copper as a hydroxi-carbonate compounds. With the direct smelting technology using electric arc furnace method, high-to-middle grade of malachite ore can be smelted and performed a reduction reactions directly which produce copper with few impurities. This research is conducted by direct smelting of malachite ore with 15,66% Cu. According to the test results and data analysis regarding the obtained research, the highest Cu grade and recovery (87,09% Cu and 94,95% recovery) is on 7 minutes of holding time, while the lowest Cu grade and recovery (29,97% Cu and 2,3% recovery) is on 2 minutes of holding time. The phase of the metal product according to XRD analysis with the holding time variations are Cu and Fe. There is an occurance of dissolved Cu in the slag with the highest percentage (3,99%) on 2 minutes of holding time, and the lowest one (0,41%) on 5 minutes of holding time. The identified phases which occur in slag is pyroxene, fayalite, silicon carbide, chalcocite, and magnetite.

Item Type: Thesis (Undergraduate)
Uncontrolled Keywords: copper, direct smelting, electric arc furnace, malachite,
Subjects: T Technology > TN Mining engineering. Metallurgy
T Technology > TN Mining engineering. Metallurgy > TN687 Electric furnaces.
Divisions: Faculty of Industrial Technology > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis
Depositing User: Abrar Ridhollah
Date Deposited: 09 Aug 2021 22:14
Last Modified: 09 Aug 2021 22:14
URI: https://repository.its.ac.id/id/eprint/52762

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