Nurega, Muhammad (2023) Perngaruh Variasi Temperatur dan Konsentrasi Pelarut Terhadap Pelarutan Logam Tanah Jarang Dari Abu Terbang Batu Bara Dengan Metode Pelindian Asam. S1 thesis, UNIVERSITAS SULTAN AGENG TIRTAYASA.
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Abstract
Abu terbang batu bara (ATBB) adalah sisa pembakaran batu bara yang memiliki potensi dimanfaatkan lebih lanjut dengan mengekstrak logam berharga yang terkandung di dalamnya. Abu terbang batu bara terindikasi mengandung mineral berharga seperti logam tanah jarang (LTJ) yang terdiri dari 15 unsur lantanida, scandium, dan yttirium . Proses hidrometalurgi dengan metode pelindian dinilai cukup menguntungkan untuk mengekstrak LTJ dari abu terbang batu bara. Di dalam ATBB terdapat unsur Fe sekitar 15,041 % yang merupakan pengotor sekaligus akan mengkonsumsi reagen pelindi dalam pelindian asam. Selain itu, keberadaan LTJ yang tersimuti dalam matrik mineral silikat yang menyebabkan pelindian secara langsung menjadi kurang efektif. Oleh karena itu, perlu dilakukan proses praolahan terlebih dahulu melalui pemisahan magnetik yang dilanjutkan dengan proses pemanggangan sehingga pengotor besi terpisah dan struktur matrik silikat menjadi terbuka sehingga LTJ akan mudah larut dan pelindian menjadi lebih efektif. Penelitian ini bertujuan untuk mengkaji pengaruh temperatur dan konsentrasi CH3COOH dan H2SO4 terhadap besarnya pelarutan LTJ pada proses pelindian ATBB. Hasil penelitian menunjukkan bahwa, pelarutan LTJ tertinggi sebesar 0,4938 ppm pada konsentrasi CH3COOH 2 M dengan temperatur 70 oC selama 20 menit. Laju proses pelindian dipengaruhi oleh temperatur pelindian, dengan energi aktivasi tertinggi sebesar 114.8648 kJ/mol
| Item Type: | Thesis (S1) | |||||||||
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| Additional Information: | Fly ash from coal combustion (FACC) is the residual product of coal combustion that has the potential for further utilization by extracting valuable metals contained within it. Fly ash from coal combustion is indicated to contain valuable minerals such as rare earth metals (REM) consisting of 15 lanthanide elements, scandium, and yttrium. Hydrometallurgical processes using leaching methods are considered quite advantageous for extracting REM from fly ash from coal combustion. Within FACC, there is about 15.041% of iron (Fe) which acts as an impurity and also consumes leaching reagents during acid leaching. Furthermore, the presence of REM encapsulated within a silicate mineral matrix renders direct leaching less effective. Therefore, a pre-processing step is necessary, initially through magnetic separation followed by roasting to separate the iron impurities and open up the silicate matrix structure, allowing REM to dissolve easily and making leaching more effective.This study aims to examine the influence of temperature and concentrations of CH3COOH and H2SO4 on the extent of REM dissolution in the leaching process of FACC. The research results indicate that the highest REM dissolution is 0.4938 ppm at a concentration of 2 M CH3COOH with a temperature of 70°C for 20 minutes. The leaching process rate is influenced by the leaching temperature, with the highest activation energy being 114.8648 kJ/mol. | |||||||||
| Uncontrolled Keywords: | Abu Terbang Batu Bara, Logam Tanah Jarang, Pelindian, Asam Asetat, Asam Sulfat | |||||||||
| Subjects: | T Technology > TN Mining engineering. Metallurgy | |||||||||
| Divisions: | 03-Fakultas Teknik 03-Fakultas Teknik > 27201-Jurusan Teknik Metalurgi |
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| Depositing User: | Mr. Muhammad Nurega | |||||||||
| Date Deposited: | 11 Aug 2023 10:26 | |||||||||
| Last Modified: | 24 Aug 2023 10:25 | |||||||||
| URI: | http://eprints.untirta.ac.id/id/eprint/27982 |
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