Rahmawati, Denis (2024) Ekstraksi Logam Tanah Jarang dari Terak Timah Hasil Fusi Alkali dengan Metode Solvent Extraction Menggunakan D2EHPA. S1 thesis, Fakultas Teknik Universitas Sultan Ageng Tirtayasa.
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Abstract
Indonesia is one of the countries included in the Southeast Asia Tin Belt, or the Southeast Asian Tin Belt, with quite abundant cassiterite (SnO2) mineral reserves. Generally, the mineral cassiterite is bound or associated with minerals containing rare earth metals (LTJ) such as cenotim (YPO4) and monazite (Ce, La, Nd, Th) PO4. The LTJ carrier minerals are carried along in the tin smelting process and come out as a by-product of tin smelting, namely tin slag. Until now, tin slag II in Indonesia has been considered waste, and its utilization has not been maximized, so it tends to be piled up in special waste storage locations. However, it turns out that tin slag contains rare earth metals (LTJ), which have economic value if processed. LTJ is a strategic mineral group for future technological advances. In the years to come, REE commodities will play a very important role in the application of environmentally friendly energy sources. Tin slag II is processed using hydrometallurgical technology, namely leaching and solvent extraction (SX). Before leaching, tin slag needs to be pre-treated, namely alkali fusion, to reduce the SiO2 content by reacting it with fusion agents such as NaOH, KOH, and Na2CO3. The recovery process using SX was chosen because it has the advantages of a high level of selectivity for extracting REEs, a fast separation process, affordable costs, and can be used on a large scale. The research variables in the SX process are variations in D2EHPA extractant concentration (0.1; 0.5; 1; 1.5; 2 M), O/A ratio (1/1, 2/1, 3/1), and duration of stirring. (5, 15, 25, 35, 45 minutes). The research results show that NaOH is the best fusion agent to reduce SiO2, with a SiO2 solubility percentage of 36.52%. The best conditions for extracting REEs are at a concentration of 0.5 M D2EHPA, an O/A ratio of 3/1, and a stirring time of 35 minutes, resulting in an extraction percentage of 97.52% Ce, 92.78% La, 92.43% Nd, 90.34% Pr, and 99.41% Y, and stripping percentages of 99.27% La, 59.32% Ce, 46.38% Pr, 34.67% Nd, and 1.49% Y.
| Item Type: | Thesis (S1) | |||||||||
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| Additional Information: | Indonesia merupakan salah satu negara yang termasuk dalam jalur The Southeast Asia Tin Belt atau sabuk timah Asia Tenggara dengan cadangan mineral kasiterit (SnO2) yang cukup melimpah. Umumnya mineral kasiterit berikatan atau berasosiasi dengan mineral yang mengandung logam tanah jarang (LTJ) seperti senotim (YPO4) dan monasit (Ce, La, Nd, Th) PO4. Mineral pembawa LTJ tersebut ikut terbawa dalam proses peleburan timah dan keluar sebagai produk samping peleburan timah yaitu terak timah. Hingga saat ini terak timah II di Indonesia dianggap limbah dan pemanfaatannya belum maksimal sehingga cenderung ditumpuk di lokasi khusus penampungan limbah. Namun ternyata terak timah mengandung logam tanah jarang (LTJ) yang bernilai ekonomis jika diolah. LTJ merupakan kelompok mineral strategis bagi kemajuan teknologi di masa depan. Tahun-tahun di masa mendatang, komoditas LTJ akan sangat berperan penting pada aplikasi sumber energi ramah lingkungan. Terak timah II diolah menggunakan teknologi hidrometalurgi yaitu pelindian dan solvent extraction (SX). Sebelum dilakukan pelindian, terak timah perlu dilakukan pre-treatment yaitu fusi alkali untuk mengurangi kandungan SiO2 dengan cara mereaksikannya dengan agen fusi seperti NaOH, KOH, dan Na2CO3. Proses recovery menggunakan SX dipilih karena memiliki kelebihan yaitu tingkat selektifitas tinggi untuk mengekstraksi LTJ, proses pemisahan cepat, biaya terjangkau, dan dapat digunakan dalam skala besar. Variabel penelitian pada proses SX yaitu variasi konsentrasi ekstraktan D2EHPA (0,1; 0,5; 1; 1,5; 2 M), rasio O/A (1/1, 2/1, 3/1), dan lamanya pengadukan (5, 15, 25, 35, 45 menit). Hasil penelitian menunjukkan bahwa NaOH merupakan agen fusi terbaik untuk mengurangi SiO2 dengan persen kelarutan SiO2 yaitu 36,52%. Kondisi terbaik untuk mengekstraksi LTJ yaitu pada kondisi konsentrasi 0,5 M D2EHPA, rasio O/A 3/1, dan lama pengadukan 35 menit menghasilkan persen ekstraksi 97,52% Ce, 92,78% La, 92,43% Nd, 90,34% Pr, dan 99,41% Y serta menghasilkan persen stripping 99,27% La, 59,32% Ce, 46,38% Pr, 34,67% Nd, dan 1,49% Y. | |||||||||
| Subjects: | T Technology > TN Mining engineering. Metallurgy | |||||||||
| Divisions: | 03-Fakultas Teknik 03-Fakultas Teknik > 27201-Jurusan Teknik Metalurgi |
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| Depositing User: | Denis Rahmawati | |||||||||
| Date Deposited: | 02 Jul 2024 11:48 | |||||||||
| Last Modified: | 03 Jul 2024 11:20 | |||||||||
| URI: | http://eprints.untirta.ac.id/id/eprint/37361 |
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