Study of the Effect of Electric Current Strength and Magnet Height Distance with Belt Three Disc Magnetic Separator on Middling Reprocessing Results from Processing Minerals at PT Timah Tbk

Authors

  • Annisa Makarim Universitas Pembangunan Nasional “Veteran” Yogyakarta
  • Sudaryanto Sudaryanto Universitas Pembangunan Nasional “Veteran” Yogyakarta

Keywords:

Three Disc Magnetic Separator, Middling, Cassiterite

Abstract

This study aims to reprocess middlings from the mineral processing process carried out at PT Timah Tbk which still contains cassiterite minerals using a three disc magnetic separator tool with variations in electric current strength and distance between the height of the magnet and the belt. Sn content will be analyzed using XRF. Variations in the strength of the electric current used are ranging from 0.3 A to 1.3 A which will be divided into 3 variations and variations in the height distance of the magnet with the belt used, namely 0.7, 1 and 1.3 cm. This research was carried out 9 times of testing which will be sought for the optimum level and recovery produced. The results showed the distribution of tin distribution in each size fraction. In addition, the Sn content and Sn recovery produced also varied for each test variation. The highest Sn content (%), 27.1%, was obtained in the test with the highest electric current strength variation and the smallest magnet height distance. Meanwhile, the highest recovery of 85.12% was obtained in the test with the smallest electric current strength and the largest magnetic height distance. Based on the results of the study, the higher the electric current strength used, the higher the Sn content obtained, but the lower the Sn recovery obtained. Meanwhile, the higher the height distance of the magnet with the belt used, the lower the Sn content obtained but the higher the Sn recovery obtained. As well as for the optimum levels and recovery obtained in research using strong electric current and the height distance of the magnet with a medium belt with Sn content of 12.2% and Sn recovery of 54.67%.

References

Agustina, I Putu. (2022). Optimasi Pengaruh Parameter Terhadap Sifat Mekanis pada Sambungan Similar Baja Tahan Karat AISI 304. Jurnal METTEK, 8(1), 59-64.

Agustriyana, L., & Surya Irawan. (2011). Pengaruh Kuat Arus dan Waktu Pengelasan pada Proses Las Titik (Spot Welding) Terhadap Kekuattan Tarik dan Mikrostruktur Hasil Las Dari Baja Fasa Ganda (Ferrite-Martensite). Jurnal Rekayasa Mesin, 2(3), 175-181.

ASM International. (1992). ASM Metals Handbook, Vol 02 Non Ferrous. United States America: ASM International.

Bell Helicopter Textron, I. (2019). BELL 412EPI Product Spesifications. Texas: Bell Helicopter Textron Inc.

Bianto, Adli. (2022). Pengaruh Variasi Arus pada Las Spot Welding Material Beda Jenis SUS 301 dan DIN L4003. Teknik Mesin. Universitas Muhammadiyah Ponorogo.

Daniswara, M Audris. (2022). Analisis Proses Resistance Spot Welding Terhadap Sifat Mekanis (Destructive Test) Aluminium 2024-T42 pada Part Cover Side L Pesawat NC-212i PT. Dirgantara Indonesia. Teknik Mesin, Universitas Muhammadiyah Malang.

Deng, L., Li, Y. B., Haselhuhn, A. S., & Carlson, B. E. (2020). Simulating Thermoelectric Effect and Its Impact on Asymmetric Weld Nugget Growth in Aluminum Resistance Spot Welding. Journal of Manufacturing Science and Engineering, Transactions of the ASME, 142(9).

Fuad, Bian Yusriansyah., dkk. (2020). Pengaruh Kombinasi Ketebalan Plat Aluminium 2024 T42 Terhadap Sifat Mekanis pada Proses Resistance Spot Welding Part Door Assy Helikopter NBELL 412EP. Seminar Nasional Teknologi dan Rekayasan (SENTRA), 2527-6050.

Fuadi, Afirus Nurul. 2019. Analisa Fatigue Index Untuk Menentukan Batas Calender Time Usia Pakai Pesawat Hawk Skadron Udara 1. Teknik Mesin, Universitas Muhammadiyah Pontianak.

Haikal. (2014). Pengaruh Tegangan Listrik dan Waktu Pengelasan Terhadap Sifat Fisik dan Mekanik Sambungan Las Titik (Resistance Spot Welding) Logam Tak Sejenis 3 Lapis 316L, SS400, J1. Teknik Mesin, Universitas Sebelas Marert Surakarta, Surakarta.

Harsono Wiryosumarto, T. O. (2000). Teknologi Pengelasan Logam. Jakarta: PT. Pradnya Paramita.

Hendaryati, H., dkk. (2022). Pengaruh Variasi Ketebalan Plat Aluminium 2024 T42 Terhadap Kekuatan Tarik dan Macrography Pada Proses Resistance Spot Welding. Jurnal Terapan Teknik Mesin, 3(2). 96 – 107.

Ibrahim, Setiani., dkk. (2020). Pengaruh Variasi Arus Terhadap Sifat Mekanis dan Daerah Weld Nugget pada Pengelasan Titik Collar Muffler. Jurnal Vokasi Teknologi Industri, 2(1). 2656 – 6664.

Lucky, Julius. (2017). Analisa Proses Friction Stir Welding Pada Plat Aluminium Jenis A1100.

Nugroho, Fajar. (2015). Pengaruh Rapat Arus Anodizing Terhadap Nilai Kekerasan Pada Plat Aluminium Paduan AA Seri 2024-T3. Jurnal Angkasa, 7(2).

Pavlou, D. G. (2002). A phenomenological fatigue damage accumulation rule based on hardness increasing, for the 2024-T42 aluminum. Engineering Structures, 24(11), 1363–1368.

Purwanti, Endang Pudji. (2017). Analisa Pengaruh Parameter Pengelasan Spot Welding Terhadap Shear Strength Menggunakan Metode Taguchi. Seminar Matermatika dan Pendidikan Matematika.

SAE International, E. (2017). Aerospace Material Specification - AMS QQ-A-250/5B. SAE International.

Septian, Andino. (2021). Redesain JIG dan Fixture UntukInstalansiRadome dan Maletero pada Pesawat N212-400 PT Dirgantara Indonesia. Fakultas Vokasi. Institut Teknologi Sepuluh Nopember.

Smith, W. F. (1993). Foundations of Materials Science and Enginering. New York: McGraw- Hill Inc.

Teknik Mesin. Universitas Muhammadiyah Malang.

Wiryosumarto, Harsono. (2000). Teknologi Pengelasan Logam. Jakarta: PT. Pradnya Paramita.

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Published

2024-12-30

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Vol. 1 No. 2 (2024): The International Conferences on Engineering Sciences

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