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All Journal Jurnal Penelitian Rumpun Ilmu Teknik Proceeding of The International Conferences on Engineering Sciences
Sudaryanto Sudaryanto
Universitas Pembangunan Nasional “Veteran” Yogyakarta
Civil Engineering, Building, Construction & Architecture Computer Science & IT Electrical & Electronics Engineering Engineering

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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 Annisa Makarim; Sudaryanto Sudaryanto
Proceeding of the International Conferences on Engineering Sciences Vol. 1 No. 2 (2024): July : Proceeding of the International Conferences on Engineering Sciences
Publisher : Asosiasi Riset Ilmu Teknik Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/iconfes.v1i2.22

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%.
Proses Produksi Feronikel dari Bijih Nikel Laterit dengan Metode Rotary Kiln – Electric Furnace (RKEF) Sudaryanto Sudaryanto; Untung Sukamto; Ibnu Cahyo Nugroho
Jurnal Penelitian Rumpun Ilmu Teknik Vol. 2 No. 4 (2023): November : Jurnal Penelitian Rumpun Ilmu Teknik
Publisher : Lembaga Pengembangan Kinerja Dosen

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/juprit.v2i4.3456

Abstract

Indonesia is one of the leading producers of nickel. The process of producing nickel from laterite ore is mainly used to make ferronickel, nickel matte, or nickel metal. Laterite nickel ore with a Ni content greater than 1.8% can be processed through pyrometallurgical methods. The production of ferronickel using the Rotary Kiln-Electric Furnace method involves a series of steps, including the transportation of raw materials, drying of samples, moisture content testing, sample testing, smelting, pouring, and metal testing. The object of this study is laterite nickel from the Bahodopi and Pomalaa sites of PT Vale Indonesia Tbk. The object has been divided into four samples, namely Bahodopi Low Limit, Bahodopi Upper Limit, Pomalaa Low Limit, and Pomalaa Upper Limit, with varying levels of nickel content. The aim of this research is to produce ferronickel with a high nickel grade. The grade and recovery of nickel from the smelting of Bahodopi Low Limit, Bahodopi Upper Limit, Pomalaa Low Limit, and Pomalaa Upper Limit samples are as follows grade Ni 7.98%; 12.75%; 8.94%; 10.85% and recovery Ni 37.46%; 90.52%; 50.43%; 86.85%. The low grade and recovery in the Bahodopi Low Limit sample can be attributed to the initial nickel melted being much lower than the other samples and the appearance of eustantite, clinoesntantite ((Fe,Ni,Mg)2Si2O6), and forsterite (Mg1.7NiO.3O4Si) phases in the slag which can trap nickel and iron so that they remain in the slag.
Co-Authors Annisa Makarim Ibnu Cahyo Nugroho Untung Sukamto