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All Journal Jurnal Rekayasa Material, Manufaktur & Energi Mekanika: Majalah Ilmiah Mekanika Journal of Metallurgical Engineering and Processing Technology Teknika STTKD: : Jurnal Teknik, Elektronik, Engine
Setiawan, Agris
UPN Veteran Yogyakarta
Aerospace Engineering Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Beneficiation of Tailings from Primary Tin Processing from Iron Ore Mines at PT Timah Tbk in PPBT Tanjung Ular Setiawan, Agris; Manalu, Naomi B; Setyani , Atik; Wahyuningsih, Tri; Putri, Adinda; Andreana, Mellyna
Journal of Metallurgical Engineering and Processing Technology Vol 6 No 1 (2025): (August 2025)
Publisher : Universitas Pembangunan Nasional "Veteran" Yogyakarta

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Abstract

The tailings produced from the previous processing are known to still contain valuable minerals such as cassiterite (SnO2), as well as associated minerals such as Fe, ilmenite, and zircon. Therefore, a beneficiation process is needed to optimize tin recovery and minimize the loss of valuable minerals. The beneficiation process includes sampling, sample reduction, grinding using a rod mill, and separation of valuable minerals using a shaking table and wet magnetic separator, as well as X-ray fluorescence (XRF) analysis. The XRF results of primary tin concentrate beneficiation using a shaking table increased the Sn content from 0.736-1.259% to 20-18.99% with a recovery of 1.779-7.456%. Magnetic separation of 40 kg of feed produced magnetic fractions of 5.7 kg and 18 kg, with Fe grades of 8.96–8.99% and Sn up to 4.90%. The grade increase was achieved, but Fe separation was still not optimal because some magnetic minerals were carried over to the non-magnetic fraction.
Analysis Nozzle Temperature Effect in 3D Printer Fused Deposition Modelling (FDM) On Mechanical Properties and Characteristics of Polylactic Acid (PLA) Agris Setiawan; Muhamad Alfa Rizky; Untung Sukamto
Mekanika: Majalah Ilmiah Mekanika Vol 21, No 1 (2022): MEKANIKA: Majalah Ilmiah Mekanika
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/mekanika.v21i1.59221

Abstract

Fused Deposition Modelling (FDM) 3D Printer is a revolutionary technology inAdditive Manufacturing (AM). Polylactic Acid (PLA) is a biodegradable andcompostable polymer formed from the condensation of lactic acid. This experimentalstudy uses a nozzle temperature variation of 210 °C, 220 °C, 230 °C and infill type ishoneycomb pattern which print speed of 3D printer is 80mm/s to print the specimen.The specimen of tensile test was conducted based on American Society for Testing andMaterial (ASTM) standard D638 type 4, while the specimen of flexural test wasconducted based on ASTM standard D790. tensile test, flexural test, andmacrostructural analysis will be carried out to determine the effect of nozzletemperature on the test. Based on the results of the study, it was found that the shrinkageproduced by 3D Print specimens for tensile tests and flexural tests at nozzletemperature 230 °C was very high, namely 2.83% and 4.33%, respectively. nozzletemperature at 230 °C produces a fairly high Ultimate Tensile Strength (σUTS) andFlexural strength (σFS) of 39.60±2.60 MPa and 49.02±0.76 MPa, respectively. Inmacrostructural analysis, the nozzle temperature porosity at 230 °C produces thesmallest porosity of 0.04 mm2 or 1.46%.
Co-Authors Adji Putrawan, Muhammad Rizki Ahmad Salman Taufiqi Firas Alfianur Hakim, Haidar Alfianur Hakim Andreana, Mellyna Aurelo Wimitya Dyah Probowati, Dyah Gracella, Gracella Herodes Eka Putra Tambunan Hoka Padmanaba, Faqih Maharani, Intan Maharani, Monica Manalu, Naomi B Mirahati, Riria Zendy Muhamad Alfa Rizky Pranoto, Aditya Wahyu Putri, Adinda Rizal Riady Akmal Setyani , Atik Tri Wahyuningsih Untung Sukamto Wahyuningsih, Fransisca Diana Yuliana, Margaretha Tri Budi