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All Journal TAMBANG Jurnal Rekayasa Material, Manufaktur & Energi Jurnal Mineral, Energi dan Lingkungan Jurnal Mineral, Energi dan Lingkungan Journal of Metallurgical Engineering and Processing Technology Jurnal Manajemen dan Teknologi Rekayasa Jurnal Teknologi Lingkungan
Yasmina Amalia, Yasmina
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Aerospace Engineering Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Journal : Journal of Metallurgical Engineering and Processing Technology

 1 
Optimization Flotation Process Using Two Types of Collectors at PT. Florrea Indonesia Triandika, Taufan; Sukamto, Untung; Sudaryanto, Sudaryanto; Amalia, Yasmina; Allya Zulfa Suratinoyo, Zahna
Journal of Metallurgical Engineering and Processing Technology Vol 4, No 2 (February 2024)
Publisher : Universitas Pembangunan Nasional "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jmept.v4i2.10897

Abstract

The tailings slurry used in this research originated from company X in Kuala Lipis, Pahang, Malaysia. The primary objective of this study is to determine the percentage of recovery, concentrate content, and Au concentration ratio in the tailings slurry. The research employs a quantitative method involving flotation testing. The flotation process involved two sets of experiments: one without the FX2 collector (tests 1 and 2) and another using both the F7042W and FX2 collectors (tests 3 and 4). dxThe research findings revealed that the percentage of Au recovery in single-collector flotation using FX2 (test 1) was 56.47%, with a concentration ratio of 19.78. In test 2, it was 52.59%, with a mass concentration ratio of 21.57. Meanwhile, the percentage of Au recovery in dual-collector flotation using F7042W and FX2 (test 3) was 68.77%, with a concentration ratio of 16.55, and in test 4, it was 69.45%, with a concentration ratio of 16.93. Based on the results of this research, it can be concluded that the flotation process employing two collectors, namely F7042W and FX2, as investigated in this study, was successful because percent recovery, concentration ratio, and Au content in the concentrate compared to single collector flotation.
Implementation of Metallurgical Industry Management Using the DMAIC Method in TS Aluminum Hafiz Faturrahman, Muhammad; Khayyan Bahiy, Oktavian; Carlotta, Nixon Carlotta; Amalia, Yasmina
Journal of Metallurgical Engineering and Processing Technology Vol 4, No 2 (February 2024)
Publisher : Universitas Pembangunan Nasional "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jmept.v4i2.11432

Abstract

The case study in this research comes from the TS Aluminum company in Yogyakarta. This research aims to reduce the number of defects in metal in the casting process from an industrial management point of view. This research method uses quantitative and qualitative methods through literature studies and experimental data with the DMAIC method.From the results of production and marketing carried out with a production volume of 250 pcs per day, there were 4% failures in the products produced. Defects that often occur are rat tail defects, cold shot, and porosity. Defects are caused by factors such as human error, methodology, and materials. Recommendations for improvement include providing regular training to employees, updating work procedures, and checking materials.
Analysis of Tin Grade and Recovery in Monazite Retreatment with Three Disc Magnetic Separator Adi Putri, Lintang Larasati; Probowati, Dyah; Amalia, Yasmina
Journal of Metallurgical Engineering and Processing Technology Vol 5, No 1 (August 2024)
Publisher : Universitas Pembangunan Nasional "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jmept.v5i1.12900

Abstract

Retreatment is conducted to obtain tin that remains in the monazite tailings (2-3% Sn)  from the processing that has been carried out by PT. Timah. The purpose of this study is to analyse the presence of tin in monazite as well as the effect of magnetic intensity and opening feed on recovery and tin grade by employing a quantitative method of experimentation with three disc magnetic separator. In this study, magnetic intensity was used with disc 1, 2, and 3 respectively is 1.1 T, 1.3 T, 1.5 T (A); 1.3 T, 1.5 T, 1.7 T (B); and 1.5 T, 1.7 T, 1.9 T (C) with opening feed 0.4 cm and 0.8 cm. Based on the experiment, the highest tin grade is 7.33% with the largest combination of magnetic intensity, variation C, and opening feed 0.4 cm. Meanwhile, the highest recovery of 73.64% was obtained at the lowest magnetic intensity, variation A, with the same opening feed. It can be seen that by increasing the magnetic intensity, the tin content will be higher. Meanwhile based on some related experiment, the larger the opening feed, the higher the recovery. However, it should be noted that the opening feed used must not exceed 0.8 cm. If the opening feed used is equal or wider than 0.8 cm, it requires a strong magnetic intensity or the grade and recovery produced will not change significantly.
Research Article Analysis of the Effect of High and Low Calorific Value Coal Utilization on Process Efficiency in the RKEF Process: A Case Study at PT Aneka Tambang Tbk. UBPN Southeast Sulawes Amalia, Yasmina; Alfaro, Anvary
Journal of Metallurgical Engineering and Processing Technology (August 2025)
Publisher : Universitas Pembangunan Nasional "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This study investigates the effect of using High Calorific Value (HCV) and Low Calorific Value (LCV) coal on process efficiency in the Rotary Kiln–Electric Furnace (RKEF) nickel reduction process at PT Aneka Tambang UBPN Southeast Sulawesi. The research was conducted quantitatively through laboratory-scale experiments and operational data analysis. Proximate analysis showed that the volatile matter (VM), fixed carbon (FC), and ash contents significantly influenced the gross calorific value (GCV) of coal. The results indicated that VM had a negative correlation with GCV, FC showed a positive correlation, and ash content exhibited a negative correlation, suggesting that higher FC and lower VM or ash improve coal energy performance. The comparison of HCV and LCV utilization demonstrated that LCV coal mass tends to fluctuate more (1500–3000 kg) compared to HCV coal (500–1500 kg), with total coal consumption ranging between 800–3200 kg. These variations reflect differences in coal quality and thermal efficiency during the RKEF process. Overall, optimizing coal selection based on calorific value and proximate composition is essential to maintain energy balance, improve reduction efficiency, and achieve cost-effective ferronickel production.
Co-Authors Adi Putri, Lintang Larasati Alamsyah, Asfitrah Alfaro, Anvary Allya Zulfa Suratinoyo, Zahna ANDIKA SAPUTRA Carlotta, Nixon Carlotta Dyah Probowati, Dyah Hafiz Faturrahman, Muhammad Hakim, Arief Rakhman Hamdani, M Zulva Karimah, Armitha Lisanul Khayyan Bahiy, Oktavian Mardhatila, Fitri Ayu Mawarda, Mei Iftita Mirahati, Riria Zendy Pauru', Wilson SUDARYANTO SUDARYANTO Suratinoyo, Zahna Allya Zulfa Triandika, Taufan Untung Sukamto, Untung Yanuar Ramadhan