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Yasmina Amalia
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INDONESIA
Journal of Metallurgical Engineering and Processing Technology
Published by Universitas Pembangunan Nasional Veteran Yogyakarta
ISSN : 27236854     EISSN : 27981037     DOI : https://doi.org/10.31315/jmept
Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Energy Engineering Materials Science & Nanotechnology Mechanical Engineering
Journal of Metallurgical Engineering and Processing Technology diterbitkan oleh Program Studi Teknik Metalurgi, Fakultas Teknologi Mineral, Universitas Pembangunan Nasional "Veteran" Yogyakarta. Journal of Metallurgical Engineering and Processing Technology terbit dua kali dalam satu tahun, yaitu Februari dan Agustus. Fokus dan ruang lingkup Journal of Metallurgical Engineering and Processing Technology adalah Pengolahan Mineral, Batubara, Metalurgi Ekstrasi, Metalurgi Fisika, Metalurgi Mekanik, dan Pengelolaan Mineral
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 4 Documents
 1 
Search results for , issue "Vol 5, No 2 (February 2025)" : 4 Documents clear
Renewable Energy Revolution: A Review Of Innovative Strategies Towards Net Zero Emission (NZE) Naibaho, Nathan Gorga Tona; Setyani, Atik; Pratomo, Dias Dibyo
Journal of Metallurgical Engineering and Processing Technology Vol 5, No 2 (February 2025)
Publisher : Universitas Pembangunan Nasional "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jmept.v5i2.14023

Abstract

The Net Zero Emissions (NZE) program became a common term after the 2015 Paris Climate Agreement. This program aims to reduce environmental pollution that can cause global warming. Energy is one of the sectors that is the focus of the NZE program implementation efforts. The energy transition is a very important program, especially in relation to the NZE Program issue and mitigation of the Greenhouse Gas effect. The energy transition program must focus on reducing carbon intensity and providing more benefits to all households. Indonesia has committed to achieving NZE by 2060 or sooner. This study aims to examine the role of renewable energy in achieving the NZE program and analyze innovation strategies to accelerate the NZE program. This study uses a narrative literature review method to analyze information and literature. This study presents alternative solutions to the issue of renewable energy transition in realizing NZE. Utilization of abundant renewable energy to replace fossil fuels and also electrification of non-electricity sectors can be a priority solution in realizing NZE. In addition, the development of Carbon Capture, Utilization, Storage (CCUS), and Green Hydrogen technology is also very important for the industrial sector in mitigating the effects of greenhouse gases.
Study of Coal Ash Content Separation in Mallawa Area using The Dense Medium Separation Method Arifin, Mubdiana; Bakri, Suriyanto; Juradi, Muhammad Idris; Nurhawaisyah, Sitti Ratmi; Zulkarnaen, Dina
Journal of Metallurgical Engineering and Processing Technology Vol 5, No 2 (February 2025)
Publisher : Universitas Pembangunan Nasional "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jmept.v5i2.14029

Abstract

Coal remains a major energy source globally, particularly for power generation and industries like iron, steel, chemicals, and cement. Indonesia's coal reserves are widespread, spanning regions such as Aceh, South Sumatra, East Kalimantan, and South Kalimantan. The Mallawa Formation in South Sulawesi also has coal, but it is of low quality due to high ash content, which lowers the calorific value and increases environmental pollution. Therefore, beneficiation is necessary to reduce ash content. The Dense Medium Separation method effectively separates coal from impurity minerals based on density. This study aims to evaluate ash reduction and separation yield across various coal fraction sizes. The coal washing process was conducted on fractions -60+80, -80+100, -100+150, and -150+200 mesh, using a perchloroethylene solution with a density of 1.6 g/ml as the separation medium. Initial coal sample analyses included proximate, calorific value, total sulfur, and mineral matter. Results showed Mallawa coal has 2.94% moisture, 40.60% volatile matter, 47.39% fixed carbon, 9.07% ash, 2.41% total sulfur, and 7053 kcal/kg calorific value, containing quartz, pyrite, calcite, and chlorite minerals. The DMS process on the -150+200 mesh fraction gave the best outcomes, with 50.39% ash elimination and 30.7% yield, making it the optimum size for ash separation in Mallawa coal.
The Study of Sintering Process in Metal Forming Setiawan, Agris; Pranoto, Aditya Wahyu; Adji Putrawan, Muhammad Rizki; Maharani, Monica
Journal of Metallurgical Engineering and Processing Technology Vol 5, No 2 (February 2025)
Publisher : Universitas Pembangunan Nasional "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jmept.v5i2.14201

Abstract

Powder metallurgy is a technique used to produce metal components through the process of compacting and sintering metal powders. The sintering process involves heating the powder below its melting point, which allows the metal particles to bond together through a diffusion mechanism. This study examines the sintering mechanism, the factors that influence it, and the mechanical properties of the resulting materials. The research methods include a literature review and a literature study to collect information related to the sintering process of powder metal such as Al, Mg, Ti, Cu, Ni and Fe. The results show that sintering temperature and holding time of MMCs,AMCs have a significant effect on particle size that increase mechanical properties such as compressive strength, tensile strength, elastic modulus and density. Thus, a deeper understanding of the sintering process can improve the quality of metal products produced from powder metallurgy. 
Study of the Effect of Penetrant Temperature Variations on Corrosion Sensitivity of 7075 Alumnium material using the Liquid Penetrant Test Method at PT. Dirgantara Indonesia (IAe) Yudhistira, Prayogi; Prabowo, Imam; Yunardi, Yongki
Journal of Metallurgical Engineering and Processing Technology Vol 5, No 2 (February 2025)
Publisher : Universitas Pembangunan Nasional "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jmept.v5i2.14293

Abstract

Non Destructive Test is a testing and analysis method carried out to evaluate and detect differences in characteristics or defects that arise in materials, components, structures or systems without causing damage to the part being tested. Liquid Penetrant Test is a Non-Destructive Test method using Liquid Penetrant containing Fluorescent by utilizing power capillarity which is the ability of the penetrant liquid to enter the gap discontinuity and developer work to lift the liquid back up which penetrates into cracks so that defects and corrosion can be detected. The purpose of this test is to determine discontinuities in the fabricated material by using 3 variations of penetrant temperature 5℃, 10℃ - 38℃, and 75℃ using 2 pieces of 7075 Aluminum material. Experiments carried out at normal temperatures (10℃-38℃) show clear indications of the material. while experiments using temperatures of 5℃ and 75℃ will make the indication on the material unclear (false indication) due to various factors such as viscosity, dwell time, penetration, developing. 

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