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Yasmina Amalia
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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 129 Documents
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Design Of Lifting Aid Materials To Optimize Waste Loading Into Sealed Containers Supriyadi Junus
Journal of Metallurgical Engineering and Processing Technology Vol 4, No 1 (August 2023)
Publisher : UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jmept.v4i1.10185

Abstract

Waste management in a field from 2016 to 2017 carried out using closed containers can only load 10 Jumbo Bags with an average weight of 6.74 tons per container. While the waste management cost component, 51.7% is influenced by the cost of transportation through containers. The problem of loading waste during handling is greatly influenced by the lifting aids used for loading so that it can maximize the loading of waste into closed containers which are transportation tools used to transport waste. This study will focus on designing lifting aid materials for loading waste into sealed containers.. The material used is 6" sch 40 pipe and 3“sch 40 pipe. The design was first simulated using stress analysis software to determine the threshold of yield strength of the material used. After production of the lifting aid, the welded joints was tested with magnetic testing which shows no defect.. The lifting aid is able to optimize the loading of waste as much as 1968 tons using 130 containers where each container contains 15 jumbo bags and weighs 15.14 tons. This can reduce the number of containers that are a major cost component in transporting waste.
Magnetic Flux Leakage for Tank Inspection 2F-4905 Rangga Buana
Journal of Metallurgical Engineering and Processing Technology Vol 4, No 1 (August 2023)
Publisher : UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jmept.v4i1.8668

Abstract

In the world of metal and non-metal industries, materials are a common thing. However, to get a quality material, a test needs to be done. One of them is the Magnetic Flux Leakage (MFL) method which is widely used for Non-Destructive Test (NDT). NDT is one of the activities to test the properties of metals which is often known as physical metallurgy. In this study, it was carried out to detect defects or corrosion in the bottom of storage tank 2F-4905 at PT Mitsubishi Chemical Indonesia by applying API 650 Standard. This is done as a form of occupational health and safety program to ensure there is no potential damage that can cause leaks in the future. The results obtained from the inspection found no irregularities or defects in the test results that did not meet the acceptance criteria set by PT MCCI based on the standard for storage tanks, namely API 650.
Experimental Analysis of Magnetic Particle Inspection on S355J2 Steel Weld Joints Muhammad Avicena Apriliansyah
Journal of Metallurgical Engineering and Processing Technology Vol 4, No 1 (August 2023)
Publisher : UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jmept.v4i1.7813

Abstract

NDT (Non-Destructive Test) is a form of testing carried out on materials or objects without causing permanent damage to these materials or objects. This study aims to determine the NDT Magnetic Particle Inspection testing process that is carried out and find out the results of the inspection of S355 J2 steel specimens with the NDT Magnetic Particle Inspection test method as the basis for determining the GMAW Welder Qualification. Welding of S355 J2 Steel is performed by a certified welder using GMAW welding using a single V-butt joint at an angle of 30 degrees. NDT Visual Test and Magnetic Particle Inspection are carried out during material testing. Data & output shows welder PT. INKA qualified with the standards set by the company, namely AWS D1.1 and ASTME E 709. So the Welder can be allowed to work on a Project because it is considered to have met the required Welder qualification standards.
Metal Failure Analysis and Maintenance Planning on Gasoline Storage Tank Pipe PT Pertamina Refinery Unit VI Asfitrah Alamsyah
Journal of Metallurgical Engineering and Processing Technology Vol 4, No 1 (August 2023)
Publisher : UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jmept.v4i1.9134

Abstract

Inspection and corrosion controlling is essential to avoid work accidents and losses to the company. In this study, the authors conducted a case study with PT Pertamina Refinery Unit VI Balongan, which processes crude oil into fuel, non-fuel, and petrochemical products. Material failure analysis was carried out by inspecting the pipes of the gasoline storage tank, which indicated corrosion. Tests were carried out by analyzing pipe thickness, water impurities, XRD, and SEM-EDX. The test results showed pipe thinning from 24 to 20 inches. Corrosion in gas storage tank pipes is caused by iron oxide, the main product of corrosion, and chlorine as a catalyst that accelerates corrosion. In addition, the SEM test shows a flowery structure, indicating surface defects. Apart from that, XRD testing on the deposits that cover the pipes shows the presence of goethite, hematite, and magnetite, which are oxidation products of iron or carbon steel. Controlling chlorine levels and using inhibitors can be one way to manage corrosion in pipes.
Implementation of Sodium Hydrosulfate (NaHS) Flotation with F83 and F515 on Mass Recovery of Gold Ore Lintang Larasati Adi Putri
Journal of Metallurgical Engineering and Processing Technology Vol 4, No 1 (August 2023)
Publisher : UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jmept.v4i1.9338

Abstract

There exist more and more gold mines in Indonesia, especially those that have just been started. It is indispensable to do test work to decide the process flow that will be utilized. Reagent usage tests on the flotation of gold ore were carried out to determine the mass recovery obtained by using a specific reagent and to determine which reagent is more optimal and profitable for further test work. Flotation is carried out using mechanical flotation with F83 and F515 as collector and frother respectively along with the addition of NaHS as modifier or sulfidization reagent.. Based on the flotation that has been conducted, it is known that the use of NaHS enhances the mass recovery obtained. Moreover, compared to the usage of other reagents, flotation with NaHS gives a slightly larger mass recovery with an increase around 2-3%. This indicates that the gold ore used is ores that have been oxidized More in-depth test work is required to get the optimal dose to obtain considerable mass recovery.
Analysis of Penetrant Test Results of S355J2 Steel Welding Connections for Qualification Welding Irsyadi Farhan Efriandi
Journal of Metallurgical Engineering and Processing Technology Vol 4, No 1 (August 2023)
Publisher : UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jmept.v4i1.7869

Abstract

NDT (Non Destructive Test) is a form of testing perfomed on materials or objects without causing permanent damage to the material or objects. NDT can be used for testing materials such as concrete, steel, iron, and other. This journal aims to determine the Penetrant Test testing process on S355J2 steel welding results to determine the qualifications of GMAW Welders. Welding testing by a certified welder using GMAW welding. NDT testing was conducted in the form of a visual test and a Penetrant test when testing the weld results. The obtained data showed the welder PT. INKA is qualified with the terms and standards that have been set by the company, namely AWS D1.1 and ASTME E 165. Therefore, the Welder can be involved in the current project.
Experimental Study on the Corrosion Rate Influence Caused by Seawater on Aircraft Structures Marga Dharma Prayoga; Heru Susanto; Muhammad Luqman Bukhori
Journal of Metallurgical Engineering and Processing Technology Vol 4, No 1 (August 2023)
Publisher : UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jmept.v4i1.7560

Abstract

Airplanes are a very fast and time efficient means of transportation. In Indonesia itself, because the country is an archipelago and has a tropical climate, rainwater and seawater are the main problems in the aviation world, this is evidenced by the corrosion that occurs in every aircraft maintenance. Factors that cause corrosion and corrosion rate are acidity, environmental conditions, and materials used. The material that is often used in aircraft is 2024 T-3 aluminum material which is strong, lightweight, and also resistant to corrosion, but because 2024 T-3 aluminum has several mixtures of other materials such as iron, copper, and copper,other materials, then aluminum can also be exposed to corrosion and corrosion rates. Corrosion and corrosion rate can be determined using the weight loss method which is used to measure the rate of corrosion that occurs, it is proven in 72 hours the material has experienced a corrosion rate of 0.002 mpy and the corrosion rate continues to increase every day, and to see the corrosion that occurs on the material used micro photos to see the type of corrosion. But the weight loss method is not very accurate because the weight loss that occurs from the material is the result of abrasion when sanded. In addition, seawater is the biggest influence on the corrosion rate problem when compared to rainwater.
Effect of Application Rate on Gold Ore Extraction Process with Column Test Method at PT J Resources Bolaang Mongondow, North Sulawesi Frederico Espinoza Rangan; Sudaryanto Sudaryanto
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.v5i1.12385

Abstract

PT J Resouces Bolaang Mongondow is engaged in gold processing with the heap leach process using the dynamic cell method. However, currently there will be a change to the static cell method so that it will affect the operational strategy including the application rate. Therefore, in this research, testwork was carried out to determine the best application rate to be used in the static cell process, studying the effect of application rate on leaching kinetics, percent gold extraction value, and cyanide consumption. The research stages include preparation and testing of head assay samples, leaching, and preparation and testing of tailings samples using the column test method. The application rate variations used were 20 L/m2 /h, a combination of 20 & 10 L/m2 /h, and 10 L/m2 /h. Pregnant leach solution obtained per day is checked for pH, free cyanide, and metal content analysis for the calculation of the percent extraction by back calculated. The results showed that the application rate of 20 L/m2 /h and the combination of 20 & 10 L/m2 /h had faster primary leaching kinetics than the application rate of 10 L/m2 /h. Analysis of the percent extraction of application rate 10 L/m2 /h has the highest percent extraction of 89% (0.2081 mg/L gold). Application rate also has an impact on cyanide consumption, where the application rate of 20 L/m2 /h has the highest cyanide consumption of 0.13 g/t. Meanwhile, the application rate combination of 20 & 10 L/m2 /h and 10 L/m2 /h had cyanide consumption of 0.081 g/t and 0.067 g/t, respectively. From the results, it is concluded that the best application rate is the combination of 20 & 10 L/m2 /h, judging from the leaching kinetics factor and the percent extraction obtained. On the other hand, the volume of solution produced is also less so that it can minimize the occurrence of landslides on the leach pad
Analysis Of Tensile Strenghth Coconut Coir Fiber Composit Using The Vaccum Bagging Method Zaqi Arya Zullfawas Ilhami; Ferry Setiawan; Sehono Sehono
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.v5i1.10524

Abstract

Abstract The utilization of coconut fiber currently is limited to making brooms or for burning, necessitating further applications. One of these applications is its use as a reinforcement in composites, enhancing utility value and environmental friendliness. This study focuses on crafting composites from coconut fiber with variations in fiber orientation: random, 0°, and 45°.Tensile testing results reveal that the random fiber orientation variation exhibits the best performance, with a stress of 27.30 MPa, attributed to higher density. The 45° fiber orientation variation has the lowest stress (24.23 MPa) due to a lower fiber count. In bending tests, the random fiber orientation variation again performs the best, with a bending stress of 120 MPa, attributed to its high density that strengthens the structure. The 0° fiber orientation has the lowest bending stress (88.59 MPa) due to lower fiber density.Overall, utilizing coconut fiber as reinforcement in composites shows promising positive outcomes, with the random fiber orientation variation providing the best mechanical performance. This endeavor holds the potential to enhance the economic and ecological value of coconut fiber.Keywords: Composite, fiber, coconut, tensile, bending
Gold Extraction Process with Pre-Ox Sample and Aachen Assisted Leaching (AAL) using Running Aachen Dedi Pangestu; Tri Wahyuningsih
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.v4i2.11252

Abstract

The Center for Mineral and Coal Testing is an institution that works in the field of research services on mining and mineral processing. In the mineral processing research currently being carried out there is a research project related to increasing the efficiency of the leaching process using the Aachen Reactor. The samples used in this research were refractory gold samples. The problem of reducing the effectiveness of gold leaching is that there are minerals that are still included in the associated minerals, therefore a pre-treatment process is needed to remove these associated minerals. The Aachen reactor will help increase the efficiency of the leaching process by increasing Dissolve Oxygen levels to 30 ppm. In this study, two samples were used for comparison, namely the Pre-Ox sample and the Aachen Assisted Leaching (AAL) sample.

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