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All Journal JURNAL KIMIA SAINS DAN APLIKASI Jurnal Pendidikan Teknologi dan Kejuruan Jurnal Sains Materi Indonesia Agrointek Teknika: Jurnal Sains dan Teknologi ROTOR: JURNAL ILMIAH TEKNIK MESIN Eksplorium : Buletin Pusat Pengembangan Bahan Galian Nuklir Jurnal METTEK (Jurnal Ilmiah Nasional Dalam Bidang Ilmu Teknik Mesin) Journal Of Chemical Process Engineering (JCPE) INVOTEK: Jurnal Inovasi Vokasional dan Teknologi Jurnal Rekayasa Material, Manufaktur & Energi Metalurgi Teknomekanik Journal of Materials Exploration and Findings Metalurgi Recent in Engineering Science and Technology Eksplorium : Buletin Pusat Pengembangan Bahan Galian Nuklir

Johny Wahyuadi Soedarsono

Departemen Teknik Metalurgi Dan Material, Fakultas Teknik, Universitas Indonesia, Depok 16424

Author-ID : 5301359

Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences Transportation

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Ekstraksi Litium dari β – Spodumen Hasil Dekomposisi Batuan Sekismika Indonesia Menggunakan Aditif Natrium Sulfat [Lithium Extraction from β-Spodumene the Decomposition Product of Schist Mica Indonesia Using Sodium Sulphate as Additive] Nadia Chrisayu Natasha; Latifa Hanum Lalasari; Miftakhur Rohmah; Johny Wahyuadi Sudarsono
Metalurgi Vol 33, No 2 (2018): Metalurgi Vol. 33 No. 2 Agustus 2018
Publisher : National Research and Innovation Agency (BRIN)

Spodumene is one of minerals that present in hard rock as lithium resources. Mineral for lithium resources in nature is α-phase spodumene. Requirement of lithium extraction from spodumene by leaching is the presence of β-form phase in ore because it has a porosity that makes it more reactive than α-form. Formation of β-phase spodumene was obtained from schist mica Kebumen, Center Java, Indonesia by roasting method using sodium sulfate at 650, 700, 750 and 800 oC for 20, 40 and 60 minutes. Leaching was done to determine the phase effect on lithium extraction percentage. The variations of solid and liquid ratio on this leaching are 1 : 15, 1 : 10, 1 : 5, 1 : 2 and 1 : 1 (g/mL). Leaching was done using aquadest for 1 h. STA (simultaneous thermal analysis) was used to determine reaction temperature between schist mica and sodium sulfate by thermal treatment. XRD (x-ray diffraction) and SEM (scanning electron microscopy) were used to examine the presence of spodumene phase, morphology and particle size. While the composition of schist mica was determined by ICP (inductively coupled plasma). In schist mica from Kebumen, Center Java, Indonesia indicates that spodumene exist in it. β-phase spodumene started to form at 700 oC for 20 minutes and it phase changed at 750 oC for 40 minutes become sanidine (AlLiO8Si3). Optimum value of extraction percentage from this investigation is 70.6% at 700 oC for 40 minutes. AbstrakSpodumen merupakan salah satu mineral yang terkandung di dalam batuan sebagai sumber litium. Mineral bahan baku litium ditemukan di alam dalam bentuk α – spodumen. Syarat utama dalam melakukan ekstraksi litium dari spodumen dengan metode leaching adalah fasa β – spodumen. Hal tersebut dapat terjadi karena fasa tersebut mempunyai poros yang membuatnya menjadi lebih reaktif jika dibandingkan dengan fasa α – spodumen. Pembentukan fasa β – spodumen diperoleh dari batuan sekismika Indonesia dengan metode roasting menggunakan natrium sulfat sebagai aditif pada 650, 700, 750 dan 850 ºC selama 20, 40 dan 60 menit. Proses leaching dilakukan untuk mengetahui pengaruh fasa yang terbentuk terhadap persen ekstraksi litium. Variasi perbandingan solid dan liquid pada proses leaching yaitu 1 : 15, 1 : 10, 1 : 5, 1 : 2 dan 1 : 1. Proses leaching dilakukan menggunakan aquadest selama 1 jam pada temperatur kamar. Analisis Simultaneous Thermal Analysis (STA) digunakan untuk menentukan temperatur reaksi antara sekismika dan natrium sulfat pada saat proses roasting. Analisis X – ray diffraction (XRD) dan Scanning Electron Microscope (SEM) dilakukan untuk analisis secara fisik dalam mengetahui perubahan fasa yang terbentuk, morfologi dan mapping. Sedangkan komposisi dari sekismika ditentukan dengan Inductively Coupled Plasma (ICP). Di dalam batuan sekismika, Kebumen Indonesia mengindikasikan adanya kandungan mineral spodumen. Fasa β – spodumen mulai terbentuk pada temperatur 700 ºC dan waktu roasting 20 menit namun fasa tersebut berubah pada 750 ºC dan waktu roasting 40 menit menjadi sanidine (AlLiO8Si3). Persen ekstraksi optimum litium yang diperoleh adalah 70,6% pada 700 ºC dan waktu roasting 40 menit.

PENGKAYAAN UNSUR YTTRIUM DAN CERIUM PADA TERAK TIMAH BANGKA: ANALISIS TERMODINAMIKA Sulaksana Permana; Debby Rachel; Agus Budi Prasetyo; Rafdi Abdul Majid; Wahyu Kartika; Iwan Susanto; Johny Wahyuadi M
Metalurgi Vol 35, No 2 (2020): Metalurgi Vol. 35 No. 2 Agustus 2020
Publisher : National Research and Innovation Agency (BRIN)

Beberapa negara melakukan penelitian untuk mendapatkan sumber unsur tanah jarang (UTJ) dikarenakan dominasi suplai UTJ oleh negara China. Beberapa penelitian sebelumnya menunjukkan adanya sumber UTJ dari proses penambangan dan pemurnian timah di kepulauan Bangka Belitung. Pada penelitian ini terak timah Bangka (TTB) dilakukan serangkaian kondisi proses untuk mendapatkan hasil pengkayaan yttrium dan cerium yang optimal. Proses yang dilakukan adalah dengan melakukan pemanggangan TTB pada suhu 900⁰C, pelindian dengan NaOH, pelindian dengan HNO3 dan terakhir pelindian dengan H3PO4 dengan variasi konsentrasi. Hasil yang didapatkan adalah kadar optimal cerium 4,39 % setelah kondisi proses pelindian NaOH dan kadar yttrium mengalami peningkatan terus pada seluruh kondisi proses serta didapatkan kadar optimal 1,35 % setelah dilakukan pelindian dengan HNO3 2M dan H3PO4 1,5 M.

STRUCTURAL RISK-BASED UNDERWATER INSPECTION (RBUI) AS A COST REDUCTION OF FIELD’s END OF PRODUCTION LIFE Putra, Ivan Fitrian; Soedarsono, Johny Wahyuadi; Mahendra, Mirza; Haidir, Yuki; Purnawarman, Faisal Dwiyana; Sukirna, Iwan; Hernowo, Widi
Journal of Materials Exploration and Findings Vol. 1, No. 2
Publisher : UI Scholars Hub

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

Mubadala Petroleum operates offshore platforms in a southern Makassar Straits that needs to be periodically inspected. The cost for the inspection is massive due to the high cost of mobilization and demobilization of vessels including crew and equipment. In response of a new approach to reduce cost, a Risk-Based Underwater Inspection (RBUI) methodology is developed. This RBUI purpose is to reduce the inspection interval of the offshore platform, from every 2 years to a longer period[1]. There are existing RBUI methodologies, which are already developed and implemented in other companies[5]. Purpose of this paper is to develop further detailed and more accurate RBUI methodology based on data analysis and the agile development method. Offshore platforms condition is dynamic and always changing from time to time. This methodology uses offshore platform design and condition data, including inspection data. All collected inspection data of offshore platform conditions will produce an accurate risk register of the platform. Thus, accurate risk register will give the best inspection interval time, considering its safety and economical benefit. From the RBUI analysis using this method, inspection interval can be deferred from 2 (two) years to range of 4-9 years, depending on the condition and risk of the platform. The operating cost of each platform also reduced up to US$ 670,737 per year.

Structural Integrity Analysis of the Rig Mast Following Repair of Two Diagonal Braces in the Upper Mast Section Padmodwiputra, Rendhatya; Soedarsono, Johny Wahyuadi; Mahendra, Mirza; Satria, Bambang Eka; Arif, Chandra; Suarthana, Eka Juni
Journal of Materials Exploration and Findings Vol. 1, No. 3
Publisher : UI Scholars Hub

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During a move to the new drilling location, two braces of the upper mast section on a 550 HP oil and gas rig was damaged. When damage is discovered, the rig operating company should conduct a risk analysis related to the damage using the standard used to determine rejection criteria and follow-up repairs. The strength of the rig mast is calculated using Finite Element Analysis (FEA) with initial conditions (before damage occurs) where all braces are installed and extreme conditions where neither brace is repaired. The calculation results are then used to assess the risk of reducing the rig mast strength. The results of the integrity analysis will show FEA of rig mast and the distribution pattern of stress ratio values, which is the ratio between the stress that arises and the allowable stress of the material on the mast parts due to loading.

Performance Comparison Of Self Aeration Flotation Machine Vs Induced Air Flotation Machine With The Additional Effect Of Variation Of SiBX Dosage On % Recovery of Cu and Au At North Concentrator PT. X Papua Putra, Budhi; M. Soedarsono, Johny Wahyuadi; Ariyani, Ira
Rekayasa Material, Manufaktur dan Energi Vol 7, No 1: Januari 2024
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v7i1.16941

Comparison of the performance of self aerating vs induced water flotation machines with the effect of adding SiBX dose variations on % recovery of Cu and Au, so that it can be carried out to optimize the recovery process of Cu and Au at PT. X Papua. It was carried out at the Cl concentrator plant scale, using three types of SiBX dosage variations, namely 5 g/t, 10 g/t, and 15 g/t which were applied to both types of flotation machines. Furthermore, mineral assay and XRD tests were carried out. The results of % recovery of Cu and Au as a whole show that the self aerating flotation machine is able to remove Cu and Au more effectively than the water induced flotation machine for all coarse, medium, and fine mineral size fractions. Recovery of Cu and Au is influenced by the hydrodynamic properties of the two types of engines. The effect of adding variations in SiBX doses was less significant on % recovery of Cu and Au.

Studi Pengaruh Titik Penambahan Sodium Isobutyl Xanthate (SIBX) dan Kecepatan Impeller pada Performa Flotasi Mineral Tembaga Oktikawati, Anjar; Nugraha, Cahyo Ady; Soedarsono, Johny Wahyuadi
Rekayasa Material, Manufaktur dan Energi Vol 6, No 1: Maret 2023
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v6i1.12650

Evaluation of the use of the SIBX addition point and energy consumption in a flotation machine is an optimization effort to increase recovery in a valuable mineral separation process. The purpose of this study was to maximize the use of reagents and energy consumption in flotation machines by looking for the effect of the SIBX addition point and impeller speed variations on copper recovery. In the experiments, the authors vary the impeller speed and the SIBX addition points. The impeller speed is varied into five different speeds. While the SIBX addition point into four different points. From the variation of the experiment, the test must be done within 20 flotation kinetics. Those tests were performed for 8 minutes and will generate 4 concentrates and tailings. From this information, a graph of the relationship between recovery and time is obtained, and it can be seen that the point of adding SIBX and impeller speed is to produce optimal recovery values. From the available tailings and feed, an analysis of particle size and distribution is also carried out to check the effectiveness of changing the impeller speed pattern to provide kinetic energy for particles of various sizes to collide with air bubbles and increase the probability of collection of valuable minerals, so that high recovery is obtained in various areas. particle size. Of all the speed variations used in the impeller, the best kinetic recovery comes from the addition of SBX in the 0 min, 2 min, and 4 min. While the worst comes from the addition in the 6 min. Copper kinetic recovery is only affected by the nature and amount of hydrophobic particles but is not affected by impeller speed. Copper recovery at each end of the experiment showed the same value which is an average of about 94%.

Study of mixing purple sweet potato and turmeric extract as green corrosion inhibitor for API-5L in NaCl 3.5% environment Wijaya, Arie; Soedarsono, Johny Wahyuadi; Laksana, Aldi Putra
Jurnal Pendidikan Teknologi Kejuruan Vol 4 No 4 (2021): Regular Issue
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jptk.v4i4.21823

Green inhibitors have become a major option for corrosion prevention since people are more aware of environmental damage. It is true that chemical inhibitors are more powerful at preventing corrosion, but its side effects are very harmful to the environment. Purple sweet potato (Ipomoea batatas L) in single use has been proven as an active inhibitor for certain applications. To improve this property, purple sweet potato is used as a mixed with other plants that contain antioxidant agents, such as ginger, melinjo, turmeric, jeera, etc. This paper discussed the effect of applying mixed extract of purple sweet potato with turmeric (Curcuma longa) as a green inhibitor to corrosion rate of API 5L steel in a 3.5% NaCl environment. Turmeric extract contains curcumin and kaempferol antioxidants while purple sweet potato extract contains antocyanin antioxidants. Corrosion rates were analyzed based on weight loss and polarization methods. The results showed the highest inhibitor efficiency was 82.54% achieved by 16 ml of turmeric mixed with 2 ml of purple sweet potato, and the optimum inhibitor efficiency was 74.2% achieved by 8 ml of turmeric mixed with 6 ml of purple sweet potato.

Influence of Electrolyte Molarity and Applied Voltage on the Purification of Ferronickel by Electrolysis Method Astini, Vita; Meirawati, Selvia; Nengsih, Sulistia; -, Arif; -, Hasriyanti; Soedarsono, Johny Wahyuadi Mudaryoto; Zulfia, Anne
Metalurgi Vol 39, No 1 (2024): Metalurgi Vol. 39 No. 1 2024
Publisher : National Research and Innovation Agency (BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/metalurgi.2024.742

The current advancements in the automotive industry highlight the critical need for electric vehicles, which require a reliable supply of nickel for battery production. A potential nickel source is Ferronickel's local content, which can be used as a secondary resource. However, research on converting smelted Ferronickel into electrolytic nickel is still limited. This study aims to examine the effects of electrolyte molarity and applied voltage during the electrolysis process for refining Ferronickel. The molarities of HCl employed in this research are 0.1, 0.25, 0.5, 0.75, and 1 M for 2 hours. Additionally, the molarities of HCl are set at 2, 3, and 4 M for 6 hours. Further experiments were performed using varying voltages of 1, 2, 4, 6, and 8 V while keeping the solution concentration constant at 1 M and maintaining an electrolysis duration of 2 hours. The electrolysis solution was subsequently analyzed using the AAS (atomic absorption spectrophotometry) test. The results indicated that higher molarity levels were associated with increased current, resulting in faster reaction rates and greater solubilization of nickel metal. The Ni concentration rose with higher molarity, increasing from 76.50 mg/L in .25 M HCl to 91.88 mg/L in 1 M HCl. In contrast, the Fe concentration remained nearly constant across various molarity levels, ranging from 11.81 mg/L in .25 M HCl to 11.95 mg/L in 1 M HCl, suggesting a minimal influence of molarity below 1 M. Fe exhibited a strong positive correlation with increasing electrolyte molarity, showing a significant rise in concentration from 49.06 g/L at 2 M to 90.17 g/L at 4 M. Ni showed a more modest response to elevated molarity, with concentrations increasing from 11.95 g/L at 2 M to 22.70 g/L at 4 M. The Ni concentration increased with the applied voltage up to 6 V, reaching 95.57 mg/L, but then decreased to 77.67 mg/L at 8 V, indicating that the optimum voltage is 6 V. The Fe concentration displayed slight fluctuations but remained relatively stable across different voltage levels, measuring 11.81 mg/L at 1 V and 12.28 mg/L at 8 V, indicating that the applied voltage does not significantly influence Fe concentration in the solution.

Quantitative Risk-Based Inspection on Gas Riser Pipelines at Offshore Facilities Asfar, Mhd. Ibkar Yusran; Soedarsono, Johny Wahyuadi; Wijaya, Arie; Aditiyawarman, Taufik; Soelistiyono, Dony; Ramadhan, Romal
Teknomekanik Vol. 4 No. 2 (2021): Regular Issue
Publisher : Universitas Negeri Padang

Numerous pipeline failures have occurred due to the drastic increase in oil and gas product distribution pipelines over the last three decades. Corrosion is a significant factor in the failure of offshore gas pipelines. It is necessary to maintain the integrity of the offshore transmission system, one of which is the riser, for the product to be adequately distributed. The purpose of this study is to ensure the riser's reliability by conducting a risk assessment of the probability and consequences of equipment failure, mitigating the impact of failure risk, and developing a more optimal inspection plan. The API 5L Grade X60 gas riser pipe is the subject of this study. The quantitative Risk-Based Inspection (RBI) technique was used in 2016 following the API 581 standard. This quantitative approach is founded on a numerical value model constructed using validated operational data and inspection results. The risk assessment indicates that the gas riser pipelines will have a high-risk level (5D) for the splash zone segment and a medium-risk level (2D) for the above-and below-water segments. The recommended inspection plan for the gas riser pipeline is one year after the risk-based inspection assessment.

Material selection for raw gas pipeline at SBR#2 gas field Riady, Rado; Soedarsono, Johny Wahyuadi; Riastuti, Rini; Adipurnama, Iman
Teknomekanik Vol. 5 No. 2 (2022): Regular Issue
Publisher : Universitas Negeri Padang

In engineering design, material selection is the process of choosing the best material for a specific process via a systematic material selection approach. This article described the material selection process for SBR#2 pipeline, which will be installed to flow raw gas from SBR#2 field to the nearest tie-in point. The material selection process starts with design requirement analysis to generate primary function and objectives, including its constraints, determine primary criteria to be evaluated, screen materials candidates based on criteria evaluation, and select the most suitable materials based on very specific requirements. The criteria were evaluated by performing value engineering with the performance criteria matrix tool. Materials selection, in this case, was determined by two main criteria: corrosion resistance and construction ability. Corrosion resistance was evaluated semi-quantitatively by applying NORSOK M-506 2005 spreadsheet, and construction ability were evaluated qualitatively based on field experience. Solid Corrosion Resistance Alloy (CRA)-Stainless Steel 316L pipe is the most suitable for this case.

Co-Authors Adelia, Ni Luh Triska Adipurnama, Iman Aditiyawarman, Taufik Agus Budi Prasetyo Agus Budi Prasetyo Ahmad Maksum Andon Insani Angga Pratama Putra, Angga Pratama Anjar Oktikawati Anne Zulfia Aprizal Aprizal Arif Arif Arif, Chandra Ariyani, Ira Ariyo Suharyanto Arya Parande, Egidius Asfar, Mhd. Ibkar Yusran Astini, Vita Avifa, Venny Nur Azizah Intan Pangesty Badrul Munir, Badrul Bambang Suharno Budi Prasetyo, Agus Darnengsih, Darnengsih Debby Rachel Eddy S Siradj Eni Febriana Eriyatno . Ersina Rakhma Fachry Abda El Rahman Florentinus Firdiyono Hadi Suwarno Haekal, Teuku Ahmad Haidir, Yuki Hasriyanti Hasriyanti Hendrastuti Hendrastuti Hernowo, Widi Indah Ciptasari, Nurhayati Isnanda Nuriskasari Iwan Susanto Januar Irawan Kautsar Muwahhid Kautsar Muwahhid Kezia Kurnia Trinopiawan Kurnia Trinopiawan Laksana, Aldi Putra Lalasari, Latifa Hanum Latifa Hanum Lalasari Latifa Hanum Lalasari Mahendra, Mirza Meika Syahbana Rusli Meirawati, Selvia Mhd. Ibkar Yusran Asfar Miftahul Ulum, Reza Miftakhur Rohmah Miftakhur Rohmah, Miftakhur Munira Munira Mustafiah Mustafiah Nadia Chrisayu Natasha Natasha, Nadia Chrisayu Nengsih, Sulistia Ni Luh, Triska Adelia Nugraha, Cahyo Ady Nugroho, Firman A. Padmodwiputra, Rendhatya Permana, Sulaksana Pertama, Tio Angger Pramono, Khalisha Rizqi Olga Purnawarman, Faisal Dwiyana Putra, Budhi Putra, Ivan Fitrian Rafdi Abdul Majid Rafdi Abdul Majid Rahmaulita, Giafin Bibsy Rakhma, Ersina Ramadhan, Romal Riady, Rado Rianti Dewi Sulamet-Ariobimo, Rianti Dewi Rini Riastuti, Rini Rudi Subagja Satria, Bambang Eka Sholihin, Muhammad Yudi Masduky Soelistiyono, Dony Solihin, M. Yudi M. Suarthana, Eka Juni Sukirna, Iwan Sulaksana Permana Sulaksana Permana Sulaksana Permana Supriyatna, Yayat Iman Tri Partuti Venny Nur Avifa Vika Rizkia Wahyu Kartika Wahyu Kartika Wahyu Mayangsari Wahyu Mayangsari Widianto, Shilla Rizqi Wijaya, Arie Wisnu Ari Adi Yarianto Sugeng Budi Susilo Yarianto Sugeng Budi Susilo, Yarianto Sugeng Budi Yayat Iman Supriyatna Yudha Pratesa Yusran asfar, Muhammad Ibkar Zulfia Syahrial, Anne

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