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All Journal Jurnal Rekayasa Proses Jurnal Sains Materi Indonesia World Chemical Engineering Journal Teknika: Jurnal Sains dan Teknologi Jurnal Furnace Widyariset Jurnal Teknika Indonesian Journal of Chemistry Jurnal Rekayasa Proses Metalurgi Jurnal Metalurgi dan Material Indonesia Specta Journal of Technology Widyariset Metalurgi Jurnal Rekayasa Proses

Soesaptri Oediyani

Jurusan Teknik Metalurgi, Universitas Sultan Ageng Tirtayasa

Author-ID : 564860

Aerospace Engineering Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Library & Information Science Materials Science & Nanotechnology Mechanical Engineering Neuroscience Physics Social Sciences

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PENGARUH WAKTU REDUKSI DAN KOMPOSISI PELET TERHADAP PERSEN Fe METAL DAN PERSEN Ni FeNi SPONS DARI BIJIH NIKEL LIMONIT MENGGUNAKAN SIMULATOR ROTARY KILN [The Influence Of Reduction Time And Pellet Composition On Fe And Ni Metal Percentage Of Feni Sponge From Limonite Ore Reduced By Using Rotary Kiln Simulator] Yopy Henpristian; Iwan Dwi Antoro; Soesaptri Oediyani
Metalurgi Vol 29, No 3 (2014): Metalurgi Vol.29 NO.3 Desember 2014
Publisher : National Research and Innovation Agency (BRIN)

Pengaruh Rapat Arus dan Waktu Pelapisan Nikel pada AISI 410 dengan Metode Pulse Electrodeposition terhadap Strukturmikro dan Laju Korosi [The Influences of Current Density and Time on Microstructure and Corrosion Rate Nickel Coating in Aisi 410 by Pulse Electro Deposition Method] Rivaldo Ramadhana Saputra; Soesaptri Oediyani; Yulinda Lestari; Efendi Mabruri
Metalurgi Vol 32, No 2 (2017): Metalurgi Vol. 32 No. 2 Agustus 2017
Publisher : National Research and Innovation Agency (BRIN)

Nickel plating process with pulse methods in AISI 410 electrodepostion has been done to reduce corrosion rate of this material in industrial applications i.e turbine blade that is often experienced corrosion problems. The coating process using nickel sulfate 250 g / l, boric acid 50 g / l and nickel chloride 45 g / l at temperature of 50-60 ° C with various of current densities for 10, 15, 20 and 25 A / dm² and time for coating process of 10, 15 and 20 minutes. Duty cylce used was 80% and the pulse frequency approximately around 100 Hz. Microstructure examined by using SEM-EDS (scanning electron microscopy-energy dispersive spectroscopy) to observe grain size and thickness of the nickel layer. Corrosion rate measured by using CMS (corrosion measurement system). The results showed that increasing of current density and coating process would reduce grain size and corrosion rate in coating area. The corrosion rate is 0.00027 mmpy when the current density is 25 A / dm² and plating time is 20 minutes. AbstrakProses pelapisan nikel dengan metode pulse electrodepostion pada AISI 410 dilakukan untuk menurunkan laju korosi AISI 410 pada aplikasi industri, yaitu turbin blade yang sering mengalami masalah korosi. Proses pelapisan menggunakan larutan nickel sulphate 250 g/l, boric acid 50 g/l dan nickel chloride 45 g/l pada temperatur 50 – 60°C dengan variasi rapat arus 10, 15, 20 dan 25 A/dm² dan lamanya proses pelapisan 10, 15 dan 20 menit. Duty cylce yang digunakan adalah 80% dan frekuensi pulse 100 Hz. Pengujian struktur mikro dilakukan menggunakan SEM-EDAX untuk melihat ukuran butir dan ketebalan lapisan nikel yang terbentuk. Pengujian laju korosi dilakukan menggunakan alat CMS. Hasil penelitian menunjukkan bahwa semakin besar rapat arus dan semakin lama proses pelapisan maka ukuran butir yang tergambarkan dalam mikrostruktur lapisan semakin kecil dan laju korosi yang terukur semakin kecil. Laju korosi paling kecil adalah 0,00027 mmpy pada rapat arus 25 A/dm² dan waktu pelapisan 20 menit.

The Effect of Voltage and Time In Synthesis Manganese Dioxide from Manganese Sulfate Precursor Eka Fitri Wulandari; Lia Andriyah; Soesaptri Oediyani; Latifa hanum Lalasari; Tri Arini; Nadia Chrisayu Natasha; Fariza Eka Yunita; Ariyo Suharyanto; Eko Sulistiyono
Metalurgi Vol 37, No 1 (2022): Metalurgi Vol. 37 No. 1 April 2022
Publisher : National Research and Innovation Agency (BRIN)

The utilization of manganese dioxide (MnO2) as a cathode material for lithium-ion battery has attract many attentions because of their excellent electrochemical properties which have high theoretical storage capacity of 615 mAh/g. In this study, synthesis of MnO2 was carried out from manganese sulfate (MnSO4) precursor which is a pregnant leach solution from the leaching process of manganese ore from Trenggalek Regency. The electrolysis method has been used in this synthesis of MnO2 in an electrochemical cell consisting of two graphite electrodes with dimensions (16 x 5 x 0,3) cm. The purpose of this study is to determine the effect of voltage and time to particles amount of MnO2, to determine the phase and crystal structure of MnO2 and its morphological microstructure. The electrolysis process was carried out in 2000 ml of MnSO4 solution under constant stirring at 60oC with DC voltage varied by 2, 4, 6 and 8 volt and time varied by 4, 8, 12 and 16 hours. The precipitates formed at anode were separated, then the particles were dried at 110oC for 2 hours. The main contain of MnO2 were analyzed by X-Ray Fluorescence (XRF), the phase and crystal structure were evaluated by X-Ray Diffraction (XRD) and the morphological microstructure were captured by Scanning Electron Microscope (SEM). The results revealed that the highest particles amount of MnO2 is 31,63 grams which is electrolyzed at 8 volts for 16 hours. The highest purity of MnO2 is 89,23% which is electrolyzed at 2 volts for 16 hours. The particles produced were α-MnO2 with a tetragonal crystal system and nearly spherical in shape with size particles ranged from 136,01-202,48 and 144-352 nm.

Pengaruh Penambahan Inhibitor Ekstrak Tembakau Terhadap Laju Korosi Internal Pipa API 5L X-52 Pada Artificial Brine Water Dengan Injeksi Gas CO2 [Effect of Addition of Extracted Tobacco Inhibitor to The Corrosion Rate of Internal Steel Pipe API 5L X-52 in Artificial Brine Water With CO2 Gas Injection] Rapli Nur Ahmadi; Soesaptri Oediyani; Gadang Priyotomo
Metalurgi Vol 31, No 3 (2016): Metalurgi Vol. 31 No. 3 Desember 2016
Publisher : National Research and Innovation Agency (BRIN)

Crude oil containing brine water with high concentration of NaCl and HCO3 and the presence of dissolved CO2 gas may increase the potential for corrosion in the pipeline. The use of natural corrosion inhibitor is one of the alternative to solve these problem. Natural materials were chosen as an alternative because it is safe, readily available, biodegradable, low cost, and environmentally friendly. This study was conducted to determine the effect of tobacco extracts on the rate of corrosion and inhibition efficiency. The novelty of this research is a continuous injection of CO2 gas that does not exist in previous research. Spectroscopy analysis was conducted to determine the chemical composition of samples of steel API 5L X-52, TLC densitometry was used to determine the levels of nicotine in tobacco sauce. Gamry Potensiostat Type 6:25 was used for testing the corrosion behavior, using the Tafel polarization and EIS methods. The results show that, the corrosion rate of samples decreased with the addition of tobacco extracts. The addition of 60 ppm of tobacco extract in a solution decrease corrosion rate samples at 8.95 mpy in ABW 1 and 9.87 mpy in ABW 2. Optimum inhibition efficiency occurs upon the addition of 60 ppm tobacco extracts, for the solution of ABW 1 by 79.51% and amounted to 80.94% ABW 2. The inhibition efficiency began to decline by the addition of 80 ppm, to 42.32% in ABW 1 by and 68.71% in ABW 2.AbstrakCrude oil yang mengandung brine water dengan kadar NaCl dan HCO3 - yang tinggi serta adanya gas CO2 yang terlarut dapat meningkatkan potensi korosi pada pipa. Penggunaan inhibitor korosi alami menjadi alternatif baru untuk menyelesaikan masalah tersebut. Bahan alam dipilih sebagai alternatif karena bersifat aman, mudah didapatkan, bersifat biodegradable, biaya murah, dan ramah lingkungan. Penelitian ini dilakukan untuk mengetahui pengaruh penambahan ekstrak tembakau terhadap laju korosi dan efisiensi inhibisi yang dihasilkan dengan menambahkan pembaharuan penelitian berupa penginjeksian gas CO2 secara kontinu yang belum ada pada penelitian sebelumnya. Pengujian pada penelitian ini menggunakan spectroscopy untuk mengetahui komposisi kimia sampel baja API 5L X-52, TLC. Densitometri digunakan untuk mengetahui kadar nikotin pada sampel tembakau. Gamry Potensiostat Type 6.25 digunakan untuk pengujian polarisasi Tafel dan EIS. Hasil penelitian menunjukkan bahwa data laju korosi baja API 5L X-52 mengalami penurunan dengan penambahan ekstrak tembakau. Penurunan optimum laju korosi terjadi pada penambahan 60 ppm ekstrak tembakau pada larutan ABW 1 sebesar 8,95 mpy dan ABW 2 sebesar 9,87 mpy. Peningkatan optimum efisiensi inhibisi terjadi pada penambahan 60 ppm ekstrak tembakau, untuk larutan ABW 1 sebesar 79,51% dan ABW 2 sebesar 80,94%. Efisiensi inhibisi mulai mengalami penurunan kembali pada penambahan 80 ppm, untuk larutan ABW 1 sebesar 42,32% dan ABW 2 sebesar 68,71%.

The Added Value of Copper and Silver Metal from Printed Circuit Boards Waste Using Davis Tube with Variations of Size and Magnetic Intensity Oediyani, Soesaptri; Suwandana, Rahman Faiz; Triana, Tiara; Kusumangingtyas, Dewi; Pradana, Adjie; Syaifara, Zuhrainis
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.2024.747

The widespread use of electronic devices has led to a significant increase in electronic waste, including PCB (printed circuit board) waste. PCBs contain valuable metals like copper and silver, which can be reclaimed and reused. Recently, there has been a growing demand for urban mining processes to extract electronic waste PCB Flame Retardant-2 (FR-2) from laptops and computers. During the urban mining process, PCB FR-2 waste undergoes various physical treatments such as dismantling, crushing, and concentration processes. One of the concentration processes involves magnetic separation using a Davis tube. This study aims to investigate the effects of size and magnetic intensity variations on the recovery of copper and silver levels in FR-2 PCB waste. The magnetic concentration process was carried out using different size ranges (-63+100#, -100+150#, -150#) and magnetic intensities (1000 G, 2000 G, 3000 G). The results indicated that the most effective size for separating copper and silver is -63+100# and the optimal magnetic intensity is 1000 G. This resulted in copper and silver content of 45.66% and 0.162%, with recoveries of 80.135% and 62.505% respectively.

Kinetic of Dissolution of Nickel Limonite Calcine by Sulfuric Acid Solution Setiawan, Iwan; Nabilah, Annisa; Oediyani, Soesaptri; Subagja, Rudi; Irawan, Januar; Sampoerno, Arief Budi; Yunita, Fariza Eka; Suharyanto, Ariyo; Syahid, Adi Noer
Metalurgi Vol 38, No 3 (2023): Metalurgi Vol. 38 No. 3 2023
Publisher : National Research and Innovation Agency (BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/metalurgi.2023.740

Currently, more than 60% of nickel processing is carried out using nickel sulfide as a raw material. Nonetheless, due to the depletion reserves of nickel sulphide, nickel laterite has drawn a lot of interest to be processed as raw material. Nickel laterite in Indonesia is generally found in low grades, with nickel concentration of <1.15%. One method of treating nickel limonite is leaching in a sulfuric acid solution. This study aims to determine the reaction rate in the leaching process of calcine nickel limonite and the effect of sulfuric acid concentration and leaching temperature on the percent nickel extraction. In this research, the limonite ore from Pomalaa, Southeast Sulawesi, Indonesia, which has undergone a reduction process, was used as raw material. This research was conducted by leaching method on nickel limonite calcine using sulfuric acid reagent with 0.2, 0.5, and 1 M concentration variation, temperature variations of 60, 70, and 90°C, stirring speed 500 rpm, and %S/L (w/w) 10%. In this leaching research, the activation energy obtained at a sulfuric acid concentration of 0.2, 0.5, and 1 M are 13,7379 kJ/mol, 19,7582 kJ/mol, 20,3161 kJ/mol, respectively. The leaching process of nickel limonite calcine was controlled by diffusion. The optimum nickel extraction percentage in this study was 97.45%, obtained at a concentration of 1 M sulfuric acid, temperature of 70 °C, and leaching time of 240 minutes.

A Preliminary Study of Cobalt Solvent Extraction from Nickel Sulphate Solution Using Organic Extractant-PC-88A Subagja, Rudi; Rohman, Arief Dwi; Milandia, Anistasia; Oediyani, Soesaptri; Setiawan, Iwan
Metalurgi Vol 38, No 1 (2023): Metalurgi Vol. 38 No. 1 2023
Publisher : National Research and Innovation Agency (BRIN)

In present study, a solvent extraction experiment has been done to separate cobalt from the nickel sulfate solution by using 2-ethythexyl phosponic acid mono-2-ethylhexyl ester (PC-88A) as extractant. The experiment was carried out on a laboratory scale by using a separating funnel to extract cobalt from the nickel sulfate solution with PC88A. The mixed solution was shake in separating funnel for a specified period of time, and after the solvent extraction experiment was finished the organic phase PC88 was separated from the nickel sulfate solution by decantation. The nickel and cobalt content in the aqueous nickel sulfate solution were then analyzed using Atomic absorption spectrophotometry (AAS). In this experiment, the variable for experiments were covering solution pH from 2 to 6, shaking time from 30 minutes to 120 minutes, shaking speed from 20 revolutions per minute (rpm) to 80 rpm, and the volumeratio of aqueous to organic phase (A:O ratio) was from 1:1 to 1:4. The effects that experimental variables to the cobalt extraction were observed in this experiment. The result of experiment at room temperature, solution pH 5, shaking speed 60 rpm, shaking time 90 minutes, A:O ratio 1:4 and concentration of PC- 88A 40% show 97.21% of cobalt can be extracted by PC-88A from nickel sulfate solution, thererfore it was necessary to conduct two stage extraction process to extract 100% of the cobalt from the nickel sulfate solution.

IRON REMOVAL PROCESS FROM NICKEL PREGNANT LEACH SOLUTION USING SODIUM HYDROXIDE Zunaidi, Mochamad Afriansyah; Setiawan, Iwan; Oediyani, Soesaptri; Irawan, Januar; Rhamdani, Ahmad Rizky; Syahid, Adi Noer
Metalurgi Vol 37, No 3 (2022): Metalurgi Vol. 37 No. 3 Desember 2022
Publisher : National Research and Innovation Agency (BRIN)

Indonesia is a country that has abundant mineral resources, including nickel resources in laterite ore. Nickel demand has risen significantly because of the need for nickel precursors for battery production. Nickel laterite can be processed via the hydrometallurgical route to obtain nickel precursor by leaching the laterite ore with an acid solution to produce a nickel-rich solution or Pregnant Leach Solutions (PLS). This nickel-rich solution is then processed by precipitation with a base solution to make its hydroxides known as Mixed Hydroxides Precipitate (MHP). MHP is the main product that contains nickel and cobalt for making the material for a lithium battery. PLS usually contain iron impurity, which also dissolves when the ore is leached. Therefore, the iron needs to be separated to make high-purity MHP. To solve this problem, synthetic PLS contained nickel, cobalt, and iron, and their concentration was simulated to match the general PLS composition. From the experiment, it was observed that iron could be precipitated at two stages at solution pH of 3 and 3.5 using 2.5 M NaOH solution. After that, nickel and cobalt can be precipitated at higher pH. To study the effect of pH and temperature on the yield of nickel and cobalt precipitation, precipitation at pH of 7, 8, and 9; and temperature of 70, 80, and 90 °C was conducted. The results show that the highest yield was obtained at a pH of 9 and temperature of 90 °C, with precipitation yield of nickel and cobalt at 99.03% and 98.78%, respectively.

Study on Leaching Lanthanum From Ferronickel Slag With Pretreatment Alkaline Fusion Yudomustafa, Fakhruddin; Febriana, Eni; Mayangsari, Wahyu; Ciptasari, Nurhayati Indah; Akbar, Ari Yustisia; Hendrik, Hendrik; Oediyani, Soesaptri; Prasetyo, Agus Budi
Metalurgi Vol 39, No 2 (2024): Metalurgi Vol. 39 No. 2 2024
Publisher : National Research and Innovation Agency (BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/metalurgi.2024.764

Ferronickel slag is a byproduct of nickel ore smelting. Several efforts have been made to find alternative applications for ferronickel slag, such as the production of construction materials, cement, or geopolymers. It is reported that 38% is used for road construction, 48% is used for industrial cement mixtures, and the rest is used for fertilizers, geopolymers, and hydraulic techniques. Ferronickel slag still contains some valuable minerals such as silica, magnesium, nickel, iron, and several REEs (rare earth elements). One of the REEs, namely lanthanum, has many applications, including Ni-MH (nickel-metal hydride) batteries, phosphors for lamps, fluid-cracking catalysts for oil refining, LaNi5 for hydrogen gas storage, metal alloys for cast iron, steel and magnesium alloys, additives for glassware (for cameras), and lanthanum hexaboride ceramic. In connection with the slag, which contains impurities in strong silica compounds, it is necessary to carry out an alkaline fusion treatment. Alkaline fusion was carried out by varying the time from 0.5 to 4 hours and the ratio of the mass of slag to NaOH: 1:0.6, 1:1, 1:1.23, 1:1.47, and 1:1.84. The biggest decrease in SiO2 was in the 3-hour alkaline fusion time, from 48.347% to 27.3%, and in the mass ratio at 1:1.47, from 48.347% to 21.413%. This research aims to provide added value for ferronickel slag by extracting lanthanum by acid leaching using H2SO4 reagent by varying the time (5, 10, 30, 60, and 120 minutes), temperature (30, 60, and 90 °C), and concentration (1, 2, and 3 M). The results showed that the best leaching point was at 5 minutes, 30 °C, and 1 M, yielding a lanthanum extraction percentage of 38.082%.

Study of Iron and Calcium Removal on Manganese Sulfate Precursors for Battery Cathode Raw Material Applications Hakim, Agsel Fauzia; Andriyah, Lia; Oediyani, Soesaptri; Lalasari, Latifa Hanum; Sulistiyono, Eko; Irawan, Januar; Arini, Tri; Yunita, Fariza Eka; Suharyanto, Ariyo; Setiawan, Iwan; Firdiyono, Florentinus; Yuwono, Akhmad Herman
Metalurgi Vol 39, No 2 (2024): Metalurgi Vol. 39 No. 2 2024
Publisher : National Research and Innovation Agency (BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/metalurgi.2024.753

Global battery sales are expected to reach $310.8 billion in 2027, up 14.1% from 2020. 95% of the world's batteries are lead-acid, lithium-ion, or nickel-based. One of the most popular batteries on the global market is lithium-ion, which uses MnSO4 powder as its cathode raw material. Manganese sulfate-based lithium-ion batteries can be made using Indonesian resources, specifically manganese ore from Trenggalek. Trenggalek manganese ore is of poor quality and contains impurities, primarily Fe and Ca. To produce 98% powder manganese sulfate, the solution is prepared, reduced with briquette charcoal, leached, precipitated, carbonated, and crystallised. NH4OH reagent is used to remove Fe through precipitation, and the carbonatation process is employed to eliminate Ca, resulting in 97.237% purity of manganese sulfate powder product. This outcome is achieved under precipitation process conditions of [NH4OH 2M], T = 80 °C, pH = 4, t =180 minutes, while carbonatation process conditions are T=50 °C, t = 120 minutes.

Co-Authors Aflahal Putra Zain Agnes Stephani Ahmadi, Rapli Nur Akbar, Ari Yustisia Akhmad Herman Yuwono Alflahal Putra Zain, Alflahal Putra Ali, Bintang Miraj Andinnie Juniarsih Andinnie Juniarsih, Andinnie Andriyah, Lia Anistasia Milandia Anistasia Milandia, Anistasia Antoro, Iwan Dwi Arham, La Ode Arini Nikitasari Ariyo Suharyanto Bening Nurul Hidayah Kambuna Bobby Fadillah Budiharto, Arief Yusuf Chusnul Khotimah Ciptasari, Nurhayati Indah Della Izzaty Salman Efendi Mabruri Eka Fitri Wulandari Eko Sulistiyono Eko Sulistiyono, Eko Elma Firdaus Fariza Eka Yunita Febriana, Eni Fika Rofiek Mufakhir Florentinus Firdiyono Gadang Priyotomo Gadang Priyotomo Hafid Zul Hakim Hakim, Agsel Fauzia Handayani, Murti Hendrik Hendrik Henpristian, Yopy Himawan Tri Bayu Murti Petrus Ifzan, Ifzan Imran, Muhammad Ali Intan, Vanessa Irawan, Januar Iwan Dwi Antoro Iwan Setiawan J M Sinaga Jayawarsa, A.A. Ketut Jones Maima Sinaga Kusnadi Kusnadi Kusnadi Kustiarana Willyandhika, Kustiarana Kusumangingtyas, Dewi Lalasari, Latifa Hanum Latifa Hanum Lalasari Lestari, Yulinda Lia Andriyah Mabruri, Efendi Mamby, Hasudungan Eric Maya Saputri Mufakhir, Fika Rofiek Murti Handayani NABILAH, ANNISA Nabilah, Siti Nadia Chrisayu Natasha Poernomo, Venny Pradana, Adjie Prasetyo, Agus Budi Rahman Faiz Suwandana Ramadhan, Naufal Rafeca Rapli Nur Ahmadi Rhamdani, Ahmad Rizky Rindang Puspa Rini Rivaldo Ramadhana Saputra Rohman, Arief Dwi Salman, Della Izzati Sampoerno, Arief Budi Saputra, Rivaldo Ramadhana Slamet Sumardi, Slamet Subagja, Rudi Suharto Suharto Suharyanto, Ariyo Suratman Suratman Syahid, Adi Noer Syaifara, Zuhrainis Tiara Triana Tio Aji Pamungkas Tri Arini Tri Arini, Tri Triana, Tiara Triana, Tiara Wahyu Mayangsari Widi Astuti Widi Astuti Yopy Henpristian Yudomustafa, Fakhruddin Yulinda Lestari Yunita, Fariza Eka Zunaidi, Mochamad Afriansyah

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