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All Journal Rekayasa Mesin Teknologi Indonesia Metalurgi Jurnal Riset Teknologi Pencegahan Pencemaran Industri
Slamet Sumardi, Slamet
UPT Balai Pengolahan Mineral Lampung, LIPI Jln. Ir. Sutami Km. 15 Tanjung Bintang, Lampung Selatan, 35364
Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Energy Engineering Environmental Science Mechanical Engineering

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CHARACTERIZATION AND PROSPECTIVE PROCESS OF MANGANESE ORE OF TANGGAMUS AND WAY KANAN REGENCY LAMPUNG PROVINCE Mufakhir, Fika Rofiek; Sumardi, Slamet
Teknologi Indonesia Vol 37, No 1 (2014)
Publisher : LIPI Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (16.051 KB) | DOI: 10.14203/jti.v37i1.216

Abstract

Manganese (Mn) has a very important role in various industrial fields such as iron, steel, food, agriculture and chemical industry. High grade Mn ore(>40%) are generally processed through the pyrometallurgy process, whereas for low grade Mn ore (<40%) is processed through the hydrometallurgical treatment process. This study aims to characterize the Mnore in Tanggamus and Way Kanan Regency Lampung Province and prospective process. Experiment begins with a sampling of the area in Tanggamus and Way Kanan mine. Sample preparation is then performed by reducing the particle size of the ore through the stages of crushing, grinding and particle size distribution. Mn ore sample which has been reduced then performed characterization using X-Ray Fluorescence (XRF), X-Ray Diffraction (XRD) and Scanning Electron Microscope (SEM). The results showed that the characteristics of Mn ore in Tanggamus and Way Kanan mine was different. Mn ore Tanggamus have the highest contentof 33.84% Mn associated with Fe2O3 minerals, while Mn ore Way Kanan had content 18.03% associated with SiO2 minerals. Both Mn ore are included in low grade Mn ore (<40). Prospective processing of manganese ore is initiated by benefitiation and proceed by leaching method.
STUDI KINETIKA PELINDIAN BIJIH MANGAN KADAR RENDAH DAERAH WAY KANAN LAMPUNG DENGAN MENGGUNAKAN MOLASES DALAM SUASANA ASAM Sumardi, Slamet; Mufakhir, Fika Rofiek; Prasetyo, Agus Budi
Metalurgi Vol 29, No 2 (2014): Metalurgi Vol.29 No.2 Agustus 2014
Publisher : Pusat Penelitian Metalurgi dan Material - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (485.099 KB) | DOI: 10.14203/metalurgi.v29i2.282

Abstract

STUDI KINETIKA PELINDIAN BIJIH MANGAN KADAR RENDAH DAERAH WAY KANANLAMPUNG DENGAN MENGGUNAKAN MOLASES DALAM SUASANA ASAM. Telah dilakukanpercobaan pelindian bijih mangan kadar rendah daerah Way Kanan Lampung dengan menggunakan molaseshasil limbah pabrik tebu dalam suasana asam sulfat. Percobaan ini dilakukan untuk mempelajari pengendali lajuproses dalam pelindian bijih mangan, nilai-nilai konstanta laju reaksi dan/atau konstanta difusi serta energiaktivasinya. Pelindian dilakukan dengan kondisi percobaan yang tetap untuk persen solid padatan 10%,kecepatan pengadukan 300 rpm, dosis pemberian molases sebanyak 80 g/L sedangkan suhu dan konsentrasiyang divariasikan. Studi kinetika diasumsikan dengan pendekatan Shrinking Core Model (SCM). Pelindian bijihmangan kadar rendah daerah Way Kanan Lampung dapat dilakukan dengan menggunakan molases sebagaipereduksi dan dalam medium asam sulfat. Hasil penelitian terhadap kinetika pelindian mangan denganmenggunakan molases sebagai agen pereduksi menunjukkan bahwa tahap pengendali laju pelindian adalah difusiproduk reaksi melalui inti yang tidak bereaksi dengan energi aktivasi sebesar 3,73 kkal/mol.
PELINDIAN REDUKTIF BIJIH MANGAN NUSA TENGGARA TIMUR DENGAN MENGGUNAKAN MOLASES DALAM SUASANA ASAM[Reductive Leaching of Manganese Ore from East Nusa Tenggara With Molasses in Sulfuric Acid Solution] Sumardi, Slamet; Mubarok, Mohammad Zaki; Saleh, Nuryadi; Firdiyono, F
Metalurgi Vol 27, No 3 (2012): Metalurgi Vol.27 No.3 Desember 2012
Publisher : Pusat Penelitian Metalurgi dan Material - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (375.517 KB) | DOI: 10.14203/metalurgi.v27i3.239

Abstract

PELINDIAN REDUKTIF BIJIH MANGAN NUSA TENGGARA TIMUR DENGAN MENGGUNAKANMOLASES DALAM SUASANA ASAM . Mangan merupakan logam keempat yang sering digunakan dalamkehidupan sehari-hari selain besi,aluminium dan tembaga. Penggunaan lain dari mangan adalah sebagai bahankimia, desinfektan dan oksidator. Dalam penelitian ini telah dilakukan pengambilan logam mangan dari bijihmangan daerah Kupang Nusa tenggara Timur dengan metode pelindian reduktif dalam suasana asam sulfat.Agen pereduksi yang digunakan berupa limbah pabrik gula tebu yang dinamakan molases. Tujuan penelitian iniadalah untuk mengetahui pengaruh konsentrasi asam sulfat, suhu pelindian dan persen solid terhadap persenekstraksi mangan dan persen ekstraksi keterlarutan besi. Penelitian diawali dengan preparasi bijih mangan yaitudengan cara mereduksi ukuran hingga mesh 140 dan dilakukan analisa komposisi kandungan logam sampelbijih dengan menggunakan XRF (x-ray fluorescence). Sejumlah sampel bijih mangan dimasukkan ke dalamreaktor pelindian yang telah berisi asam sulfat dan molases. Variasi percobaan yang digunakan dalam penelitianini adalah konsentrasi reagen pelindi yaitu asam sulfat, suhu pelindian dan persen solid yang digunakan.Pelindian yang bersifat reduktif ini dilakukan selama 6 jam dengan kecepatan pengadukan dibuat tetap yaitu 200rpm. Persen ekstraksi mangan tertinggi untuk percobaan pelindian reduktif bijih mangan dengan molases sebagaiagen pereduksi dalam suasana asam sulfat sebesar 95,33%. Hasil ini dicapai pada konsentrasi asam sulfat 6%,suhu pelindian 70 °C, persen solid 10%, molases yang digunakan 100g/L, kecepatan pengadukan 200 rpm danwaktu pelindian 6 jam. AbstractManganese is the fourth most used metal in daily lives besides iron, aluminium and copper. Other usage ofmanganese is for chemical raw material disinfectant and chemical oxidizing. This experiment was done inKupang, East Nusa Tenggara to extract manganese from manganese ores by reductive leaching in sulfuricacid conditions. Molasses as waste from sugarcane factory is used as redactor. The purpose of thisexperiment is to measure the impact of sulfuric acid concentration, leaching temperature and solid percentageon percentage of manganese extraction and percentage of iron solubility extraction. This experiment ispreparing manganese ores by reducing into 140 mesh and analyze ores compositions using XRF. Someamounts of manganese ores are inserting into leaching reactor which contains sulfuric acid and molasses.Variables in this experiment are leaching concentration (sulfuric acid), leaching temperature and solidpercentage. This leaching is reductive in 6 hours with constant speed 200 rpm. Leaching solution is filteredto separate filtrate with from obtained residue. Filtrate is analyzed using AAS to measure manganese andiron content. Meanwhile residue is dried and weighed. We conclude that manganese extraction onmanganese ores from Kupang, NTT can be carried by reductive leaching using molasses as reductive agenton sulfuric acid media. The highest manganese extraction for this experiment is 95, 33 % which can beachieved by using 6% sulfuric acid, 70 oC temperature, 10 % solid, 100 g/L molasses,200 rpm mixing speedand 6 hours of leaching .
Processing of granite quarry solid waste into industrial high silica materials using leaching process with HCl concentration variation Hendronursito, Yusup; Amin, Muhammad; Sumardi, Slamet; Marjunus, Roniyus; Clarasati, Frista; Birawidha, David Candra; Muttaqqi, Muhammad Al; Isnugroho, Kusno
Jurnal Riset Teknologi Pencegahan Pencemaran Industri Vol. 11 No. 2 (2020)
Publisher : Balai Besar Standardisasi dan Pelayanan Jasa Pencegahan Pencemaran Industri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21771/jrtppi.2020.v11.no2.p43-50

Abstract

This study was aimed to increase granite's silica content using the leaching process with HCl concentration variation. The granite used in this study came from Lematang, South Lampung. This study aims to determine the effect of variations in HCl concentration, particle size, and rotational speed on the crystalline phase and chemical elements formed in the silica product produced from granite. The HCl concentration variations were 6.0 M, 7.2 M, 8.4 M, and 9.6 M, the variation in particle size used was 270 and 400 mesh. Variations in rotational speed during leaching were 500 and 750 rpm. Granite powder was calcined at 1000 ºC for 2 hours. Characterization was performed using X-Ray Fluorescence (XRF), X-Ray Diffraction (XRD), and Inductively Coupled Plasma-Optical Emission Spectroscopy (ICP- OES). The results showed that the silica content increased with increasing HCl concentration, the finer the particle size, and the higher the rotational speed. XRF analysis showed that the silica with the highest purity was leached with 9.6 HCl with a particle size of 400 mesh and a rotational speed of of 750 rpm, which was 73.49%. Based on the results above, by leaching using HCl, the Si content can increase from before. The XRD diffractogram showed that the granite powder formed the Quartz phase.
Pengaruh Sintering Serbuk Batuan Basalt sebagai Bahan Penguat pada Komposit Polyester terhadap Sifat Fisik dan Mekanik Hendronursito, Yusup; Saputra, Asep Andri; Rajaguguk, Tumpal Ojahan; Sumardi, Slamet; Supriyatna, Yayat Iman; Isnugroho, Kusno; Birawidha, David Candra; Amin, Muhammad
Jurnal Rekayasa Mesin Vol 12, No 2 (2021)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jrm.2021.012.02.16

Abstract

Basalt rock has great potential in Lampung Province but is only used as a building construction material. Basalt has superior characteristics such as abrasion/wear resistance, compressive strength and chemical reaction resistance making it suitable as a filler or reinforcement for composites. This study aims to determine the effect of basalt rock powder sintering as a reinforcing filler on the mechanical and physical properties of polymer matrix composites. The parameters used included variations in sintering temperature: 8500C, 9500C, and 1.0500C, variations in particle size: 100 < X < 150 mesh, 150 < Y < 200 mesh and 200 < Z < 270 mesh, and the volume fraction comparison of basalt sintering powder and polyester resin. 70: 30%, 80: 20%, and 90: 10%. The experimental design uses the L9 3^3 taguchi orthogonal array run 9 specimens. Taguchi analysis shows that the parameters that affect the mechanical and physical properties are the sintering temperature. sintering temperature contributed 61.77% to wear, and 87.58% to compressive strength, and 95.32% to composite density. The experimental results with the best value obtained a wear value of  0.235 x 10-7mm2 / kg, a compressive strength of 118.873 MPa, and a density of 2.272 gr/cm3.
Co-Authors Birawidha, David Candra Clarasati, Frista firdiyono, F Isnugroho, Kusno Marjunus, Roniyus Mohammad Zaki Mubarok, Mohammad Zaki Mufakhir, Fika Rofiek Muhammad Amin Muttaqqi, Muhammad Al Nuryadi Saleh, Nuryadi Prasetyo, Agus Budi Rajaguguk, Tumpal Ojahan Saputra, Asep Andri Supriyatna, Yayat Iman Yusup Hendronursito, Yusup