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IDENTIFIKASI PERUBAHAN MINERAL SELAMA PROSES PEMANASAN PELET KOMPOSIT NIKEL DENGAN ANALISIS DIFRAKSI SINAR X ( IDENTIFICATION OF MINERAL CHANGES DURING HEATING OF NICKEL COMPOSITE USING X-RAY DIFFRACTION ANALYSIS ) Permatasari, Nur Vita; Kawigraha, Adji; Hapid, Abdul; Wibowo, Nurhadi
Majalah Ilmiah Pengkajian Industri Vol 12, No 1 (2018): Majalah Ilmiah Pengkajian Industri
Publisher : BPPT

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (537.521 KB) | DOI: 10.29122/mipi.v12i1.479

Abstract

Logam nikel didapat dari proses pengolahan bijih nikel yang salah satunya adalah saprolit. Pada penelitian ini proses reduksi pelet komposit yang merupakan masa campuran bijih nikel serta batubara kadar rendah dan bahan tambahan dilakukan dalam tungku tabung. Proses reduksi dilakukan pada temperatur 450 °C, 700 °C serta 1100 °C selama 0 jam. Proses reduksi juga dilakukan pada temperatur yang lebih tinggi yaitu 1300 °C namun dengan pemanasan terlebih dahulu pada temperatur 700 °C dan ditahan pada 1 jam dan 2 jam. Produk pelet komposit dianalisis dengan metode difraksi sinar X untuk mengetahui kandungan mineralnya. Hasil menunjukkan bahwa pemanasan pelet komposit menyebabkan terjadinya perubahan warna dari warna coklat menjadi abu-abu. Pemanasan juga menyebabkan terjadinya perubahan komposisi mineral dari masing-masing pelet. Mineral-mineral yang terdapat dalam pelet komposit dan produknya adalah antigorit, klinoklor, kuarsa, enstatit, forsterit,gutit, hematit, magnetit, nikel dan besi. Pemanasan pelet pada temperatur rendah yang lebih lama akan menghasilkan jumlah logam besi yang lebih rendah. Nickel is obtained from saprolite through nickel ore processing. In this study, reduction of composite pellet has been done in a tube furnace. The pellet comsist of nickel ore, coal and additive. The reduction process carried out at 450˚C, 700˚C and 1100˚C for 0 hour. Moreover the reduction is also carried out at 700 °C during 1 and 2 hours followed by heating at 1300˚C for 2 and 1 hours. Reduction product was analyzed by X-Ray diffraction to determine the mineral content. The results indicate that the heating causing color changes from red brown to gray. Heating changes the mineral composition of the pellet. The minerals are antigorite, clinoclore, quartz, enstatite, forsterite, goethite, hematite, magnetite, nickel and iron. Heating the pellets at low temperature longer will produce lower iron.
BENEFISIASI BIJIH BESI DENGAN PROSES FROTH FLOTASI Kawigraha, Adji; Sarnety, Sri; Hapid, Abdul; Yusuf, Akil
Jurnal Sains dan Teknologi Indonesia Vol. 11 No. 2 (2009)
Publisher : Badan Pengkajian dan Penerapan Teknologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (5.806 KB) | DOI: 10.29122/jsti.v11i2.819

Abstract

Iron ore is one of important raw material for metal production. Indonesian iron ore has been separated from its impurities by froth flotation using pine oil and oleic acid as frothers. The result is compared by the same process using pH. The results show that Fe recovery will decrease with increasing pH and Fe recovery can beoptimised by using between 500 to 1250 g/t of oleic acid and 25 to 175 g/t of pine oil as reagent.
IDENTIFIKASI PERUBAHAN MINERAL SELAMA PROSES PEMANASAN PELET KOMPOSIT NIKEL DENGAN ANALISIS DIFRAKSI SINAR X ( IDENTIFICATION OF MINERAL CHANGES DURING HEATING OF NICKEL COMPOSITE USING X-RAY DIFFRACTION ANALYSIS ) Permatasari, Nur Vita; Kawigraha, Adji; Hapid, Abdul; Wibowo, Nurhadi
Majalah Ilmiah Pengkajian Industri Vol 12, No 1 (2018): Majalah Ilmiah Pengkajian Industri
Publisher : BPPT

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (537.521 KB) | DOI: 10.29122/mipi.v12i1.479

Abstract

Logam nikel didapat dari proses pengolahan bijih nikel yang salah satunya adalah saprolit. Pada penelitian ini proses reduksi pelet komposit yang merupakan masa campuran bijih nikel serta batubara kadar rendah dan bahan tambahan dilakukan dalam tungku tabung. Proses reduksi dilakukan pada temperatur 450 °C, 700 °C serta 1100 °C selama 0 jam. Proses reduksi juga dilakukan pada temperatur yang lebih tinggi yaitu 1300 °C namun dengan pemanasan terlebih dahulu pada temperatur 700 °C dan ditahan pada 1 jam dan 2 jam. Produk pelet komposit dianalisis dengan metode difraksi sinar X untuk mengetahui kandungan mineralnya. Hasil menunjukkan bahwa pemanasan pelet komposit menyebabkan terjadinya perubahan warna dari warna coklat menjadi abu-abu. Pemanasan juga menyebabkan terjadinya perubahan komposisi mineral dari masing-masing pelet. Mineral-mineral yang terdapat dalam pelet komposit dan produknya adalah antigorit, klinoklor, kuarsa, enstatit, forsterit,gutit, hematit, magnetit, nikel dan besi. Pemanasan pelet pada temperatur rendah yang lebih lama akan menghasilkan jumlah logam besi yang lebih rendah. Nickel is obtained from saprolite through nickel ore processing. In this study, reduction of composite pellet has been done in a tube furnace. The pellet comsist of nickel ore, coal and additive. The reduction process carried out at 450?C, 700?C and 1100?C for 0 hour. Moreover the reduction is also carried out at 700 °C during 1 and 2 hours followed by heating at 1300?C for 2 and 1 hours. Reduction product was analyzed by X-Ray diffraction to determine the mineral content. The results indicate that the heating causing color changes from red brown to gray. Heating changes the mineral composition of the pellet. The minerals are antigorite, clinoclore, quartz, enstatite, forsterite, goethite, hematite, magnetite, nickel and iron. Heating the pellets at low temperature longer will produce lower iron.
Optimization of adaptive and sustainable gold ore grinding processes for better environmental and land conditions in the small-scale gold mining sector in Indonesia Nurjaman, Dadan Mohamad; Titah, Harmin Sulistiyaning; Kawigraha, Adji; Purwanti, Ipung Fitri; Hidayat, Wahyu
Journal of Degraded and Mining Lands Management Vol. 11 No. 3 (2024)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2024.113.5635

Abstract

The artisanal and small-scale gold mining (ASGM) sector largely relies on mercury in gold processing, posing potential environmental contamination, health issues, and land degradation. In the villages of Tatelu and Talawaan, ASGM operations, guided by local knowledge and resources, have transitioned to using cyanide leaching for gold processing sustainably. These operations utilize andesitic stones from river deposits as grinding media in the grinding process. However, the cyanide leaching results were not optimal, with a gold recovery below 60%. This leaves significant amounts of gold in the waste, necessitating further processing and the incomplete treatment of free cyanide waste. The suboptimal gold recovery in cyanide leaching is attributed to the inadequate grain size liberation during grinding. This study optimized grinding by comparing andesitic stone grinding media with steel balls and rods. The findings indicate that to achieve a grain size of 75% passing 74 um, grinding with andesitic stones takes 4 hours, while steel rods and balls take 3 hours. For a grain size of 75% passing 44 um, grinding with andesitic stones, steel balls, and rods requires 6 hours. With more precise process parameters, locally available andesitic stones can be an effective grinding medium to optimize gold recovery. In line with optimizing gold recovery, this will enhance ASGM's revenue, encouraging the adoption of waste management practices to alleviate environmental impact, health risks, and land degradation. This aligns with the promotion of sustainable practices within the ASGM sector.
Pengembangan Aplikasi E-Inventory Barang Inventaris Negera di PTPSM- BPPT Hudiya, Noval; Puspita, Angella Natalia Ghea; Kawigraha, Adji; Hapid, Abdul
Jurnal Teknologi Informasi dan Ilmu Komputer Vol 8 No 4: Agustus 2021
Publisher : Fakultas Ilmu Komputer, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25126/jtiik.2021844504

Abstract

Teknologi informasi saat ini adalah salah satu yang berkembang pesat sehingga dapat menawarkan banyak solusi untuk menyelesaikan berbagai permasalahan di segala sektor. Salah satu pemanfaatan teknologi informasi antara lain melalui e-Government. e-Government merupakan sebuah upaya penggunaan teknologi informasi digital untuk mentransformasikan kegiatan pemerintah yang bertujuan untuk meningkatkan efektivitas, efisensi dan penyampaian layanan. Salah satu bentuk aplikasi e-Government yaitu e-Inventory. Aplikasi ini bisa digunakan sebagai solusi terhadap permasalahan pendokumentasian barang inventaris negara seperti pencatatan data yang masih dilakukan secara manual, tidak terupdatenya data inventaris secara rutin, dan kesulitan dalam pengambilan data apabila terjadi pemeriksaan oleh Inspektorat atau Badan Pemeriksa Keuangan (BPK). Permasalahan ini salah satunya terjadi di unit kerja Pusat Teknologi Pengembangan Sumberdaya Mineral (PTPSM), Badan Pengkajian dan Penerapan Teknologi (BPPT) yang masih mengalami kendala dalam pencatatan barang inventaris secara efektif, efisien dan terorganisir. Oleh karena itu, maka dikembangkan sebuah aplikasi e-Inventory barang inventaris melalui web dan mobile. Pengembangan aplikasi e-Inventory ini dikembangkan sampai pada tahap perancangan desain fitur dan desain tampilan (mock up). Adapun tujuan dari pengembangan aplikasi e-Inventory barang inventaris ini adalah untuk memudahkan dalam mengupdate data barang inventaris negara, mendokumentasikan barang investaris negara menjadi lebih baik, dan memudahkan dalam pengambilan data di unit kerja PTPSM – BPPT, dan pengembangan aplikasi ini sebagai pembaharuan (novelty) di lingkungan BPPT karena belum ada pengembangan aplikasi e-Goverment terkait e-Inventory di BPPT. AbstractInformation technology is currently one of the fastest growing, so that it can offer many solutions to solve various problems in all sectors. One of the uses of information technology is through e-Government. e-Government is an effort to use digital information technology to transform government activities aimed at increasing the effectiveness, efficiency, and service delivery. One form of e-Government is e-Inventory. This application can be used as a solution to the problem of documenting state inventory item such as recording data that is still manually, not regularly inventorying data, and difficulties in retrieving data in event of an inspection by the Inspectorate or Audit Board of the Republic Indonesia (BPK). This problem is one of which occurs in the work unit of Center for Mineral Resource Development Technology (PTPSM), Agency of Assessment and Application Technology (BPPT), which is still experiencing problems in recording inventory item effectively, efficiently, and organized. Therefore, an e-Inventory application for inventory items was develop through in web and mobile. The e-Inventory application development was developed until the design phase of feature design and display design (mock up). The purposes of developing e-Inventory application for inventory items is to make easier and update data on state inventory items, better document the country’s investment goods, and facilitate data retrieval in the work unit PTPSM – BPPT, and the development of this application is a novelty in BPPT because there is no development of e-Government application related to e-Inventory at BPPT.