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Soesaptri Oediyani
Jurusan Teknik Metalurgi, Universitas Sultan Ageng Tirtayasa
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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Journal : World Chemical Engineering Journal

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Centrifugal Concentration of Mandailing Natal North Sumatera Gold Ores Using Knelson Concentrator Oediyani, Soesaptri; Triana, Tiara; Ifzan, Ifzan; Mamby, Hasudungan Eric
World Chemical Engineering Journal VOLUME 5 NO. 2 DECEMBER 2021
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/wcej.v5i2.12974

Abstract

Gravity concentration is the type of separation process of minerals based upon the difference in density. This technique has been known for centuries. It has the ability to separate the valuable minerals with relatively low production cost and little environmental impact, such as gold ores. Separation of gold from gangue minerals by using gravity concentration has been used for decades. In fact, it has the limitation to process fine particles. In attempt to recover fine particles using gravity concentration methods, the technique has been developed by combining centrifugal force. One of wellknown devices, Knelson Concentrator, was used to separate gravity recoverable golds (GRG) from the gangue minerals of Mandailing Natal (North Sumatera) sulfide complex gold ores with -200# of particle size. The head grade of ores was 5 g/t of gold. The ores were separated by using Knelson Concentrator with variation of pulp density, feeding rate, and water fluidization pressure. The results have proved that these three variables have particular impacts on gold recovery. The recovery of gold was increased by the increasing of pulp density until it reached the optimum level in 25% of solid with 86.9% of gold recovered, and then decresed by increasing of pulp density into 84.88% of gold with 30% of solid in pulp. It has the same trends in variation of feeding rate and water fluidization pressure. The highest point with 87.08% of recovery and 17.88 g/t of concentrate grade was anchieved at 25% of solid, 0.7 kg/minutes of feeding rate, and 2.7 kg/cm2 of water fluidization pressure.
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