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All Journal Jurnal Riset Teknik Pertambangan Journal of Engineering Science and Technology Applications
Suriyanto Bakri
Program Studi Teknik Metalurgi, Institut Teknologi Bacharuddin Jusuf habibie
Control & Systems Engineering Energy Engineering Materials Science & Nanotechnology

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Pengaruh Ukuran Butir terhadap Recovery MnO pada Pemisahan Bijih Mangan Oksida Menggunakan Magnetic Separator Suriyanto Bakri; Muhammad Idris Juradi; Sitti Ratmi Nurhawaisyah; Dian Furkani
Jurnal Riset Teknik Pertambangan Volume 5, No. 2, Desember 2025, Jurnal Riset Teknik Pertambangan (JRTP)
Publisher : UPT Publikasi Ilmiah Unisba

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29313/jrtp.v5i2.7562

Abstract

Abstract. Indonesia has considerable manganese ore reserves, particularly in South Sulawesi, such as in Barru and Bone Regencies. However, most of these manganese ores still contain many impurities and have relatively low MnO content. Various beneficiation methods have been studied in recent years. This study aims to examine the effectiveness of separating manganese oxide ore using a magnetic separator with varying particle sizes. This study aims to evaluate the effect of particle size variation on the separation of manganese oxide (MnO) ore from the Ponre area, using a magnetic separator method with a primary focus on determining the MnO mineral content and recovery in each particle size fraction after the magnetic separation process. The research method used manganese ore samples that had been dried and crushed using a jaw crusher and roll crusher. The samples were then ground using a ball mill to obtain the appropriate particle size fractions. For separation purposes, the samples were classified into several size fractions: +80 mesh; -80 +100 mesh; -100 +150 mesh and -150+200 mesh. The results of manganese oxide (MnO) ore separation show that finer particle sizes do not increase MnO mineral content, nor do they increase recovery rates. Optimum recovery is achieved with MnO mineral content of 49.78% and only a 3.09% increase in MnO content for particle sizes of -100+150 mesh. Abstrak. Indonesia memiliki cadangan bijih mangan yang cukup besar, khususnya di wilayah Sulawesi Selatan seperti Kabupaten Barru dan Kabupaten Bone. Namun demikian, sebagian besar bijih mangan tersebut masih mengandung banyak mineral pengotor, serta memiliki kadar MnO yang relatif rendah. Berbagai metode benefisiasi telah dikaji dalam beberapa tahun terakhir. Penelitian ini bermaksud untuk mengkaji efektivitas pemisahan bijih mangan oksida menggunakan magnetic separator dengan variasi ukuran butir. Penelitian ini bertujuan untuk mengevaluasi pengaruh variasi ukuran butir terhadap hasil pemisahan bijih mangan oksida (MnO) asal daerah Ponre, menggunakan metode magnetic separator dengan fokus utama untuk mengetahui kadar dan recovery mineral MnO pada setiap ukuran fraksi partikel setelah proses pemisahan magnetik. Metode penelitian menggunakan sampel bijih mangan yang telah kering dihancurkan menggunakan jaw crusher dan roll crusher. Selanjutnya digerus menggunakan ball mill hingga diperoleh fraksi ukuran partikel yang sesuai. Untuk keperluan pemisahan, sampel diklasifikasikan menjadi beberapa fraksi ukuran: +80 mesh; -80 +100 mesh; -100 +150 mesh dan -150+200 mesh. Hasil pemisahan bijih mangan oksida (MnO) menunjukkan bahwa ukuran fraksi partikel yang semakin halus tidak memberikan kadar mineral MnO semakin meningkat dan begitupun juga dengan recovery yang didapatkan. Recovery optimum diperoleh kadar mineral MnO sebesar 49,78% dengan hanya diperoleh peningkatan kadar MnO sebesar 3,09% pada ukuran fraksi partikel -100+150 mesh.
Analisis Kualitas Batubara Tipe Lignit Berdasarkan Kandungan Air, Nilai Kalori, dan Total Sulfur Di Kabupaten Paser Provinsi Kalimantan Timur: Analysis of Lignite Coal Quality Based on Moisture Content, Calorific Value, and Total Sulfur in Paser Regency, East Kalimantan Province Husni; Sri Widodo; Anshariah; Suriyanto Bakri
Journal of Engineering Science and Technology Applications Vol. 4 No. 1 (2026): Journal of Engineering Science and Technology Applications
Publisher : CV Insight Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58227/jesta.v4i1.375

Abstract

Coal quality is largely determined by physical and chemical parameters, including moisture content, calorific value, total sulfur content, air-dry loss, and ash fusion temperature. This study aims to determine the quality of lignite coal in Paser Regency, East Kalimantan Province, based on the parameters of air-dry loss, moisture content, total moisture, total sulfur, and calorific value. The method used was laboratory analysis of three coal samples—PL, M, and SM—with the tested parameters including air-dry loss, moisture content, total moisture, calorific value, and total sulfur. The results showed that sample PL had an air-dry loss of 11.04%, moisture content of 13.45%, total moisture of 24.97%, and a calorific value of 5,117 kcal/kg; sample M had an air-dry loss of 12.48%, moisture content of 13.62%, total moisture of 24.97%, and a calorific value of 4,909 kcal/kg; while sample SM had an air-dry loss of 19.34%, moisture content of 15.01%, total moisture of 32.31%, and a calorific value of 4,352 kcal/kg. Based on these results, the PL sample had the highest quality with a calorific value of 5,117 kcal/kg, due to its lower dry loss and moisture content compared to the M and SM samples. Physically, the PL sample also exhibited better characteristics, namely a darker color, producing less dust during the crushing process, and being less brittle. The conclusion of this study is that the quality of lignite coal in the study area is largely determined by its low moisture content and high calorific value, with the PL sample being the highest-quality sample among the three tested
Co-Authors Anshariah Dian Furkani Husni Idris Juradi, Muhammad Sitti Ratmi Nurhawaisyah Sri Widodo