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Bakri, Suriyanto
Program Studi Teknik Pertambangan, Fakultas Teknologi Industri, Universitas Muslim Indonesia
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Studi Kualitas Aspal Buton PT Wijaya Karya Bitumen, Kabupaten Buton, Provinsi Sulawesi Tenggara: Buton Asphalt Quality Study of PT Wijaya Karya Bitumen, Buton Regency, Southeast Sulawesi Province Arham; Bakri, Hasbi; Bakri, Suriyanto
Journal of Engineering Science and Technology Applications Vol. 2 No. 2 (2024): 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.v2i2.208

Abstract

Utilization of Buton asphalt is not too maximal, it is because the quality of Buton asphalt is considered less favorable than asphalt oil. The aim of this study was to determine the percentage content of bitumen and water content at the mine site and Lawele Kabungka. Methodology The study was entirely based on laboratory data required data¬-related data quality is seen from the Buton asphalt bitumen content and moisture content of the samples taken in the field. In addition, data were also taken from the test results Research and Development Center (PUSLITBANG) Department of Public Works (PU) in the form of data ductility, penetration, flash point, softening point, lose weight, solubility in CCl4 on the content of the asphalt in two locations: Lawele and Kabungka , Based on the results of research conducted in the laboratory PT. Wijaya Karya Bitumen bitumen shows that the average levels for Lawele Buton Asphalt Bulk 28.79% and Lawele (LGA) 29.53%, while in Kabungka with an average of Buton Asphalt Bulk 25.52% and Kabungka (BGA) 26 , 83%. Both locations meet ISO standards, both asphalt in bulk form or in the form of LGA and BGA is 25%. Buton asphalt water content is quite high at the location Lawele (Buton Asphalt Bulk of 13.2%, LGA of 7.93%) and Kabungka (Buton Asphalt Bulk 11.03% BGA 8.9%). The water content of the two locations do not meet the National Standards of Indonesia (SNI) either in bulk form or in the form of BGA and LGA is constant below 2%.
Studi Blending Nikel Antara Barging Stockpile Dengan Hasil Aktual Pada PT Ariano Bintang Cemerlang: Study Of Nickel Blending Between Barging Stockpile and Actual Yield at PT Ariano Bintang Cemerlang Bakri, Suriyanto; Gaffar, Abd; Juradi, Muhammad Idris
Journal of Engineering Science and Technology Applications Vol. 1 No. 2 (2023): 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.v1i2.185

Abstract

PT Ariano Bintang Cemerlang, Kolaka, Southeast Sulawesi, is one of the companies that manages laterite nickel ore into ferronickel (FeNi) products, with a Cut Off Grade (COG) of 1.40% Ni. In the nickel management process, one of the important steps taken is blending. However, in practice, differences are often found between the projected nickel quality of the barging stockpile and the actual results after the blending process. This study aims to analyze the correspondence between the nickel quality at the barging stockpile and the actual results after blending, identify the factors that affect the difference, and provide recommendations for optimizing the blending process. This study uses a quantitative approach to analyze the conformity between the nickel quality at the barging stockpile and the actual results after the blending process. The results of the blending process analysis show that actual blending has a tendency to produce higher elemental levels in some parameters compared to plan blending. The difference between plan blending and actual blending data can be caused by the material in the stockpile, the inaccuracy of material retrieval, the efficiency of the blending equipment and process, the moisture content and condition of the material, the method of analysis and sampling. A more structured management of materials in the stockpile is needed to minimize these differences.
Analisis Dampak Kenaikan Suhu Terhadap Penurunan Kualitas Batubara Muara Bengalun PT Mitrabara Adiperdana Tbk: Analysis of the Impact of Temperature Increase on the Decrease in Coal Quality of Bengalun Muara PT Mitrabara Adiperdana Tbk Bakri, Suriyanto; Thamsi, Alam Budiman; Muhdi, Irawan
Journal of Engineering Science and Technology Applications Vol. 2 No. 1 (2024): 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.v2i1.194

Abstract

Umumnya, batubara di Indonesia dimanfaatkan sebagai bahan bakar yang biasa disebut batubara uap atau sebagai bahan baku industri baja. Meningkatnya permintaan bahan bakar batubara untuk industri menyebabkan PT Mitrabara Adiperdana Tbk., terus menerus meningkatkan produksinya. Batubara yang dihasilkan dari front penambangan pada umumnya tidak langsung dikirim ke konsumen sehingga batubara tersebut harus ditumpuk di tempat penumpukan yang disebut dengan istilah stockpile (Area timbunan). Permasalahan utama yang dihadapi PT Mitrabara Adiperdana Tbk., dalam penumpukan batubara pada stockpile adalah terjadinya peningkatan temperatur. Oleh sebab itu, perlu dilakukan analisis dampak apa saja yang terjadi pada area timbunan yang mempengaruhi kualitas batubara pada perusahaan ini. Metode penelitian diawali dengan mencari literatur laporan penelitian terdahulu dan data lainnya. Selanjutnya dilakukan observasi dan analisis kondisi di lapangan. Lokasi survey dilakukan di area PT Mitrabara Adiperdana Tbk., Kabupaten Malinau Kalimantan Utara. Pengambilan sampel dilakukan pada stockpile Muara Bengalon. Tahap ketiga dilakukan analisis data dalam menganalisis kualitas batubara di PT Mitrabara Adiperdana. Hasil penelitian menunjukkan bahwa terjadi peningkatan suhu batubara di stockpile. Pada pagi hari, suhu batubara berkisar antara 26,50ºC hingga 44,71ºC, sedangkan pada siang hari suhu meningkat menjadi 30,50ºC hingga 50,85ºC. Peningkatan suhu ini berdampak pada penurunan kualitas batubara, yang berpotensi menyebabkan swabakar
Karakteristik Mineral Pembawa Pasir Besi Daerah Pantai Pancana Kabupaten Barru Provinsi Sulawesi Selatan: Characteristics of Iron Sand Carrying Minerals in Pancana Beach Area, Barru Regency, South Sulawesi Province Zulfadli, Zulfadli; Nawir, Alfian; Harwan, Harwan; Bakri, Suriyanto
Journal of Engineering Science and Technology Applications Vol. 2 No. 1 (2024): 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.v2i1.203

Abstract

Iron sand is one of the industrial minerals. The utilization of iron sand in Indonesia is still limited to being used as a raw material for cement factories in the manufacture of concrete. Iron is given the symbol (Fe) in the periodic table's chemical element. The purpose of this study was to determine the mineral properties of iron sand and the chemical characteristics of iron sand. The research location is in the Barru district in the province of South Sulawesi, Indonesia. This research method uses XRD and XRF analysis methods. From the results of the XRD analysis, it was found that 2 minerals carrying iron sand, including the minerals Magnetite and Hematite with the percentage content of these minerals, are. Magnetite mineral (Fe3O4) 9,3% and Hematite mineral (Fe2O3) 0,3%. The results of XRF analysis show that the chemical composition contained in F2O3 minerals, containing oxide and hydroxide elements Fe, O, and Oxide, is a chemical compound that contains at least one oxygen atom and at least one other element.
Studi Pemisahan Bijih Mangan dari Paludda Daerah Barru Menggunakan Shaking Table dengan Variasi Ukuran Butir: Separation Study of Manganese Ore from Palludda Barru Region Using Shaking Table with Variation of Grain Size Fraction Bakri, Suriyanto; Ratmi Nurhawaisyah, Sitti; Nurmalasari; Iksan, Muh.; Prayitna, Yusri; Putri, Syukrika
Journal of Engineering Science and Technology Applications Vol. 3 No. 1 (2025): 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.v3i1.217

Abstract

Manganese is one of the mineral products of mining, especially those found in Indonesia, such as in the Paludda area of Barru Regency, South Sulawesi. Manganese ore is known as raw material for steel industry, battery industry and chemical industry. This research was conducted at the Mining Engineering Study Program's Materials Processing Laboratory. The purpose of this study was to determine the percentage increase in manganese ore content after the concentration process, determining the recovery of manganese ore against variations in grain size using a shaking table. The analysis used in this research includes shaking table equipment, XRF analysis and also XRD analysis, from this processing will be obtained Mn content. The results of this study show shaking table separation using operating variables with an initial sample weight of 500 grams with levels in the initial sample of MnO of 33.58%, in concentrate -65 of 26.60%, concentrate -100 of 25.93%, concentrate -150 of 25.46%, concentrate -200 of 26.93%, in tailings -65 of 24.17%, tailings -100 of 23.79%, tailings -150 of 22.79% and tailings -200 of 22.60. Therefore, the results of the study can be concluded that the shaking table operation obtained the optimal concentrate and tailings in the -150 MnO concentrate with a recovery of 23.65%, then the -100 MnO tailings with a recovery of 38.68%
Studi Sistem Penyaliran Tambang Pada Penambangan Batubara PT Tawabu Mineral Resource Kutai Timur Kalimantan Timur Kurnia Ningsi; Suriyanto Bakri; Nur Asmiani; Arif Nurwaskito
Jurnal Teknologi Sumberdaya Mineral Vol. 4 No. 1 (2023)
Publisher : Program Studi Teknik Pertambangan Fakultas Teknik Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/jeneral.v4i1.38523

Abstract

PT Tawabu Mineral Resource (TMR) merupakan perusahaan pertambangan batubara yang beroperasi di Kalimantan Timur. Sistem penambangan pada PT TMR merupakan sistem tambang terbuka. Metode tambang terbuka juga tidak terlepas dari masalah air yang masuk ke dalam area penambangan. Air hujan tidak hanya mempengaruhi area pit saja tetapi juga mempengaruhi luas area yang menjadi area tangkapannya Curah hujan yang tinggi menyebabkan air yang berasal dari limpasan permukaan dapat menggenangi lantai dasar dan menyebabkan bercampurnya front penambangan. Volume air yang limpasan yang terus bertambah pada sump akan menyebabkan masalah yang serius pada proses penambangan. Penelitian ini dilakukan dengan tujuan untuk mengetahui luas catchment area, debit air yang masuk ke daerah penambangan, jumlah pompa yang dibutuhkan dan dimensi settling pond yang digunakan untuk treatment air sebelum dialirkan ke sungai. Penelitian dimulai dengan studi literatur, pengambilan data lapangan, pengolahan data, analisis data dan penarikan kesimpulan. Pengamatan langsung di lokasi penambangan dilakukan untuk mengetahui keadaan aktual di lapangan, debit limpasan hujan dihitung dengan menggunakan rumus rasional dan Luasan catchment area ditentukan dengan mengambil gambar di lapangan kemudian gambar yang telah didapatkan dimasukkan kedalam software Global Mapper. Hasil penelitian diperoleh luas daerah tangkapan hujan (catchment area) sebesar 91,54 ha, debit air limpasan yang masuk ke daerah penambangan yaitu sebesar 1.832.263 m3/jam, sehingga dibutuhkan pompa sebanyak tiga unit untuk mengeluarkan air pada lokasi dan volume total dari settling pond yaitu 37.632 m3.
The Leaching of Manganese Ore from Patappa, Barru Regency, South Sulawesi Nurhawaisyah, Sitti Ratmi; Jafar, Nurliah; Heriansyah, Andi Fahdli; Arifin, Mubdiana; Juradi, Muhammad Idris; Febrianty, Vanda; Utami, Hesti; Bakri, Suriyanto
Indonesian Journal of Chemical Research Vol 13 No 2 (2025): Edition for September 2025
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2025.13-sit

Abstract

Manganese ores are considered economical and worth selling if they have a purity value above 40%. However, not all mined manganese metal minerals have the appropriate purity value. Manganese metal minerals can be processed using various hydrometallurgical methods to separate metal minerals from their associated minerals using solvents. The purpose of this study is to determine the results of manganese leaching recovery at each variation of temperature and percent solids and to determine the effect of both on manganese recovery. The findings of this study could significantly contribute to the field of metallurgy and mineral processing by providing a deeper understanding of the factors influencing manganese recovery. The method used in this study began with sample preparation. The results of sample preparation were analyzed using XRD (X-ray diffraction) and XRF (X-ray fluorescence). Some of the sample preparation results were leached with several variations in temperature; the leaching results were continued with analysis using AAS (Atomic Absorption Spectrophotometer). The results showed that increasing the leaching temperature and percent solids would increase the leaching reaction rate, resulting in higher Mn recovery.
Benefisiasi Pasir Besi Pantai Karsut Daerah Jeneponto Dengan Metode Konsentrasi Magnetic Separator Bakri, Suriyanto; Mursit, Mursalat; Juradi, Muhammad Idris; Arifin, Mubdiana
Jurnal Teknologi Sumberdaya Mineral Vol. 6 No. 1 (2025)
Publisher : Program Studi Teknik Pertambangan Fakultas Teknik Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/jeneral.v6i1.53438

Abstract

Pasir besi pada umumnya merupakan pasir besi pantai yang banyak tersebar di Indonesia khususnya di Sulawesi selatan. Pasir besi yang mengandung persentase kadar besi yang memenuhi syarat dapat langsung digunakan sebagai bahan campuran, namun berbeda halnya pasir besi yang mengandung kadar besi yang kurang. Daerah sepanjang Pantai Karsut Daerah Jeneponto terdapat pasir besi dengan persentase kandungan Fe di bawah 45%. Kandungan besi yang rendah pada pasir besi dapat ditingkatkan kadarnya dengan pemisahan antara mineral magnetik dengan mineral non magnetiknya. Penelitian bertujuan untuk mengetahui peningkatan kadar dan recovery besi pada bijih besi asal Pantai Karsut Daerah Jeneponto Provinsi Sulawesi Selatan. Sampel awal dianalisis menggunakan X-Ray Diffraction (XRD) dan X-Ray Fluorescence (XRF). Percobaan konsentrasi pasir besi menggunakan magnetic separator dengan variasi kecepatan putar drum yaitu pada kecepatan 200 rpm, 250 rpm, 300 rpm. Produk berupa konsentrat dilakukan analisis XRF dan dilakukan perhitungan kadar dan recovery. Hasil penelitian terhadap sampel pasir besi asal Pantai Karsut Daerah Jeneponto menggunakan magnetic separator diperoleh peningkatan kadar mineral besi oksida Fe2O3 rata-rata sebesar 8,05% untuk masing-masing variasi kecepatan putar drum. Kadar Fe2O3 meningkat seiring meningkatnya nilai kecepatan putar drum, begitupun recovery yang diperoleh. Dihasilkan kadar Fe2O3 tertinggi pada kecepatan 300 rpm dengan recovery 80,88%.
Analisis Kualitas Batubara Berdasarkan Analisis Proksimat, Total Sulfur dan Kalori di Site Jhonlin Group PT Tribhakti Inspektama: Coal Quality Analysis Based on Proximate Analysis, Total Sulfur and Calories at the Jhonlin Group Site, PT Tribhakti Inspektama Bakri, Suriyanto; Widodo, Sri; Arifin, Mubdiana; Ardana, Rifal
Journal of Engineering Science and Technology Applications Vol. 3 No. 2 (2025): 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.v3i2.299

Abstract

Coal is one of the fossil energy sources that remains the backbone of national energy needs, especially in the power generation and processing industries. The quality of coal greatly determines its economic value and efficiency of use, so a comprehensive analysis of coal characteristics is needed to determine its suitability for industry specifications and end-user requirements. PT Tribhakti Inspektama, as an independent inspection agency operating in the Jhonlin Group's working area, plays an important role in testing and monitoring the quality of coal to be marketed. This study aims to analyze coal quality based on the results of proximate analysis, total sulfur content, and calorific value in the Jhonlin Group mining area. The research method was carried out by taking coal samples from the stock file, preparing them, and analyzing them in the laboratory. The results of the study show that the proximate analysis of the samples was 4.13% ash, 20.87% moisture content, 42.21% volatile matter, and 32.77% fixed carbon. The coal in the study area is categorized as lignite with a low to sub-bituminous rating, so it still has the potential to be used for the cement industry and coal-fired power plants.
Optimalisasi Pemanfaatan Bijih Nikel Berkadar Rendah Menggunakan Metode Blending Pada PT Aneka Jasa Sorowako Kabupaten Luwu Timur Bakri, Suriyanto; Nurwaskito, Arif; Basmuddin, Abdul Azis
Jurnal of Mining Insight Vol 3 No 4 (2025): Journal of Mining Insight
Publisher : CV Insight Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58227/jmi.v3i4.309

Abstract

Permasalahan utama dalam pengolahan bijih nikel laterit adalah perbedaan kadar nikel antar tumpukan (stockpile), di mana sebagian besar bijih memiliki kadar di bawah cut off grade (COG) yang telah ditetapkan oleh perusahaan. Untuk itu, dilakukan proses blending atau pencampuran antara bijih berkadar tinggi dan rendah guna memperoleh kadar rata-rata yang memenuhi standar pengolahan pabrik. Penelitian ini menggunakan data primer yang diperoleh dari pengamatan langsung di lapangan serta data sekunder yang dikumpulkan melalui studi literatur terkait. Data kadar nikel (Ni) dan tonase dari setiap dome dianalisis menggunakan perhitungan blending guna menentukan kadar rata-rata keseluruhan. Hasil penelitian menunjukkan bahwa kadar rata-rata nikel sebelum blending bervariasi antara 1,36% hingga 2,34% dengan total tonase 10.160 ton. Setelah dilakukan blending, kadar rata-rata keseluruhan meningkat menjadi 1,77% yang telah memenuhi batas minimum pengolahan pabrik. Penerapan metode blending terbukti efektif dalam memanfaatkan bijih berkadar rendah agar tetap bernilai ekonomis, sekaligus mengurangi potensi kehilangan sumber daya (ore loss). Selain meningkatkan efisiensi dan produktivitas tambang, metode ini juga mendukung prinsip sustainable mining melalui pemanfaatan sumber daya mineral secara optimal dan berkelanjutan. Dengan demikian, metode blending direkomendasikan sebagai strategi pengelolaan sumber daya nikel yang efisien, ekonomis, dan ramah lingkungan, khususnya pada tambang laterit di wilayah Sorowako dan sekitarnya.
Co-Authors Abdul Salam Munir Abdullah, Muh. Agung Agus Ardianto Budiman Alam Budiman Thamsi Aldi Suryadi Alfian Nawir Alfian Nawir Alimuddin . Andi Artiningsih Andi Fahdli Heriansyah Angga Mulia, Muhammad Ilham Anshariah Anshariah Ardana, Muhammad Fabio Ardana, Rifal Arham Arif Nurwaskito Arif Nurwaskito Arif Nurwaskito Arifin, Mubdiana Arman, Muh Aulia, Rizky Nurul Baehaqi Bakri, Hasbi Bakri, Hasbi Basmuddin, Abdul Azis Chalik, Citra Aulian Citra Aulia Khalik Citra Aulian Chalik Dewy Kumala Tehuayo Dian Safitri Dian Safitri Edy Sanwani F. Firdaus Fadli Heriansyah, Andi Febrianty, Vanda Firdaus Firdaus F Firdaus, F. Firman Firman Firman Nullah Yusuf Fitria, Ade Nurul Furkani, Dian Gaffar, Abd Habibie Anwar Habiebie Anwar Harwan Harwan Harwan, Harwan Hasbi Bakri Husain, Hartina Idris Juradi, Muhammad Iksan, Muh. Imam Riswandi Jamal Rauf Husain Jefri, J Kurnia Ningsi Kusnaeni Kusnaeni, Kusnaeni Majid, Rafdi Abdul Miftah Farid Mochammad Imron Awalludin Mohammad Iqbal Muh Arman Muhammad Ainul Az Muhammad Anas Muhammad Aswadi Muhammad Fajrul Muhammad Rifki Nisardi Muhammad Zhaky Putra Muhdi, Irawan Mundiana, Arifin Mursit, Mursalat Nawir, Alfian Nur Asmiani Nurhalima Nurhawaisyah, Sitti Ratmi Nurhawaisyah, Sitti Ratmi Nurliah Jafar Nurliah Jafar, Nurliah Nurmalasari Nurmalasari Nurmalasari Nurwaskito, Arif oktaviani oktaviani oktaviani Prasetyawati Umar, Emi Prayitna, Yusri Putri Mutia Monica Rahmat Agam Putra Ratmi Nurhawaisyah, Sitti Sitti Ratmi Nurhawaisyah Sitti Riatmi Nurhawaisyah Sri Widodo Suaedi Syam, Nur Ilahi Syamsul Bakhri Syukrika Putri Syukrika Putri Takur, Takur Utami, Hesti Wakila, Muhammad Hardin Yusri Prayitna Zalsabila, Zalwa Zulfadli Zulfadli Zulkarnaen, Dina