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Bakri, Suriyanto
Program Studi Teknik Pertambangan, Fakultas Teknologi Industri, Universitas Muslim Indonesia
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Journal : Journal of Engineering Science and Technology Applications

 1 
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.
Karakterisasi Fe₂O₃ Hasil Sintesis Hijau Menggunakan Ekstrak Buah Dengen (Dillenia serrata): Characterization of Fe₂O₃ from Green Synthesis Using Dengen Fruit Extract (Dillenia serrata) Nurmalasari; Nurhalima; Suaedi; Bakri, Suriyanto; Putri, Syukrika; Prayitna, Yusri
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.v2i2.204

Abstract

Fe₂O₃ has many functions, including as a pigment and as a semi-conductor material. The use of this material depends on its characteristics. In this study, the characterization of Fe₂O₃ nanoparticles produced from green synthesis was carried out. Dengen fruit extract was used as a chelating agent with iron sand raw material from the Pajallesang River, Palopo City. The synthesis was carried out using the sol-gel method at pH 4.7. The gel sample was calcined at temperatures of 600°C, 700°C, and 800°C, after which it was characterized using XRD and XRF. The average crystallite size of Fe₂O₃ particles in iron sand and after being synthesized at temperatures of 600°C, 700°C, and 800°C were respectively 40.09 nm, 36.67 nm, 31.46 nm, and 69.04 nm. The increase in calcination temperature affects the Fe₂O₃ content, where the higher the temperature used, the lower the Fe₂O₃ content obtained. The Fe₂O₃ content in iron sand and after synthesis at temperatures of 600°C, 700°C, and 800°C were respectively 70.4%, 91.04%, 90.01%, and 88.82%
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 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%
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.
Co-Authors Abdul Salam Munir Abdullah, Muh. Agung Adrianto Budiman, Agus Agus A 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 Budiman, Agus Ardianto Chalik, Citra Aulian Citra Aulia Khalik Citra Aulian Chalik Dewy Kumala Tehuayo Dian Safitri Edy Sanwani F. Firdaus Fadli Heriansyah, Andi Febrianty, Vanda Firdaus Firdaus F Firman Firman Firman Nullah Yusuf Fitria, Ade Nurul Gaffar, Abd Habibie Anwar Habiebie Anwar Harwan Harwan Harwan, Harwan Hasbi Bakri Idris Juradi, Muhammad Iksan, Muh. Imam Riswandi Jamal Rauf Husain Jefri, J Kurnia Ningsi Majid, Rafdi Abdul Miftah Farid Mochammad Imron Awalludin Mohammad Iqbal Muh Arman Muhammad Ainul Az Muhammad Anas Muhammad Aswadi Muhammad Fajrul Muhammad Rifki Nisardi 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 Rahmat Agam Putra Ratmi Nurhawaisyah, Sitti Sitti Ratmi Nurhawaisyah Sitti Riatmi Nurhawaisyah Sri Widodo Suaedi Syam, Nur Ilahi Syamsul Bakhri Syukrika Putri Takur, Takur Utami, Hesti Wakila, Muhammad Hardin Zalsabila, Zalwa Zulfadli Zulfadli Zulkarnaen, Dina