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All Journal Dewantara Journal of Technology Prosiding Seminar Nasional Rekayasa Teknologi Industri dan Informasi ReTII Jurnal Sains dan Teknologi Globe: Publikasi Ilmu Teknik, Teknologi Kebumian, Ilmu Perkapalan Konstruksi: Publikasi Ilmu Teknik, Perencanaan Tata Ruang dan Teknik Sipil Venus: Jurnal Publikasi Rumpun Ilmu Teknik
Rety Winonazada
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Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Transportation

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Analisis Lama Waktu Pemanasan dan Rasio Komposisi Oli terhadap Peningkatan Kualitas Batubara menggunakan Metode Upgrading Brown Coal Ferry Samuel Maringan Siregar; Windhu Nugroho; Henny Magdalena; Agus Winarno; Rety Winonazada
Venus: Jurnal Publikasi Rumpun Ilmu Teknik  Vol. 4 No. 2 (2026): Venus: Jurnal Publikasi Rumpun Ilmu Teknik
Publisher : Asosiasi Riset Ilmu Teknik Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/venus.v4i2.1367

Abstract

Low-rank coal generally has a high moisture content, which results in a low calorific value and suboptimal quality for utilization as an energy source. One method that can be applied to improve coal quality is the Upgrading Brown Coal (UBC) process, which functions to reduce moisture content and increase fixed carbon value. This study aims to analyze the effect of heating time and the ratio of used oil composition on improving coal quality based on proximate parameters. The research method includes collecting coal samples from four locations in Samarinda and its surrounding areas, namely SMAN 1 Samarinda, Bhineka Street, Palaran Stadium, and Tani Bakti Village. The samples were analyzed using proximate analysis, including inherent moisture (IM), ash content (AC), volatile matter (VM), and fixed carbon (FC), both before and after the UBC process. The upgrading process was carried out with variations in heating time and used oil composition as a coating medium to enhance coal stability and prevent moisture reabsorption. The final results of the upgrading process showed the best values of inherent moisture at 13.64%, ash content at 4.66%, volatile matter at 55.06%, and fixed carbon at 44.94%. The results indicate that the UBC process is capable of reducing inherent moisture and increasing fixed carbon, thereby improving coal quality. Variations in heating time and used oil composition have a significant effect on changes in proximate parameters. Longer heating time and an appropriate ratio of used oil composition result in a more optimal improvement in coal quality.
Pengaruh Evaluasi Grade Serta Jari Jari Tikungan dan Superelevasi Terhadap Produktivitas Alat Angkut Overburden pada Pit Pinang PT Bukit Baiduri Tito Arie Ananta Mahendra; Agus Winarno; Rety Winonazada; Harjuni Hasan; Tommy Trides
Jurnal Sains dan Teknologi Vol. 5 No. 1 (2026): Juni : Jurnal Sains dan Teknologi
Publisher : Fakultas Teknik Universitas Cenderawasih

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58169/saintek.v5i1.1067

Abstract

PT. Bukit Baiduri Energi (BBE) is a coal mining company that utilizes hauling roads as the main infrastructure for material transportation. This study focuses on a 1.7 km road segment selected as the object of technical evaluation. The objective of this research is to analyze the effect of road geometry improvements on hauling time efficiency and equipment productivity. The method employed includes direct field measurements and calculations of operational parameters such as travel time, cycle time, and productivity. The results indicate that improvements in road grade reduced travel time from 10.13 minutes to 9.86 minutes. This reduction was followed by a decrease in cycle time from 16.29 minutes to 16.22 minutes. In addition, productivity increased from 65.4 bcm/hour to 66.69 bcm/hour. Also, improvements in curve radius and superelevation were implemented on the hauling road. These improvements resulted in a further decrease in travel time from 9.86 minutes to 8.6 minutes. Consequently, the cycle time also decreased from 16.22 minutes to 16.18 minutes. The productivity of hauling equipment increased from 66.69 bcm/hour to 67.02 bcm/hour. Overall, the evaluation of road geometry provided a positive contribution to operational performance. The productivity of overburden removal increased from 65.4 bcm/hour to 67.02 bcm/hour, representing an improvement of 2.48%.
The Analisis Pengaruh Temperatur Air pada Siklus Pengujian Slake Durability Terhadap Ketahanan dan Ukuran Butir Batuan Daerah Kutai Kartanegara Moh. Widzar Fahmi Widzar; Revia Oktaviani; Rety Winonazada; Tommy Trides; Albertus Juvensius Pontus
Dewantara Journal of Technology Vol. 5 No. 1 (2024)
Publisher : Akademi Teknologi Industri Dewantara Palopo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59563/djtech.v5i1.301

Abstract

Uji slake durability mampu memberikan gambaran mengenai tingkat kerusakan yang dialami batuan akibat siklus pengeringan dan pembasahan. Temperatur air merupakan salah satu variabel penting terhadap hasil uji slake durability, peningkatan temperatur air dapat mempercepat laju reaksi kimia dan fisik yang terjadi pada batuan selama proses pelapukan. Oleh karena itu, penelitian ini berupaya untuk menganalisis ketahanan dan pengaruh temperatur air pada siklus pengujian slake durability, batulempung dan batulanau dipilih karena memiliki ukuran butir yang berbeda yang nantinya akan dilakukan pengujian ukuran butir untuk mengetahui dominasi material dari setiap lokasi penelitian. Berdasarkan hasil penenlitian didapatkan hasil pengaruh index durability (Id2) terhadap temperatur air didapatkan pada sampel batulanau formasi Balikpapan pengaruh temperatur air sangat kuat dengan nilai (R2) 0.9998, formasi Pulau Balang pengaruh temperatur air kuat dengan nilai (R2) 0.9879, sedangkan sampel batulempung formasi Balikpapan pengaruh temperatur air cukup kuat dengan nilai (R2) 0,791, formasi Pulau Balang pengaruh temperatur air sangat kuat dengan nilai (R2) 0.9659. Untuk dominasi material pada lokasi penelitian didapatkan sampel batulanau formasi Balikpapan sebesar 60,17%, formasi Pulau Balang sebesar 61, 06% sedangkan sampel batulempung formasi Balikpapan sebesar 54,51%, dan formasi Pulau Balang sebesar 61,87%.
Pengaruh Daya Tampung Settling Pond untuk Pengendalian Air Tambang PT Victor Dua Tiga Mega, Barito Utara, Kalimantan Tengah M. Sohib Prabowo; Harjuni Hasan; Rety Winonazada; Shalaho Dina Devy; Windhu Nugroho
Konstruksi: Publikasi Ilmu Teknik, Perencanaan Tata Ruang dan Teknik Sipil Vol. 4 No. 3 (2026): Juli: Konstruksi: Publikasi Ilmu Teknik, Perencanaan Tata Ruang dan Teknik Sipi
Publisher : Asosiasi Riset Ilmu Teknik Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/konstruksi.v4i3.1505

Abstract

Settling pond is a mine water control facility used to temporarily store pumped mine water before it is discharged from the mining area. This study aimed to determine the storage capacity of the settling pond, evaluate the effect of pump discharge on its storage capacity, and develop a redesign to prevent overflow at Pit 7, Luwe Site, PT Victor Dua Tiga Mega, North Barito Regency, Central Kalimantan Province. The study employed field measurements of the settling pond geometry, pump discharge measurements using a flowmeter, sediment thickness measurements using the sounding method, and storage capacity analysis based on the Decree of the Minister of Energy and Mineral Resources No. 1827 K/30/MEM/2018. The results showed that the settling pond had a geometric capacity of 6,779.50 m³, while the incoming pump discharge reached 23,748.29 m³/day, indicating that the existing capacity was insufficient and had the potential to cause overflow. Based on the evaluation, the recommended pump discharge was 4,541.24 m³/day, accompanied by a redesigned three-compartment settling pond with a storage capacity of 24,400 m³, meeting the required capacity specified in the ministerial regulation.
Co-Authors Agus Winarno Albertus Juvensius Pontus Amarullah Amarullah Ardhan Ismail Berliani Wahyu Ningrum Brilliant Mercy Geometri Eghi Eghi Ferry Potik Kurniawan Ferry Samuel Maringan Siregar Harjuni Hasan Henny Magdalena Listiyawati Nugraha Lucia Litha Respati M. Sohib Prabowo Moh. Widzar Fahmi Widzar Muhammad Ashar Alias Suara Muhammad Rahul Shidiq Revia Oktaviani S. Koesnaryo Shalaho Dina Devy Tito Arie Ananta Mahendra Tommy Aria Pradana Tommy Trides windhu Nugroho Yuana Saputra