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All Journal APLIKA Jurnal Ilmu Pengetahuan dan Teknologi Journal of Degraded and Mining Lands Management Jurnal Chemurgy JOURNAL SCIENTIFIC OF MANDALIKA (JSM) Jurnal Sosial dan Teknologi Baselang: Jurnal Ilmu Pertanian, Peternakan, Perikanan dan Lingkungan Dinamika Lingkungan Indonesia Journal Transformation of Mandalika Journal of Comprehensive Science MINERAL Nusantara Civil Engineering Journal Jurnal Inovasi Global JURNAL TEKNOLOGI MINERAL FT UNMUL ANDIL Mulawarman Journal of Community Engagement Journal of Media, Sciences and Education
Harjuni Hasan
Jurusan Teknik Pertambangan, Fakultas Teknik, Universitas Mulawarman
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Physics Public Health Social Sciences Other

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Journal : Journal Transformation of Mandalika

 1 
STUDI PENCAMPURAN BATUBARA KUALIATAS RENDAH DENGAN ARANG GERGAJI KAYU SENGON PADA PROSES PEMBUATAN BRIKET Donal, Donal; Hasan, Harjuni; Agus Winarno; Nugroho, Windhu; Devy, Shalaho Dina
Journal Transformation of Mandalika, e-ISSN: 2745-5882, p-ISSN: 2962-2956 Vol. 2 No. 8 (2021): Agustus
Publisher : Institut Penelitian dan Pengembangan Mandalika Indonesia (IP2MI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36312/jtm.v2i8.974

Abstract

Tujuan dari penelitian ini adalah untuk mengetahui hasil analisis proksimate, uji kuat tekan dan penyalaan api serta laju pembakaran pada briket. Hasil penelitian menunjukkan bahwa jenis perekat dan biomassa berpengaruh nyata terhadap kadar air, kadar abu, zat mudah menguap, karbo tertambat, penyalaan api serta laju pembakaran, sedangkan tidak berpengaruh terhadap kerapatan dan kuat tekan. Perlakuan terbaik yang sesuai dengan standar SNI dari penelitian ini didapatkan dari perlakuan dengan komposisi 60% batubara : 40% arang sengon dan 50% batubara : 50% arang sengon dengan kode sampel KH dan KP perekat tepung tapioka. Briket dengan komposisi 60%batubara : 40% arang sengon kode sampel KH (Pulaubalang) yang dihasilkan dari perlakuan ini memiliki nilai kadar air 5,99 % ; kadar abu 6,92 % ; zat terbang 11,42%; kadar karbon tertambat 75,65%; laju pembakaran 3,74 g/menit ; nyala api 6 : 36 menit ; kerapatan 0,23 g/cm3 ; kuat tekan 38,22 kg/cm2. Briket dengan komposisi 50%batubara : 50% arang sengon kode sampel KP (Balikpapan) yang dihasilkan dari perlakuan ini memiliki nilai kadar air 6,96 % ; kadar abu 4,73 % ; zat terbang 11,92%; kadar karbon tertambat 76,39%; laju pembakaran 2,61 g/menit ; nyala api 6 : 57 menit ; kerapatan 0,21 g/cm3 ; kuat tekan 24.70 kg/cm2.
EVALUASI COAL RECOVERY PADA KEGIATAN PENAMBANGAN DARI PIT A MENUJU STOCKPILE DI PT. X (EVALUATION OF COAL RECOVERY IN MINING ACTIVITIES FROM PIT A TO STOCKPILE AT PT. X) Azzahra, Siti Maghfirah; Hasan, Harjuni; Oktaviani, Revia; Winarno, Agus; Respati, Lucia Litha
Journal Transformation of Mandalika, e-ISSN: 2745-5882, p-ISSN: 2962-2956 Vol. 3 No. 4 (2022): April
Publisher : Institut Penelitian dan Pengembangan Mandalika Indonesia (IP2MI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36312/jtm.v3i4.1138

Abstract

Several coal companies apply a minimum target of coal recovery. Coal recovery is a comparison between the actual tonnage of coal production based on the data from the weighbridge and the coal tonnage as a result of survey measurements expressed as a percentage. The greater the coal recovery more effective the coal was mined. Loss of coal during the mining process was unavoidable. However, if the cause is known in detail, the amount of loss can be minimized by making efforts to repair the existing causes and can increase the value of coal recovery and the utilization of coal reserves owned by the company. There are 30 coal mining data. 19 of them still had a coal recovery below 96% with a total tonnage loss of 1.485,97 tonnes. There are 6 activity criteria that cause coal recovery, including the coal getting less than optimal and still leaves coal on front which accounts for 47,45% of the total loss, coal used as road coating accounts for 5,67%, survey measurement data is less representative the appearance of coal shapes accounted for 2,48%, errors naming on coal haulage coupons accounted for 9,77%, waterlogged fronts accounted for 29,64%, and recleaning accounted for 5,01% of the total tonnage loss.
Co-Authors Adeliana Khairunisa, Aji Agus Winarno Agus Winarno Agus Winarno Agus Winarno, Agus Aipassa, Marlon Ivanhoe Albertus Juvensius Pontus Alfiyanda, Ahmad Azzahra, Siti Maghfirah Bandaso, Surya Bidang, Mayleni Devy, Shalaho Dina Dina Devy, Shalaho Dionisyus Fransiskus Sinaga Donal Donal Donal, Donal Edhi Sarwono Gerry Tri Virgin Gina Saptiani Graciella Jacob Hamzah Umar Henny Magdalena Hikmawati Ibrahim Ibrahim Ilham, Akbar Irvantoni Simbolon, Desron Jawatir Pardosi Jumsar A Juvensius Pontus , Albertus Juvensius Pontus, Albertus Kusnanto, Fransiska Angelina Lhita Respati, Lucia Litha Respati, Lucia Lucia Litha Respati Lumban Tobing Bill Rexy M. Rijal, M. Magdalena, Heny Megawati AP Milda Milda Miranda, Virgita Mushawir Mushawir Narius , Nugroho, Windhu Nurfaysa Pontus, Albertus Juvensius Respati, Lucia Litha Revia Oktaviani Rinto Syahreza Pahlevi Saeppudin, Ahmad Sakdillah Sakdillah A Sandri Tandi Rapang Satriana Aulia, Andi Sitepu, Joe Vandame Tommy Trides Tommy Trides Tommy Trides Toni, Toni Trides, Tommy Vandrianus Felix Feto Nuwa Wahyu Garini, Andini Dwi Warman, Neni Windhu Nugroho windhu Wiradhana, Ni Made Ayu Dwi Kartika Yauri Imanuel Tobak Yufita, Zaenul Zainuddin, Zainuddin