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Bachtiar Effendi
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INDONESIA
Indonesian Mining Journal
Published by Balai Besar Pengujian Mineral dan Batubara tekMIRA
ISSN : 08549931     EISSN : 25278797     DOI : 10.30556/imj
Core Subject : Science, Social, Engineering,
Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Environmental Science Materials Science & Nanotechnology
This Journal is published periodically two times annually : April and October, containing papers of research and development for mineral and coal, including exploration, exploitation, processing, utilization, environment, economics and policy. The editors only accept relevant papers with the substance of this publication.
Arjuna Subject : Energi (semua kategori) - Energi (Lain-Lain)
Articles 269 Documents
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CHARACTERIZATION, BENEFICIATION, AND REES EXTRACTION OF COAL BOTTOM ASH Isyatun Rodliyah; Siti Rochani; Sariman Sariman; Suganal Suganal; Datin Fatia Umar; Pramusanto Pramusanto
Indonesian Mining Journal Vol 25 No 2 (2022): INDONESIAN MINING JOURNAL, Vol. 25 No. 2, October 2022
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/imj.Vol25.No2.2022.1343

Abstract

Rare earth elements are strategic materials. The elements have critical roles in meeting the needs of raw material for producing the modern industrial products. Most of the REE minerals is available in the form of associated minerals. One of them is coal. In terms of obtaining an overview regarding the possibility of coal to be a source of REEs, a research was carried out by beneficiating the bottom ash of the coal using a shaking table and a magnetic separator, and was followed by extracting the REEs using the alkaline fusion and leaching them using the nitric acid. The results showed that the bottom ash of gasified coal from the Palimanan pilot plant contained cerium, lanthanum, samarium, neodymium, praseodymium, europium, gadolinium, dysprosium, and yttrium, with a total content of 77.85 ppm. Concentrating the REEs using the shaking table and the magnetic separator result in a recovery of 32.96% and 50.5%, respectively. Extracting the REEs by alkaline fusion using NaOH as flux was not promising  while leaching with nitric acid was able to extract the REEs with various percentage extraction values, and the highest extraction for Neodymium was 73.46% under conditions of 2M nitric acid leaching and heated at 80°C.
APLIKASI METODE INDUCED POLARIZATION (IP) UNTUK MENGIDENTIFIKASI PENYEBARAN MINERAL LOGAM DI DAERAH LEON Elleona Septi Nugraheni; Y Yatini; Agus Santoso
Indonesian Mining Journal Vol 26 No 2 (2023): Indonesian Mining Journal, October 2023
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/imj.Vol26.No2.2023.1344

Abstract

The research was conducted in the Leon area to determine the presence and quantity of metallic mineral resources. The stratigraphy of the study area is composed of alluvium and coastal deposits, Molasa Sarasin Formation, Tinombo Formation, and Intrusion. Exploration was carried out in the Leon area using Induced Polarization Method with a dipole-dipole configuration with an area of ​​950 m2. The length of the track is 580 meters with a North-South orientation. The number of tracks in this study was 15, with spacing electrodes as far as 20 meters and n = 1-10. The analysis showed that the distribution of resistivity values ​​in the study area was from (13.6 to 1337) Ωm, while the chargeability values ​​had a range of values ​​(1.7 to 50.6) ms. The low resistivity values ​​below 50 Ωm are interpreted as claystone to sandstone and the medium resistivity values ​​between 50 Ωm - 500 Ωm are interpreted as compact sandstone to breccia. The resistivity values ​​above 500 Ωm are interpreted as igneous rock. The presence of metallic minerals in the study area is characterized by changeability values ​​above 22 ms in claystone, sandstone, breccia, and igneous rock. Calculating hypothetical resources was conducted the Block model method at Oasis Montaj that obtained 11.8 million tons of resources.
ANALYSIS OF EXPLOSIVE ENERGY DISTRIBUTION AT PIT 7 WEST PT. MAKMUR MANDIRI UTAMA BINUNGAN SUARAN - BERAU, EAST KALIMANTAN PROVINCE Mulya Gusman; Fellya Septia Fauzi; Andree Octova
Indonesian Mining Journal Vol 25 No 2 (2022): INDONESIAN MINING JOURNAL, Vol. 25 No. 2, October 2022
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/imj.Vol25.No2.2022.1346

Abstract

Blasting geometry and blasting material filling are closely related to the rock mass characteristics and the geological conditions to obtain ideal fragmentation. Blastability Index analysis, including Description of Rock Mass, Combined Plane Spacing, Combined Plane Orientation, Specific Gravity Influencey, and Hardness, are the alternative geometry experiment conducted to overcome the problem of rock fragmentation so that the speed of excavation equipment can increase according to the productivity of Komatsu PC2000 plan at PT. BUMA Jobsite BINSUA. Furthermore, the actual rock values obtained from blasting location and alternative geometry recommendations using R.L.Ash theory combined with Vertical Energy Distribution theory. In the C2 layer with a rock factor value of 5.95, the recommended load is 7.2 m, space is 8.3 m, and the VED explosive power is 48%. In layer D2 the rock factor value is 6.89 with a load of 7.5 m, space of 8.3 m, and 55% VED explosive charge. While in the DU layer, the rock factor value is 6.39 with a load of 7.3 m, 8.4 m space, and 51% VED filling of explosives. Prediction of blasting fragmentation analysis using Kuz-ram theory obtained fragmentation > 100 cm, namely 14.99% for the C2 layer, 14.84% for the D2 layer, and 14.82% for the DU layer.
KAJIAN PEMASOKAN-KEBUTUHAN ASPAL BUTON INDONESIA Agus Miswanto; Ijang Suherman; Triswan Suseno; Willy Pravianto
Indonesian Mining Journal Vol 26 No 1 (2023): Indonesian Mining Journal, April 2023
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/imj.Vol26.No1.2023.1364

Abstract

National asphalt that was needed around 1.2 million tons per year are fulfilled by Pertamina's oil asphalt production around 272,040 tons (22.27%).  Such a production is related to US$283.77 million, Indonesian natural asphalt (Asbuton) from Buton around 21,226 tons (1.74%) that is worth US$9.13 million. Its shortfall was met by the an import of 945,180 tons (77.39%) that is worth of US$473.77 million. The Asbuton resources are enormous around 792.5 million tons and its reserve is approximately 182.65 million tons. There are 16 Asbuton processing factories with the total capacity of roughly 2.03 million tons per year. However, their production is still 43,128 tons per year. It means the production utility is only 2.1% of the total production capacity. This study aims to optimize the use of Asbuton. Secondary data is obtained from various agencies, official websites, research reports, journals, and sharing sessions. Data analysis using an econometric model with a simple linear regression equation. The results show that the import substitution program starts in 2023, where the national asphalt needs are 935,180 tons, and its production is 253,473 tons and its import substitution in the first year is gradually around 96,061 tons, which means that the will be 585,647 tons so that the country can save foreign exchange of US $ 65.66 million. In 2031, substitution has exceeded the imports number, result and the excess capacity, thus opening up the export opportunities of 96,060 tons. Referring to such condition, the country can get additional income around US$656.59 million. This situation will continue until the end of the projection year in 2045.
Abstract Indext Tatang Wahyudi
Indonesian Mining Journal Vol 25 No 2 (2022): INDONESIAN MINING JOURNAL, Vol. 25 No. 2, October 2022
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/imj.Vol25.No2.2022.1433

Abstract

STUDI PENDAHULUAN: EKSTRAKSI LITIUM DARI FLUIDA PANAS BUMI DIENG MELALUI EKSTRAKSI PELARUT Agus Wahyudi; Andina Septiarani; Hairunnisa; Isyatun Rodliyah
Indonesian Mining Journal Vol 26 No 1 (2023): Indonesian Mining Journal, April 2023
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/imj.Vol26.No1.2023.1477

Abstract

This preliminary study aims to obtain the lithium compounds from a geothermal brine through a solvent extraction. The brine samples were collected from PT Geodipa Energi Geothermal Power Plant in Dieng, Central Java, Indonesia. The ICP analysis was conducted to measure brine chemical composition. Brine’s lithium content was 62.73 ppm with the dominant impurities silica (Si), calcium (Ca), potassium (K), sodium (Na), and boron (B). Silica removal was conducted by centrifugation technic with the addition of flocculants, while calcium removal was achieved by adding sodium carbonate. The CYANEX® 936P was used for the extraction process and was diluted in kerosene (1:1 O/A ratio). The extraction pH was adjusted by adding 10% H2SO4 solution (acid condition) and 10% NH4OH (alkaline condition). The optimum condition for lithium extraction was observed at pH = 11, with the highest lithium recovery of 90%. The eluate from the stripping process was then precipitated by adding Na2CO3 to produce lithium carbonate powder.
DAMPAK HASIL PELEDAKAN DENGAN DETONATOR ELEKTRONIK MENGGUNAKAN METODE SEGMENTASI DAN NON-SEGMENTASI Raden Haris Handayana; Mohamad Rifki Alghifari; Sani Salahudin; Nasfryzal Carlo
Indonesian Mining Journal Vol 26 No 2 (2023): Indonesian Mining Journal, October 2023
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/imj.Vol26.No2.2023.1488

Abstract

Sebuku Tanjung Coal, a mining company, has a blasting location close tobuilding structures. This building is included in the Class 2 building on SNI 7571:2010 with a maximum peak vector sum (PVS) value of 3 mm/s or peak particle velocity (PPV) value of 3 - 7 mm/s at the frequency of 0-100 Hz. Several critical areas are located between 200 and 700 meters from the blasting location. The used initiation system is Hanwha Electronic Blasting System 2nd Generation (HEBS II), which uses HiMex 70 (emulsion) as an explosive type. In this paper, the tie-up design of blasting uses segment and non-segment methods to compare the results of blasting using the two methods. Based on 16 compared data points, the vibration results obtained using segment and non-segment had a value range of 2,767-15,102 mm/s. The average result of the digging time using the segment method is 10.9 seconds, while the non-segment method takes 10.3 seconds. The average size of fragmentation (D80) with the segment method is 49.1 cm, while the non-segment method is 45.4 cm.
Dari Editor
Indonesian Mining Journal Vol 26 No 1 (2023): Indonesian Mining Journal, April 2023
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

KAJIAN BATU TERBANG UNTUK MENENTUKAN JARAK AMAN MINIMUM PELEDAKAN LAPISAN PENUTUP BATUBARA TERHADAP WILAYAH PERMUKIMAN Raden Haris Handayana; Fajar Shodik; Sani Salahudin
Indonesian Mining Journal Vol 26 No 2 (2023): Indonesian Mining Journal, October 2023
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/imj.Vol26.No2.2023.1498

Abstract

Fly rock is a rock fragmentation that is thrown as a result of blasting. Such fragmentation that is thrown beyond the specified safe distance can cause a damage to the infrastructure, mechanical equipment and humans. This study aims to determine the safe radius of the fly rock that resulting from blasting residential area which that has a distance 200-300 m and has potentially distressing to cause damage. Calculating of the flying rock throwing distance is carried out theoretically and actually with orientation to the distance between spaces, the distance between burdens, minimum stemming height, minimum hole depth, powder factor, average charge blast hole and distance initial burdens. For theoretical calculations, the save distance is calculated by empirical methods and dimensional analysis. Results of the study shows that the maximum distance of the actual fly rock throw is 05.31 m and based on the predictions using the Cratering Method, the maximum distance of fly rocks is 172 m with a safety factor of 2 and the maximum distance of fly rocks is 199.04 m with a safety factor of 2. Based on the actual and predicted data above, it is not safe for blasting locations that is less than 200 m from residential areas, that refers to the safe radius threshold based on the regulation of the Minister of Energy and Mineral Resources No. 1827 K/30/MEM/2018.
PENGARUH MODIFIKASI SUHU PEMANASAN PADA KUALITAS CAMPURAN GLASIR BASALT UNTUK KERAMIK TEMBIKAR David Candra Birawidha; Jihan Fhara Amanda; Syafriadi; Muhammad Amin; Evi Dwi Yanti; Indah Pratiwi; Wirdatul Jannah
Indonesian Mining Journal Vol 26 No 2 (2023): Indonesian Mining Journal, October 2023
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/imj.Vol26.No2.2023.1527

Abstract

Research has been conducted on the effect of temperature variations on basalt-based glaze mixtures for stoneware ceramic applications using temperature variations of 1100, 1200, and 1300°C. This research aims to determine the optimum temperature for the best quality basalt glaze. The glaze sample was made using raw materials of asalt, kaolin, and feldspar their composition around 60%, 10%, and 30% wts respectively performing their grain sizes under 100 mesh. Material characterization was carried out by analyzing their XRF, XRD, and optical microscopy. At a burning temperature of 1200oC, the basalt-based glaze mixture significantly influences the structure and changes of glaze on the surface of the specimen from a macro-structural perspective. At the temperature of 1200°C, the glaze layer has reached the perfect melting point and coats the specimen surface evenly and results in not easily cracked and broken. It was proven that the glaze liquid could penetrate the pores, completely covering the surface morphology of the test object. Regarding the multitude of colors formed at temperature of 1200°C, it can optimize the content of dye metals such as iron, manganese, and cobalt in the glaze materials.

Page 25 of 27 | Total Record : 269

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