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Jurnal Teknologi Mineral dan Batubara
Published by Balai Besar Pengujian Mineral dan Batubara tekMIRA
ISSN : 25278789     EISSN : 19796560     DOI : 10.30556/jtmb
Core Subject : Science, Social, Engineering,
Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Environmental Science Materials Science & Nanotechnology
Jurnal Teknologi Mineral dan Batubara adalah Jurnal yang diterbitkan oleh Pusat Penelitian dan Pengembangan Teknologi Mineral dan Batubara (Puslitbang tekMIRA). Jurnal Teknologi Mineral dan Batubara terbit pada bulan Januari, Mei, September, memuat karya-karya ilmiah yang berkaitan dengan litbang mineral dan batubara mulai dari eksplorasi, eksploitasi, pengolahan, ekstraksi, pemanfaatan, lingkungan, kebijakan dan keekonomian termasuk ulasan ilmiah terkait.
Arjuna Subject : Energi (semua kategori) - Energi (Lain-Lain)
Articles 257 Documents
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KARAKTERISTIK ABU LAYANG (FLY ASH) DARI PLTU TANJUNG SELOR DAN POTENSINYA SEBAGAI PREKURSOR MATERIAL ALUMINOSILIKAT Nur Hayati; Fildzah ‘Adany; Crhistine Dyta Nugraeni; Iif Ahmad Syarif; Riskaviana Kurniawati
Jurnal Teknologi Mineral dan Batubara Vol 19 No 3 (2023): Jurnal Teknologi Mineral dan Batubara Edisi September 2023
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/jtmb.Vol19.No3.2023.1499

Abstract

Around 500 million tonnes of coal combustion by-products are produced annually, with Fly Ash accounting for about 70% of the by-product. Therefore, using Fly Ash is crucial because if it is not processed and utilized correctly, it can harm the environment and human health. The use of Fly Ash is strongly influenced by its characteristics, which are different for each source because it depends on the type of coal, combustion, and cooling conditions. Therefore, characterization was carried out in this study using XRF and XRD on Fly Ash from Tanjung Selor PLTU. Based on ASTM C618, PLTU Fly Ash Tanjung Selor is class F Fly Ash because the amount of SiO2+Al2O3+Fe2O3 is 71,4% (>70%) and the amount of CaO is 13,83% (<15%). The XRD results also show that Fe2O3 and SiO2 dominate the Fly Ash with the appearance of the peak of Fe2O3 (hematite) at 2θ = 33,44; 35,57; 43,27° (PDF 01-073-0603) and SiO2 (quartz) at 2θ = 20,81; 26,63; 50,14; 57,26; 68,34° (PDF 01-085-0335). The characteristics of this Fly Ash indicate that it has the potential as a precursor for the synthesis of zeolite X and P because it has a SiO2/Al2O3 ratio of 1,63. In addition, due to the dominant Si and Al content, Fly Ash has the potential as a geopolymer precursor; the dominant Fe content (27%) can also increase the geopolymer's development strength.
VALIDITAS HASIL PENGUJIAN KADAR TIMBAL SECARA KOMPLEKSOMETRI TERHADAP MODIFIKASI TEKNIK PREPARASI DALAM PRODUK KONSENTRAT TIMBAL SULFIDA Yesaya Aprillianto; Arie Hardian; Herawati; Ardina Purnama Tirta
Jurnal Teknologi Mineral dan Batubara Vol 19 No 3 (2023): Jurnal Teknologi Mineral dan Batubara Edisi September 2023
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/jtmb.Vol19.No3.2023.1507

Abstract

Lead sulfide (PbS) concentrate is derived from the sulfide mineral galena. In nature, galena must first undergo a concentration process to become PbS concentrate. The determination of lead (Pb) content in the PbS concentrate is carried out using complexometric methods, referring to the modified ISO 13545:2000 standard during the preparation stage. In this research, the validity of the test results was assessed using several parameters, including precision test (repeatability and reproducibility), accuracy (%recovery) and estimation of measurement uncertainty. Certified reference material (CRM) Pb353, with a Pb content range of 58.20-64.33% was used as a sample in this study. The results showed an average Pb content of 61.11% for analyst A and 61.00% for analyst B in CRM Pb353. The research successfully met the precision testing requirements for repeatability (RSD 0.46% for analyst A and 0.39% for analyst B < 2/3 coefficient variance (CV) Horwitz 1.44%) and reproducibility (F-test 1.34 < F-table 4,28 and P-value 0.37 > significance level 0.05). Accuracy was also demonstrated with %recovery (analyst A 9.06–100.53% and analyst B 99.23–99.98%), as well as the estimation of measurement uncertainty (μrelative 2.27% < 5%). Therefore, the determination of Pb content using complexometric methods with modified preparation techniques in the PbS concentrate ensures the validity of the results.
STUDI PERBANDINGAN PROSES PELINDIAN UNTUK EKSTRAKSI SKANDIUM DARI TERAK RESIDU BAUKSIT Sariman; Siti Rochani; Nuryadi Saleh; Isyatun Rodliyah; Erika Arum Dianawati; Retno Wijayanti
Jurnal Teknologi Mineral dan Batubara Vol 19 No 3 (2023): Jurnal Teknologi Mineral dan Batubara Edisi September 2023
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/jtmb.Vol19.No3.2023.1509

Abstract

Scandium is classified as a rare earth element. Its existences are geochemically in small amounts as associate minerals. Consequently, scandium production is minimally from processing residues of major minerals. Indonesia has large bauxite deposits, and it is processed into alumina, producing bauxite residue as a by-product. The bauxite residue contains rare earth metals, including scandium. In this study, various ways of extracting scandium from bauxite residue slag were carried out. The bauxite residue beneficiation process was done through a smelting reduction process followed by magnetic separation. Scandium extractions were carried out from the bauxite residue slag through a leaching process with concentrated sulfuric, sulfation, alkali fusion, and a 2-stage acid leaching. The best percentage of scandium extracted was obtained at 88.40%, using the 2-stage acid leaching at the acid concentration of 500 g/kg, the temperature of 90oC, and the leaching time at 3 hours for each leaching stage. In addition, the best neodymium extracted achieved  76,97%, using the alkali fusion, fused in NaOH at 700oC for 3 hours.
PEMANFAATAN BATU APUNG SEBAGAI ADSORBEN DALAM APLIKASI KOLOM ADSORPSI UNTUK PENYISIHAN LOGAM KROMIUM DARI AIR TANAH Shinta Indah; Denny Helard; Febbi Herdiani
Jurnal Teknologi Mineral dan Batubara Vol 20 No 1 (2024): Jurnal Teknologi Mineral dan Batubara Edisi Januari 2024
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/jtmb.Vol20.No1.2024.1510

Abstract

The utilization of pumice as an adsorbent has been tested in adsorption column applications in removing chromium (Cr) from groundwater. The pumice was taken from the banks of the Pasak River, Pariaman, West Sumatra. The column used is made of glass with 130 cm in height and 2,6 cm in diameter. The experiment was carried out by varying the bed height (65, 75, and 85 cm) and the influent flow rate (2, 3, and 4 gpm/ft2), while the influent concentration used was according to the groundwater sample conditions. The concentration of Cr was analyzed using inductively coupled plasma emission (ICPE). The performance of the adsorption column can be evaluated from the breakthrough curve, which is a plot between the Ct/C0 ratio and the sampling time. The experimental results showed that the optimum condition with the highest removal efficiency of 65.15% and an adsorption capacity of 0.0031 mg/g were obtained at a bed height of 85 cm and an influent flow rate of 2 gpm/ft2. Based on the experimental results, it was concluded that Cr removal efficiency increased as the influent flow rate decreased and as the bed height of adsorbent increased. The adsorption column with Sungai Pasak Pariaman pumice as an adsorbent has potential to be applied in removing Cr metal from groundwater.
PENINGKATAN PERSEN EKSTRAKSI PROSES PELINDIAN EMAS DAN PERAK MENGGUNAKAN VARIASI TEKNIK PENINGKATAN OKSIGEN TERLARUT SPARGER LANCE, PEROXIDE INJECTION DAN HIGH SHEAR REACTOR Dikri Fajar Ramadhan; Imelda Eva Roturena Hutabarat; Denny Lumban Raja; Sulaeman
Jurnal Teknologi Mineral dan Batubara Vol 20 No 1 (2024): Jurnal Teknologi Mineral dan Batubara Edisi Januari 2024
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/jtmb.Vol20.No1.2024.1512

Abstract

Cyanidation leaching has become the most intriguing technique for extracting gold and silver. In the gold and silver cyanidation process, PT Indo Muro Kencana (IMK) implements three (3) dissolved oxygen (DO) enhancement techniques. The concentration of DO typically becomes the limiting factor in the gold cyanidation process. The use of a pressurized system can also increase the DO concentration in water. Oxygen injection techniques with a sparger lance (standard/STD), peroxide injection (PRX), and high shear reactor (Aachen assisted leach/AAL) are employed to optimize the cyanidation process due to the increasingly complex characteristics of the processed ore since 2021. The use of a high shear reactor is the latest technique implemented since April 2022, following the previous implementation of peroxide injection and sparger lance by PT IMK. The objective of this study is to determine the extraction percentage and its stability in producing extraction percentages with different ore compositions. The oxygen used for each technique is the same, approximately 548 kg/hour flow rate, 90%-93% purity, and 4-6 KPa pressure. A series of leach tests are conducted to observe the extraction percentage of gold and silver. Based on the conducted tests, the reactor high shear technique yields the highest extraction percentages for gold and silver, namely 97.06% and 82.82% respectively. Leaching with the high shear reactor technique resulted in a higher percent extraction stability than the leaching process using the other two techniques.
OPTIMASI PERSEN BINDER, BEBAN KOMPAKSI, DAN SUHU SINTERING DALAM PEMBUATAN BATU BATA TINGGI ALUMINA MENGGUNAKAN APLIKASI RSM (RESPONSE SURFACE METHODOLOGY) Erika Arum Dianawati; Phichiato Sirait; Aditya Wibawa; Husaini; Putu Teta Prihartini Aryanti
Jurnal Teknologi Mineral dan Batubara Vol 20 No 1 (2024): Jurnal Teknologi Mineral dan Batubara Edisi Januari 2024
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/jtmb.Vol20.No1.2024.1522

Abstract

PT Indonesia Chemical Alumina (ICA) is a company that produces 300,000 tons of chemical grade alumina (CGA) per year. Of this amount, there is an average of 15,000 tons that do not meet market specifications every year. Alumina that does not meet this specification is only piled up by PT. ICA and takes up space, so it is economically detrimental to the company because they have to provide space to accommodate it. In fact, this alumina has a very high Al2O3 content and is in the form of an alpha phase or α-Al2O3 which is the most stable phase at the highest temperatures, so it can be processed into useful materials and has high added value such as high alumina bricks through compaction and sintering. Process conditions such as percent binder, load during compaction and sintering temperature greatly affect the quality of the high alumina bricks produced. The purpose of this study is to optimize the process conditions for making high-alumina bricks by identifying the relationship between input variables and the measured responses and developing a prediction model for experimental variations that will be used in optimizing the process conditions for the manufacture of high alumina bricks. The Design Expert 7.0® program with Box-Behnken Design Response Surface Methodology (RSM) is used to research and select process conditions from a combination of factor levels that produce an optimal response. Based on RSM Box-Behnken Design it is known that the main effects of binder percentage, compaction load and sintering temperature are factors that greatly influence the response value of high alumina bricks. The optimal response value for high alumina bricks is a compressive strength of 8.2229 MPa, with a process condition of 3% binder percent, a compacting load of 10 tons and a sintering temperature of 1600ºC.
PEMETAAN SEBARAN MINERAL HEMATIT (Fe2O3) PADA ENDAPAN BAUKSIT DI KECAMATAN SANDAI, KALIMANTAN BARAT Yoga Abdul Malik Putra; Muhardi; Radhitya Perdana
Jurnal Teknologi Mineral dan Batubara Vol 20 No 1 (2024): Jurnal Teknologi Mineral dan Batubara Edisi Januari 2024
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

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

Abstract

Hematite (Fe2O3) is one of the minerals in bauxite deposits with a content of 20-45%. Estimation of hematite (Fe2O3) distribution over a large area with limited sample availability can be conducted using the interpolation method. This study aims to map and estimate the distribution of hematite (Fe2O3), ore thickness, and overburden thickness at Bukit Zahra, Sandai District, Ketapang Regency, West Kalimantan Province. The interpolation method in this study uses the inverse distance weighted (IDW) method, while the power test uses the calculation of the smallest root mean squared error (RMSE). The estimation results show the highest hematite (Fe2O3) content in the bauxite deposit of 20-25% is located at an elevation of 22-62 m, while the lowest hematite (Fe2O3) content of 0-6% is located at an elevation of 22-30 m. The mapping results show a maximum ore thickness of 7-9 m at an elevation of 46-62 m, while the minimum ore thickness of 0-1 m is at an elevation of 22-54 m. The maximum thickness of overburden is 6-8 m at an elevation of 38-46 m, while the minimum thickness of overburden is 0-1 m at an elevation of 22-62 m. The mapping results also show that the distribution of hematite (Fe2O3), ore, and overburden in the research site is on a gentle to steep slope.

Page 26 of 26 | Total Record : 257

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