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All Journal Specta Journal of Technology Jurnal Teknologi Sumberdaya Mineral
Yanas, Yogi Gautama
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Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Environmental Science

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Pengaruh Treatment Aerasi dan Ukuran Bijih terhadap Persen Ekstraksi Emas dengan Metode Agitation Leach Test Arief, Arief Rakhman Hakim; Wahyuningsih, Tri; Ravi'i; Yanas, Yogi Gautama; Usman, Fahrul Rozzi
SPECTA Journal of Technology Vol. 7 No. 3 (2023): SPECTA Journal of Technology
Publisher : LPPM ITK

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35718/specta.v7i3.825

Abstract

Generally, gold processing in the world is carried out through a leaching process to extract its gold content. One of the techniques commonly used in melindi gold ore, especially those with low grades, is the heap leaching method. One of the companies that manages gold with this technique is PT J Resources Bolaang Mongondow. In the heap leaching process at PT J Resources Bolaang Mongondow, there are several parameters that determine the final result of this process, including the concentration of dissolved oxygen and the size of the ore. This study aims to see the effect of aeration and ore size on percent gold extraction through the principle of leaching with the agitation leach test. This study used gold oxide ores with sizes of +6 and -6 mm. The two measures were each subjected to aeration and non-aeration treatment in the leaching process for 48 hours. From the results of experiments that have been carried out, it was found that the highest percent of extraction was produced at a size of +6 mm with a non-aeration treatment of 90%. While at a size of -6 mm, the highest percentage of extraction was obtained in aeration treatment of 84%. After data analysis, it was found that these results are highly dependent on oxygen levels and base metal content in the leaching process.
Analisis Pendekatan Nilai %Ekstraksi Ore North Mainrigde Dengan Metode Bottle Roller Test Di PT. J Resources Bolaang Mongondow Rangan, Frederico Espinoza; Yanas, Yogi Gautama; Usman, Fahrul Rozzi
Jurnal Teknologi Sumberdaya Mineral Vol. 5 No. 1 (2024)
Publisher : Program Studi Teknik Pertambangan Fakultas Teknik Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/jeneral.v5i1.45633

Abstract

The heap leach method is one of the cyanidation processes suitable for low-grade ore and PT J Resources Bolaang Mongondow uses this method in its processing. Column test is the most representative testwork of the heap leach process, but this testwork requires a long time so a faster testwork is needed and can provide %extraction value even though it is less representative and bottle roll test (BRT) is a solution for this. This study aims to estimate the % extraction obtained in cells by the BRT method. From the experimental results, it was obtained that the %extraction value of HG 01 samples at +12, +6, and -6 sizes was 67.1%, 79.2%, and 92.4%, respectively. for LG 02 samples of 68.3%, 81.5%, and 93.9%, for LG 03 samples of 54.5%, 90.6%, and 89.6%, respectively, these three samples are categorized as med-high extraction. While the LG 04 sample was 67.3%, 66.3%, 84.8% and categorized as low extraction.
Co-Authors Arief, Arief Rakhman Hakim Rangan, Frederico Espinoza Ravi'i Tri Wahyuningsih Usman, Fahrul Rozzi