Article Per Year (5 Year)
p-Index From 2020 - 2025
0.408
P-Index
This Author published in this journals
All Journal Journal of Metallurgical Engineering and Processing Technology Jurnal Teknologi Sumberdaya Mineral
Rangan, Frederico Espinoza
Unknown Affiliation
Chemical Engineering, Chemistry & Bioengineering Earth & Planetary Sciences Energy Engineering Materials Science & Nanotechnology Mechanical Engineering

Published : 2 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 2 Documents
Search

 1 
Effect of Application Rate on Gold Ore Extraction Process with Column Test Method at PT J Resources Bolaang Mongondow, North Sulawesi Rangan, Frederico Espinoza; Sudaryanto, Sudaryanto
Journal of Metallurgical Engineering and Processing Technology Vol 5, No 1 (August 2024)
Publisher : Universitas Pembangunan Nasional "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jmept.v5i1.12385

Abstract

PT J Resouces Bolaang Mongondow is engaged in gold processing with the heap leach process using the dynamic cell method. However, currently there will be a change to the static cell method so that it will affect the operational strategy including the application rate. Therefore, in this research, testwork was carried out to determine the best application rate to be used in the static cell process, studying the effect of application rate on leaching kinetics, percent gold extraction value, and cyanide consumption. The research stages include preparation and testing of head assay samples, leaching, and preparation and testing of tailings samples using the column test method. The application rate variations used were 20 L/m2 /h, a combination of 20 & 10 L/m2 /h, and 10 L/m2 /h. Pregnant leach solution obtained per day is checked for pH, free cyanide, and metal content analysis for the calculation of the percent extraction by back calculated. The results showed that the application rate of 20 L/m2 /h and the combination of 20 & 10 L/m2 /h had faster primary leaching kinetics than the application rate of 10 L/m2 /h. Analysis of the percent extraction of application rate 10 L/m2 /h has the highest percent extraction of 89% (0.2081 mg/L gold). Application rate also has an impact on cyanide consumption, where the application rate of 20 L/m2 /h has the highest cyanide consumption of 0.13 g/t. Meanwhile, the application rate combination of 20 & 10 L/m2 /h and 10 L/m2 /h had cyanide consumption of 0.081 g/t and 0.067 g/t, respectively. From the results, it is concluded that the best application rate is the combination of 20 & 10 L/m2 /h, judging from the leaching kinetics factor and the percent extraction obtained. On the other hand, the volume of solution produced is also less so that it can minimize the occurrence of landslides on the leach pad
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 SUDARYANTO SUDARYANTO Usman, Fahrul Rozzi Yanas, Yogi Gautama