Journal of Applied Science and Engineering

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Solihin1,2This email address is being protected from spambots. You need JavaScript enabled to view it., Ildrem Syafri2, Mega Fatimah Rosana2, R. Febri Hirnawan2, Dono Guntoro1, Andrieanto Nurrochman1, and Agus Purwanto3

1Department of Mining Engineering, Faculty of Engineering, Bandung Islamic University,Jl. Tamansari, No. 1, Bandung, Indonesia

2Faculty of Geological Engineering, Padjadjaran University, Jl. Raya Bandung Sumedang, KM 21, Jatinangor, Sumedang, Indonesia

3PT Bumi Suksesindo, Dusun Pancer, Desa Sumberagung, Pesanggaran, Banyuwangi, East Java, Indonesia



Received: October 25, 2023
Accepted: January 28, 2024
Publication Date: April 14, 2024

 Copyright The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.

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The characteristic of altered epithermal gold ore is largely determined by the associated minerals and accompanying primary and secondary minerals. Given the different characteristics of the altered epithermal gold ore, this study aimed to determine the optimal recovery value, including the consumption of NaCN and Portland cement. This research uses gold ore samples with a content of 0.94-0.24 ppm Au originating from hydrothermal deposits between intermediate high sulfidation and high sulfidation epithermal located in the argillic and advanced argillic alteration zones. Metallurgical testing was carried out using a pulverized bottle roll test (PBRT) with variations in the grain size fraction of the ore, NaCN concentration, and leaching time. PBRT showed that the gold ore samples originating from the advanced argillic alteration zone gave the optimum cumulative recovery values of Au for 79.11 - 91, 70% (at a cyanide concentration of 500 ppm and P80 (100 mesh). Meanwhile, the hydrothermally altered argillic zone sample gave the optimum recovery value of Au for 71.30-80.00% (at a cyanide concentration of 500 ppm and P80 (100 mesh). The gold ore sample in the moderate hydrothermal alteration zone has provided optimum recovery of Au for 72.14 - 79.79% (at a cyanide concentration of 500 ppm and P80 (100 mesh). From this research, mineral character and Cu > 600 ppm influence the leaching rate and Au recovery. This is because, in the primary gold ore deposition (genesis) system, Cu is usually associated with sulfur to form sulfide ore, which in cyanidation leaching extraction is a pregrobber.

Keywords: gold ore, alteration, hydrothermal, heap leach

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