Yongcheng Zhou, Wenping Chen
Direct cyanide leaching of high-carbon gold ores typically results in poor gold extraction due to the “preg-robbing” effect of carbonaceous matter. This study investigates a refractory high-carbon gold ore from Laos. Based on detailed process mineralogy that identified the occurrence state of gold and the distribution of harmful impurities, a combined process consisting of flotation pre-concentration, oxidative roasting, and a Mill–Leach Coordination (MCL) process was developed. The MCL process, which integrates simultaneous grinding and leaching, continuously renews the particle surface and eliminates product-layer diffusion resistance, thereby significantly enhancing gold dissolution efficiency. Kinetic studies demonstrate that the leaching reaction follows the Avrami model and is controlled by internal diffusion, with a derived semi-empirical kinetic equation. This research provides a novel and efficient technical route for treating high-carbon gold ores and offers theoretical guidance for industrial scale-up.
@article{c4989c6b-98b1-4b2d-a2ff-50a209eeb487,
title={A Study on the Combined Flotation–Roasting–Leaching Process for Treating High-Carbon Gold Ore and Its Kinetics},
author={Yongcheng Zhou and Wenping Chen},
year={2026},
language={en}
}TY - JOUR TI - A Study on the Combined Flotation–Roasting–Leaching Process for Treating High-Carbon Gold Ore and Its Kinetics AU - Yongcheng Zhou AU - Wenping Chen PY - 2026 LA - en ER -
FATHI HABASHI
In the past few years, extractive metallurgy has been advancing gradually, despite the absence of remarkable new ideas. This paper aims to summarize t
Printed circuit boards (PCBs) from electronic gadgets at the end of their useful life period are currently being dumped in landfills or incinerated, c
The leachability tests for manufacturing scrap TV boards (STVB) have indicated the release of metals beyond the limit levels with potential problems f
Introduction Concerns over air pollution and the environmental problem of acid rain have made governments all over the world tighten their regulations