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 -
Introduction Concerns over air pollution and the environmental problem of acid rain have made governments all over the world tighten their regulations
The leachability tests for manufacturing scrap TV boards (STVB) have indicated the release of metals beyond the limit levels with potential problems f
Printed circuit boards (PCBs) from electronic gadgets at the end of their useful life period are currently being dumped in landfills or incinerated, c
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