真空焙烧预处理过程中温度对碳质金矿石中有机碳“抢胎”能力的影响——以无烟煤为例

IF 2.3 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY
JOM Pub Date : 2025-08-07 DOI:10.1007/s11837-025-07602-w
Xinwei Zhang, Yonghui Song, Jiaoe Dang, Teng Li, Wenlong Huang, Ning Yin
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引用次数: 0

摘要

在本研究中,无烟煤与碳质金矿有机碳的“劫胎”特征最为相似,以无烟煤为有机碳模型进行了真空焙烧实验,探讨了真空焙烧过程中温度对碳质金矿有机碳“劫胎”能力的影响。采用不同的分析方法对无烟煤的孔隙结构、官能团和碳结构的变化进行了表征。结果表明,无烟煤在真空焙烧过程中发生了热分解。无烟煤对金的吸附率从97.48%(800℃)急剧下降到4.67%(1200℃),是其“抢孕”能力的主要变化阶段。在整个焙烧过程中,无烟煤的形态和孔隙结构没有发生明显变化,官能团的快速消失主要发生在800℃以下。这些结果都表明,无烟煤“抢胎”能力的变化不是由其孔隙结构或官能团引起的。无烟煤碳结构的变化与其“抢胎”能力的变化是一致的。在800℃左右,无烟煤进入石墨化过程,随着温度的升高,内部碳结构逐渐由无序状态变为有序状态。随着石墨化程度的增加,吸附金的能力降低。真空焙烧过程中碳结构由无序态向有序态的转变可能是有机碳“抢胎”能力下降的关键原因。该研究建立了石墨化程度与劫孕能力降低之间的直接关系,为优化难处理矿石的金回收率提供了新的策略。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Effects of Temperature on the “Preg-Robbing” Ability of Organic Carbon in Carbonaceous Gold Ore During Vacuum Roasting Pretreatment: Anthracite as a Model

In this study, anthracite has the most similar “preg-robbing” characteristics to the organic carbon of carbonaceous gold ore. Vacuum roasting experiments were conducted on anthracite as a model of organic carbon to investigate the impact of temperature on the “preg-robbing” ability of organic carbon in carbonaceous gold ore during the vacuum roasting process. The changes in the pore structure, functional groups and carbon structure of anthracite were characterized using different analysis methods. The results showed that the anthracite thermal decomposed in the vacuum roasting process. The gold adsorption rate of anthracite decreased sharply from 97.48% (800 °C) to 4.67% (1200 °C), representing the main change stage of its “preg-robbing” ability. The morphology and pore structure of anthracite had no obvious change during the whole roasting process, the rapid disappearance of anthracite functional groups mainly occurred below 800 °C. These results all suggested that the “preg-robbing” ability change of anthracite was not caused by its pore structure or functional groups. The change in anthracite’s carbon structure was consistent with the change in its “preg-robbing” ability. The anthracite entered the graphitization process around 800 °C upon increasing temperature, the internal carbon structure gradually changed from the disordered state to an orderly state. With increasing graphitization degree, the gold-adsorption ability was reduced. The transition of carbon structure from disordered to ordered state during vacuum roasting might be the key reason for the decrease in the “preg-robbing” ability of organic carbon. This study established a direct correlation between graphitization degree and preg-robbing capacity reduction, providing a novel strategy for optimizing gold recovery in refractory ores.

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来源期刊
JOM
JOM 工程技术-材料科学:综合
CiteScore
4.50
自引率
3.80%
发文量
540
审稿时长
2.8 months
期刊介绍: JOM is a technical journal devoted to exploring the many aspects of materials science and engineering. JOM reports scholarly work that explores the state-of-the-art processing, fabrication, design, and application of metals, ceramics, plastics, composites, and other materials. In pursuing this goal, JOM strives to balance the interests of the laboratory and the marketplace by reporting academic, industrial, and government-sponsored work from around the world.
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