摘要
含碳难处理金矿选冶工艺的难点在于碳质组分对金浸出行为的吸附作用。通过系统梳理含碳难处理金矿的资源分布规律、矿物结构特征及碳质物对金的吸附机制,重点探讨碳质物的物理化学性质及其与金的相互作用机制。研究发现:碳质物的比表面积、孔隙结构、官能团组成及石墨化程度对“劫金”效应具有显著影响,元素碳以物理吸附为主,腐殖质通过化学吸附与络合作用干扰金的浸出,而碳氢化合物对金吸附的作用可忽略。此外,通过评述多尺度表征技术对碳质物微观形貌、晶体结构和分子组成的分析能力,指出单一表征技术存在局限性,需通过多技术联用深入解析碳质物的结构特征。研究结果可为含碳难处理金矿的高效选冶及碳质物的精准表征提供理论依据和参考。
Carbon-containing refractory gold ores present a significant technical challenge in the fields of mineral processing and metallurgy,primarily due to the impact of carbonaceous materials on gold leaching behavior.This paper provides a comprehensive review of the resource distribution,mineral structural characteristics,and adsorption mechanisms associated with carbonaceous materials in these ores.It emphasizes the exploration of the physical and chemical properties of carbonaceous materials and their interaction mechanisms with gold.The study reveals that factors such as specific surface area,pore structure,functional group composition,and degree of graphitization of carbonaceous materials have a substantial influence on the preg-robbing effect.The adsorption of elemental carbon is predominantly driven by physical adsorption,whereas humic substances interfere with gold leaching through chemical adsorption and complexation.In contrast,the impact of hydrocarbons on gold adsorption is found to be negligible.Furthermore,this paper examines the analytical capabilities of multi-scale characterization techniques in assessing the microscopic morphology,crystalline structure,and molecular composition of carbonaceous materials.It highlights the limitations inherent in single characterization techniques and underscores the necessity for the integration of multiple techniques to thoroughly analyze the structural characteristics of carbonaceous materials.This research offers significant theoretical foundations and serves as a reference for the efficient processing of carboncontaining refractory gold ores and the precise characterization of carbonaceous materials.
作者
牛会群
汤祥凯
杨洪英
NIU Huiqun;TANG Xiangkai;YANG Hongying(School of Mining Engineering,Heilongjiang University of Science and Technology,Harbin 150000,Heilongjiang,China;School of Metallurgy,Northeastern University,Shenyang 110819,Liaoning,China)
出处
《黄金科学技术》
北大核心
2025年第5期1086-1100,共15页
Gold Science and Technology
基金
黑龙江省优秀青年教师基础研究支持计划“微波活化下煤矸石中矿物物相转化及有价元素高效溶出”(编号:YOJH2023091)资助。
关键词
含碳难处理金矿
碳质物
结构特征
吸附机制
表征方法
carbon-containing refractory gold ore
carbonaceous materials
structure characteristics
adsorption mechanism
characterization method
