碳质金矿中碳质物及其“劫金”机理研究进展  

Research Progress on Carbonaceous Matters and Its“Preg-robbing”Mechanism in Carbonaceous Gold Ores

作　　者：张辛未 宋永辉[1] 董萍 尹宁 廖龙 张盼盼 ZHANG Xinwei;SONG Yonghui;DONG Ping;YIN Ning;LIAO Long;ZHANG Panpan(School of Metallurgical Engineering,Xi’an University of Architecture and Technology,Key Laboratory of Gold and Resources of Shaanxi Province,Xi’an 710055,Shaanxi,China;Shaanxi Institute of International Trade&Commerce,Xi’an 712046,Shaanxi,China)

机构地区：[1]西安建筑科技大学冶金工程学院,陕西省黄金与资源重点实验室,陕西西安710055 [2]陕西国际商贸学院,陕西西安712046

出　　处：《黄金科学技术》2022年第2期302-312,共11页Gold Science and Technology

基　　金：国家自然科学基金项目“基于煤基电极的电吸附处理氰化废水技术及其应用基础研究”(编号:51774227)资助。

摘　　要：碳质金矿是重要的难处理金矿资源之一,碳质物“劫金”是金浸出率低下的主要原因。碳质物组分复杂,不同组分的碳质物的“劫金”能力和“劫金”行为存在差异,磨矿和浸出环节对碳质物的“劫金”能力也会产生影响,这些因素均能直接影响金的浸出率。通过系统总结碳质金矿中碳质物在组成特征、“劫金”机理及“劫金”能力的影响因素等方面的研究进展,对碳质物“劫金”机理现有研究工作的不足及未来研究方向进行了探讨,为碳质金矿碳质物劫金机理及预处理工艺的研究提供了重要参考。The carbonaceous matters in carbonaceous gold ores can adsorb the gold dissolved in the process of cyanide leaching,which seriously affects the recovery of gold and is one of the most important troubles in gold processing.Various pretreatment methods have been used to eliminate the harmful effects of carbonaceous matters in gold leaching processes.Due to the characteristics of carbonaceous matters such as fine particle size,wide distribution range of particle size,complex compositions and difficulty on separation,there are few achievements of in-depth research on carbonaceous matters in carbonaceous gold ores at home and abroad.The main research tends to the development and optimization of the pretreatment processes of carbonaceous gold ores.Some new discoveries have enriched the scientific understanding of carbonaceous matters.Many kinds of substances can absorb gold in leaching process,but in the presence of carbonaceous matters,the absorb ability of other substances is often ignored.Among these carbonaceous matters,organic carbon and elemental carbon with pore structure which is similar to activated carbon have strong“preg-robbing”ability.The compositions of organic carbon have not been determined so far,but the discovery of kerogen further sheds light on the compositions of organic carbon and the geological conditions under which it formed.The kerogen are an important gold-containing carrier in the form of porous powder and solid particles.The discovery of kerogen provides a new idea for the removal of organic carbon.The pore structure has been found to be a strong condition for carbonaceous matters to absorb gold.The conclusion that destroying the pore structure can reduce the“preg-robbing”ability of carbonaceous matters further proves the view that carbonaceous matters with pore structure can adsorb the dissolved gold.The complexation between humic acid and metal ions also provides a reference for the“preg-robbing”theory of organic carbon.Some studies have found that carbonaceous matters affect

关 键 词：碳质金矿 碳质物 预处理技术 “劫金”机理 金浸出率 

分 类 号：TD982[矿业工程—选矿]