碳中和目标下四川梭罗沟金矿铁镁质尾矿固碳潜力评估  

Evaluation of carbon fixation potential of ferromagnesian tailings of Suoluogou Gold Mine in Sichuan Province under the target of carbon neutralization

作　　者：余旭辉[1,2,3] 李振江 周福篯[1,2] 张文林 游水生 林鑫[1,2] 李志伟 Yu Xuhui;Li Zhenjiang;Zhou Fujian;Zhang Wenlin;You Shuisheng;Lin Xin;Li Zhiwei(Regional Geological Survey Team of Sichuan Geology and Mineral Bureau;Sichuan Rongda Mining Group Co.,Ltd.;College of Earth Sciences,Chengdu University of Technology)

机构地区：[1]四川省地质矿产勘查开发局区域地质调查队 [2]四川省容大矿业集团有限公司 [3]成都理工大学地球科学学院

出　　处：《黄金》2023年第6期90-93,共4页Gold

基　　金：四川省地质矿产勘查开发局科技计划项目(SCDKKJXM-2019006);四川省地矿局地勘基金项目(川地矿发〔2004〕67号);中国地质调查局地调项目(DD20160026,DD20190167,DD20190379)。

摘　　要：铁镁质矿物可在自然条件下与CO_(2)反应形成稳定的碳酸盐矿物,是一种安全、经济且长久的碳捕获与封存方式。介绍了铁镁质矿物固碳机理,基于四川梭罗沟金矿铁镁质尾矿储量大,且可封存CO_(2)的CaO、MgO和FeO等成分占比高,分析了其固碳能力及潜力。初步估算梭罗沟金矿现有尾矿的CO_(2)封存量高达164万t,按目前的生产效率估算未来年均CO_(2)封存量约12万t,未来生产的尾矿至少可以封存CO_(2)246万t。参考ERW法可将梭罗沟金矿尾矿砂进一步分选出铁镁质矿物后,喷撒在农田使其自然风化消耗CO_(2),全面推广将极大地降低CO_(2)封存成本。Ferromagnesian minerals can react with CO_(2)under natural conditions to form stable carbonate minerals,which is a safe,economical,and sustainable way of carbon capture and storage.This paper introduces the carbon fixation mechanism of ferromagnesian minerals and analyzes their carbon fixation capacity and potential based on the large reserves of ferromagnesian tailings from the Suoluogou Gold Mine in Sichuan,where the proportion of CaO,MgO,FeO and other components that can fixate CO_(2)is high.It is estimated that the current carbon storage capacity of the Suoluogou tailings is as high as 1.64 million tons,and the average annual CO_(2)storage capacity in the future is estimated to be about 120000 t based on the current production efficiency.At least 2.46 million tons of CO_(2)can be stored for the future production of tailings.Referring to the ERW method,ferromagnesian minerals can be further separated from the Suoluogou tailings and sprayed on farmland for natural weathering and consumption of CO_(2),which will greatly reduce the cost of CO_(2)storage by promoting comprehensive utilization of tailings.

关 键 词：碳中和 二氧化碳 矿物固碳 尾矿综合利用 铁镁质矿物 梭罗沟金矿 

分 类 号：TD926.4[矿业工程—选矿]