低温常压条件下NaCl_H_2O体系对铜活化迁移的影响因素Ⅰ:温度、CO_2及H_2S气体  

Influence factors Ⅰ: Temperature, CO_2 and H_2S gas over copper activation migration in Na Cl_H_2O system under condition of atmospheric pressure and low temperature

作　　者：任彩霞[1,2] 马黎春[1] 汤庆峰[3] 曹养同[1] 

机构地区：[1]中国地质科学院矿产资源研究所国土资源部盐湖资源与环境重点实验室,北京100037 [2]中国地质大学地球科学与资源学院,北京100083 [3]北京市理化分析测试中心,北京100089

出　　处：《矿床地质》2015年第2期397-403,共7页Mineral Deposits

基　　金：中央级公益性科研院所基本科研业务费专项基金(编号:K1010/YK1404);国家自然科学基金青年基金(编号:41002028);国家重点基础研究发展计划(973)项目(编号:2011CB403007)共同资助

摘　　要：文章采用室内模拟实验,研究了不同浓度的Na Cl_H2O体系与CO2、H2S气体交互作用对砂岩中铜的活化萃取作用。结果表明,高盐度卤水在0~90℃范围内,随着温度的升高,对铜的活化能力逐渐增强,尤其是在50℃以上,铜的活化效果十分显著,而高温和高盐度的交互作用可极大增强铜的活化能力;在常温常压条件下,随Na Cl_H2O体系盐度升高,溶解CO2的能力也增强,p H值相应下降,溶液呈弱酸性,铜的活化能力增强;在CO2作用下,卤水体系的盐度与p H值、Eh值及Cu的释出量均表现出明显的线性关系,相关系数R2分别为0.9699、0.9704和0.9782;而H2S气体的通入,不利于Cu的活化迁移,主要以沉淀作用为主。This paper focuses on the copper activation and extraction of sandstone-hosted copper deposits under the in- teraction effect of salinity, CO2 and HaS gas in the NaC1-H20 system on the basis of laboratory simulation experiments. The experimental results indicate that the copper activation capability of high-salinity brine sys- tems increases gradually with the rising temperature from 012 to 9012; especially when the temperature is higher than 5012, the activation effect of copper is quite remarkable. The interaction effect of high-temperature and high-salinity can enhance the copper activation capability greatly. Under the condition of atmospheric pres- sure and normal temperature, the higher the salinity in NaC1-H20 system, the more the dissolved CO2, and,what is more, the pH value tends to be lowered, the solution tends to become weak acid, and the copper activa- tion effect increases accordingly. There exists good linear relationship between salinity and pH, Eu, dissolved Cu, with the correlation coefficient being 0. 9699, 0. 9704 and 0. 9782 respectively. The input of hydrogen sul- fide（H2S） decreases the activation and transportation d copper, and hence the precipitation of CuS takes place, resulting dominantly in the sedimentation process.

关 键 词：地球化学 卤水 铜活化 温度 CO2 H2S 

分 类 号：P618.510.4[天文地球—矿床学]