解吸条件对载金D301树脂解吸行为的影响  

Influence of desorption conditions on desorption behavior of gold-loaded D301 resin

作　　者：牛会群 杨洪英 佟琳琳 吴钰龙 NIU Huiqun;YANG Hongying;TONG Linlin;WU Yulong(School of Mining Engineering,Heilongjiang University of Science and Technology,Harbin 150022,China;School of Metallurgy,Northeastern University,Shenyang 110819,China)

机构地区：[1]黑龙江科技大学矿业工程学院,哈尔滨150022 [2]东北大学冶金学院,沈阳110819

出　　处：《中国有色金属学报》2025年第2期633-642,共10页The Chinese Journal of Nonferrous Metals

基　　金：国家自然科学基金资助项目(52274348);黑龙江省“优秀青年教师基础研究支持计划”资助项目(YQJH2023091)。

摘　　要：本文针对载金D301树脂的解吸过程,研究不同解吸剂种类、解吸剂浓度、液固比、温度和解吸时间对载金D301树脂解吸过程的影响。结果表明:硫脲-盐酸混合溶液是最优的解吸剂;载金D301树脂的解吸过程符合Boyd液膜扩散方程,液膜扩散为主要的控制步骤,液膜扩散系数(K)值为3.54×10^(-1)s,液膜厚度和金的线性分配系数与硫脲浓度和盐酸浓度有关。另外,硫脲和盐酸浓度对解吸效率具有显著性影响,提高硫脲和盐酸溶液浓度有利于载金D301树脂的解吸行为。通过解吸条件优化,获得最佳条件如下:硫脲浓度0.36 mol/L、盐酸浓度0.2 mol/L、液固比5∶1 mL/mg、温度25℃和解吸时间100 min,该条件下载金D301树脂的平均解吸效率可达99.45%。This study investigatd the effects of various eluent types,eluent concentrations,liquid-solid ratio,temperatures,and desorption time on the desorption process of gold-loaded D301 resin.The results indicate that the thiourea-hydrochloric acid mixed solution serves as the optimal eluent.And the desorption process of goldloaded D301 resin conforms to the Boyd liquid film diffusion equation,with liquid film diffusion being the primary controlling step.The liquid film diffusion coefficient(K)is 3.54×10^(−1) s,and the thickness of the liquid film as well as the linear distribution coefficient of gold are related to the concentrations of thiourea and hydrochloric acid.The concentrations of thiourea and hydrochloric acid have significantly impacts on the desorption efficiency,and increasing the concentrations of thiourea and hydrochloric acid solutions is beneficial for the desorption behavior of gold-loaded D301 resin.Through optimization of desorption conditions,the optimal parameters are determined as follows:thiourea concentration of 0.36 mol/L,hydrochloric acid concentration of 0.2 mol/L,liquid-solid ration of 5∶1 mL/mg,temperature of 25℃,and desorption time of 100 min.Under these conditions,the average desorption efficiency of gold-load D301 resin reaches 99.45%.

关 键 词：D301树脂 TCCA浸金液 硫脲 解吸 多元线性回归 

分 类 号：TF831[冶金工程—有色金属冶金]