摘要
采用响应曲面法优化超声强化NH_(3)-C_(4)H_(6)O_(6)-H_(2)O体系浸出氧化锌烟尘提锌工艺条件,分别考察超声功率、反应时间、酒石酸浓度、液固比四因素及其交互作用对锌浸出率的影响。结果表明,酒石酸浓度与液固比间的交互作用对锌浸出率影响最为显著。优化提锌工艺条件为:控制超声功率300 W、浸出时间30 min、氨水浓度7 mol/L、酒石酸浓度0.5 mol/L、液固比5∶1、浸出温度45℃、搅拌速度100 r/min,该优化条件下的锌浸出率可达80.05%,较常规浸出相比、超声条件下锌浸出率提高5.25个百分点;NH_(3)-C_(4)H_(6)O_(6)-H_(2)O体系下ZnFe_(2)O_(4)、Zn_(2)SiO_(4)、ZnS物相难浸出;羧酸根可与Zn^(2+)形成络合离子,强化锌浸出。
The response surface method was used to optimize the ultrasonic-enhanced NH_(3)-C_(4)H_(6)O_(6)-H_(2)O system for leaching zinc oxide soot to extract zinc.The effects of ultrasonic power,reaction time,tartaric acid concentration,liquid-solid ratio and their interaction on the zinc leaching rate were investigated respectively.The results show that the interaction between tartaric acid concentration and liquid-solid ratio has the most significant effect on zinc leaching rate.The optimized zinc extraction process conditions are as follows:control ultrasonic power 300 W,leaching time 30 min,ammonia concentration 7 mol/L,tartaric acid concentration 0.5 mol/L,liquid-solid ratio 5∶1,leaching temperature 45℃,stirring speed 100 r/min,the zinc leaching rate under this optimized condition can reach 80.05%,compared with the conventional leaching,zinc leaching under ultrasonic conditions rate increased by 5.25 percentage points;zinc leaching under ultrasonic conditions ZnFe_(2)O_(4),Zn_(2)SiO_(4) and ZnS phases are difficult to leaching in NH_(3)-C_(4)H_(6)O_(6)-H_(2)O system;carboxylate can form complex ions with Zn2+to strengthen zinc leaching.
作者
郑雪梅
王毕雄
李金京
马爱元
ZHENG Xuemei;WANG Bixiong;LI Jinjing;MA Aiyuan(School of Chemistry and Materials Engineering,Liupanshui Normol University,Liupanshui 553004,China.;Guizhou Provincial Key Laboratory of Coal Clean Utilization,Liupanshui 553004,China)
出处
《有色金属工程》
CAS
北大核心
2022年第7期89-96,124,共9页
Nonferrous Metals Engineering
基金
贵州省科技厅技术基金重点项目(黔科合基础[2019]1444)
六盘水师范学院科技创新团队(LPSSYKJTD201801)
六盘水师范学院重点学科项目(LPSSYZDXK202001)
贵州省煤炭洁净利用重点实验室项目(黔科合平台人才[2020]2001)
2021年大学生创新训练项目(S202110977043)。
