摘要
铁是湿法炼锌原料中含量较高且难脱除的杂质之一,硫酸锌电积液中的Fe^(2+)是电积工艺过程中重点关注的有害杂质之一。以含Fe^(2+)的硫酸锌模拟溶液为研究对象,开展锌电积的工艺试验,系统研究Fe^(2+)浓度、电流密度、极间距和电积时间对锌电积电流效率、电能消耗和电积锌形貌等的影响规律。结果表明,当电积液Fe^(2+)浓度在6 mg/L以上时,将会引起电流效率严重下降及吨锌电耗显著增加,并使阴极锌反溶;在电积液Fe^(2+)浓度为6 mg/L时,优化的工艺参数条件为:电流密度400 A/m^(2)、极间距4 cm、电积时间少于16 h,在此条件下,电流效率超过90%,吨锌电耗低于2950 kWh,同时阴极锌表面较为光滑平整。
Iron is one of the undesired element with high content and difficult to remove in the raw materials of zinc hydrometallurgy,and the Fe^(2+)ions are one of the impurity that are of great concern in the zinc electro winning process.The simulated zinc sulfate solution containing Fe^(2+)was used to carry out zinc electrowinning experiments.The effects of Fe^(2+)concentration,current density,time,electrode distance on the current efficiency,power consumption and zinc morphology were studied systematically.The results showed that the current efficiency was seriously reduced and the power consumption per ton of zinc was significantly increased when the concentration of Fe^(2+)in the zinc sulfate electrolyte was more than 6 mg/L,meanwhile the cathod zinc was redissolved.As the concentration of Fe^(2+)was below 6 mg/L,the optimized operating conditions were current density of 400 A/m^(2),electrode distance of 4 cm and electrowinning time of<16 h.More than 90%of the current efficiency,less than 2950 kWh of the per ton zinc power consumption and high quality of cathode zinc with smooth and flat surface was obtained at these optimized conditions.
作者
杨四齐
夏先禹
张利华
白希为
姚浩
YANG Siqi;XIA Xianyu;ZHANG Lihua;BAI Xiwei;YAO Hao(Key Laboratory of Unconventional Metallurgy,Ministry of Education,Kunming 650093,China;Faculty of Metallurgical and Energy Engineering,Kunming University of Science and Technology,Kunming 650093,China;State Key Laboratory of Complex Non-ferrous Metal Resources Clean Utilization,Kunming 650093,China)
出处
《有色金属工程》
CAS
北大核心
2023年第7期54-60,共7页
Nonferrous Metals Engineering
基金
国家自然科学基金资助项目(52164040)
云南省基础研究计划项目(202101AT070121)
“兴滇英才支持计划”青年人才项目(YNWR-QNBJ-2019-150)。
