摘要
随着新能源的迅速发展,对锂的需求量日益增加。黏土型锂矿由于储量大、开发晚,未来将成为我国锂的主要来源之一。以贵州某黏土型锂矿为原料,采用硫酸铵焙烧-酸浸方法进行提锂。结果表明,在硫酸铵用量50%、焙烧温度400℃、焙烧时间120 min、4%硫酸作浸出剂、液固比4∶1、浸出时间120 min的条件下,锂的浸出率达到90.90%。通过焙烧,硫酸铵与锂绿泥石中的Al^(3+)发生反应生成硫酸铝铵,破坏了锂绿泥石的晶格结构进而将锂释放出来,生成可溶性的硫酸锂,利于后续浸出。
With the rapid development of new energy sources,the demand for lithium is increasing.Clay-type lithium ore has large reserves and late development,and becomes one of the main sources of lithium resources in China.The roasting-acid leaching method with ammonium sulfate is used to extract lithium from clay-type lithium ore in a certain place,Guizhou province.The results show that the leaching of lithium reaches to to 90.90%under the conditions of ammonium sulfate dosage of 50%,roasting temperature 400℃,roasting time for 120 min,4%sulfuric acid as leaching agent,liquid-solid ratio of 4∶1,and leaching time of 120min.Through the reaction between ammonium sulfate and Al^(3+) in cookeite,ammonium aluminum sulfate is formed,which destroys the lattice structure of cookeite releases lithium.Soluble lithium sulfate is generated,which is beneficial to subsequent leaching.
作者
孔令安
李正要
钟振宇
马巧焕
KONG Ling′an;LI Zhengyao;ZHONG Zhenyu;MA Qiaohuan(School of Civil and Resource Engineering,University of Science and Technology Beijing,Beijing 100083,China)
出处
《有色金属工程》
CAS
北大核心
2022年第12期66-72,共7页
Nonferrous Metals Engineering
关键词
黏土型锂矿
锂绿泥石
硫酸铵
焙烧
酸浸
clay-type lithium ore
cookeite
ammonium sulfate
roasting
acid leaching
