摘要
在综合分析锂辉石精矿物相组成基础上,采用OLI Analyzer软件对LiAlSi_(2)O_(6)-K_(2)CO_(3)-H_(2)O体系锂辉石水热分解反应多相平衡进行模拟。结果表明,β-锂辉石在热力学上极易与K_(2)CO_(3)反应生成麦钾沸石和碳酸锂,当K_(2)CO_(3)加入量为K^(+)/Li^(+)≥1.4时,即可完全转化。水热试验获得的优化条件为:K_(2)CO_(3)加入量为K^(+)/Li^(+)=1.5、反应温度240℃、反应时间120min、水固质量比4,此条件下锂辉石中锂的浸出率为96.43%,最终反应产物主要为麦钾沸石与碳酸锂,与模拟结果相一致。
Based on comprehensive analysis of mineral phase composition of spodumene concentrate,OLI Analyzer software was used to simulate multiphase equilibrium of hydrothermal decomposition reaction of spodumene in LiAlSi_(2)O_(6)-K_(2)CO_(3)-H_(2)O system.The simulation results show thatβ-spodumene is thermodynamically easy to react with K_(2)CO_(3) to produce merlinoite and lithium carbonate.K_(2)CO_(3)can be converted completely when added in K^(+)/Li^(+)≥1.4.The hydrothermal experiment results show that leaching rate of lithium in spodumene is 96.43% under the optimum conditions including dosage of K_(2)CO_(3) of K^(+)/Li^(+)=1.5,reaction temperature of 240℃,reaction time of 120 min,and mass ratio of water to solid of 4.The composition of products are mainly merlinoite and lithium carbonate,which is consistent with the simulation results.
作者
姚文贵
马鸿文
刘梅堂
蒯雨晴
YAO Wen-gui;MA Hong-wen;LIU Mei-tang;KUAI Yu-qing(School of Materials Science and Technology,China University of Geosciences,Beijing 100083,China;Blue Sky Technology Corporation,Beijing 100083,China)
出处
《有色金属（冶炼部分）》
CAS
北大核心
2021年第4期28-35,共8页
Nonferrous Metals（Extractive Metallurgy)
基金
中央高校基本科研业务费资助项目(2562017382)。
关键词
锂辉石
碳酸钾
OLI模拟
碳酸锂
麦钾沸石
spodumene
potassium carbonate
OLI simulation
lithium carbonate
merlinoite
