化工矿物与加工2025，Vol.54Issue(1)：1-7,7.DOI:10.16283/j.cnki.hgkwyjg.2025.01.001
基于化学-絮凝沉淀法的六氟磷酸锂副产氯化铵脱氟工艺研究
Study on the defluorination process of lithium hexafluorophosphate by-product ammonium chloride based on chemical-flocculation precipitation method
摘要
Abstract
The fluorine-containing absorption solution produced by the ammonium chloride pretreatment device of lithium hexafluorophosphate was used as the treatment object,and the calcium source and flocculant polyacrylamide(PAM)were added to defluorinate the solution by the chemical-flocculation-precipitation method.The influences of calcium source,pH,reaction temperature,stirring time and other factors on the defluorination effect of the absorption solution were investigated.The interaction and significance of the influencing factors were analyzed by response surface tests,and the defluorination process parameters were optimized.The results show that under the same flocculation conditions,the influences on the defluorination effect were in the following order:pH>CaCl2 input>reaction tempera-ture>stirring time.The optimal defluoridation conditions were 113%CaCl2 input(compared with the theoretical amount of CaCl2 required for defluoridation),pH=7.1,reaction temperature 50℃,stirring for 55 min,and the residual fluoride concentration in the absorbent under the optimal conditions was 3.73 mg/L.关键词
化学沉淀法/絮凝沉淀法/氯化铵/脱氟/响应面试验/吸收液/聚丙烯酰胺Key words
chemical precipitation method/flocculation precipitation method/ammonium chloride/defluorination/response surface test/absorbing liquid/polyacrylamide分类
信息技术与安全科学引用本文复制引用
何兵兵,雷康,王凤丽,彭海南..基于化学-絮凝沉淀法的六氟磷酸锂副产氯化铵脱氟工艺研究[J].化工矿物与加工,2025,54(1):1-7,7.基金项目
贵州省科技计划项目(黔科合战略找矿[2022]ZD006). （黔科合战略找矿[2022]ZD006）
