化工矿物与加工2025，Vol.54Issue(1)：8-16,9.DOI:10.16283/j.cnki.hgkwyjg.2025.01.002
以碳酸钾为沉淀剂制备碳酸锂及其反应结晶条件优化
Preparation of lithium carbonate using potassium carbonate as precipitator and optimization of reaction crystallization conditions
摘要
Abstract
Sodium carbonate will produce a large amount of carbon emissions,wastewater and waste residue in the production process,which may pose a threat to the environment.This article used potassium carbonate instead of sodium carbonate as a precipitant for preparing lithium carbonate,and added ultrasound during the reaction crystalliza-tion process to control the formation of large aggregates in lithium carbonate.Response surface methodology was used to optimize the main reaction crystallization conditions,and variance analysis was conducted on the potassium content and particle size D50 in lithium carbonate,The results show that the potassium content fitting model is significant(P=0.000 2,F=24.47),with a fitting coefficient 0.969 2,a modified fitting coefficient 0.929 6,and a predicted fitting coefficient 0.875 1,meeting the requirements of analysis of variance;The particle size D50 fitting model is significant(P=0.000 2,F=24.91),with the fitting coefficient 0.9697 7,the modified fitting coefficient 0.930 8,and the pre-dicted fitting coefficient 0.747 2,meeting the requirements of analysis of variance.The main influencing factor of potassium content in lithium carbonate is temperature,and there is a significant interaction between reaction crystalli-zation temperature and ultrasonic power;The main influencing factors on the particle size D50 of lithium carbonate are temperature and ultrasonic power,but the interaction between these factors is not significant.The optimal conditions have been verified,with an average potassium content of 0.899 mg/g lithium carbonate,an average particle size D50 of 17.346 μm,and an average yield of 86.91%.The predicted values are close to the experimental values.关键词
碳酸锂/碳酸钾/响应面法/超声波/粒径分布/方差分析/钾含量Key words
lithium carbonate/potassium carbonate/response surface method/ultrasonic/particle size distribution/analysis of variance/potassium content分类
化学化工引用本文复制引用
张志强,覃冬兰,王佳琴,成春春,周娜..以碳酸钾为沉淀剂制备碳酸锂及其反应结晶条件优化[J].化工矿物与加工,2025,54(1):8-16,9.基金项目
国家自然科学基金项目(21968026) （21968026）
青海省科技厅项目(2023-ZJ-721). （2023-ZJ-721）
