无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2023, Vol. 55 ›› Issue (11): 93-99.doi: 10.19964/j.issn.1006-4990.2023-0052

• 工业技术 • 上一篇    下一篇

六氟磷酸锂副产含氟盐酸连续脱氟技术的开发与实践

周小平(), 冯好收(), 张国辉, 侯时磊, 张帅鹏, 刘利霞   

  1. 多氟多新材料股份有限公司,河南 焦作 454191
  • 收稿日期:2023-02-06 出版日期:2023-11-10 发布日期:2023-11-16
  • 通讯作者: 冯好收(1989— ),男,硕士,长期从事氟化工技改及生产管理工作;E-mail:962259585@qq.com
  • 作者简介:周小平(1974— ),女,高级工程师,长期从事氟化工研究及生产管理工作;E-mail:DFD0559@dfdchem.com

Development and practice of continuous defluoridation technology for by-products fluorinated hydrochloric acid of lithium hexafluorophosphate

ZHOU Xiaoping(), FENG Haoshou(), ZHANG Guohui, HOU Shilei, ZHANG Shuaipeng, LIU Lixia   

  1. Do-Fluoride New Materials Co.,Ltd.,Jiaozuo 454191,China
  • Received:2023-02-06 Published:2023-11-10 Online:2023-11-16

摘要:

含氟盐酸是六氟磷酸锂的副产物,氟的脱除是其回收利用的关键。在分析间歇脱氟工艺的问题与不足的基础上,提出了连续脱氟技术。连续脱氟技术明显地改善了脱氟过程的自动化程度、品质、产能及环境等,从而实现了盐酸中氟质量浓度由55 g/L降低至11 g/L,产能提升118%,人均劳动效率提升337%,氟化钙粒度增长约30%,固体废弃物排放量减少52%,尾气达到超低排放标准(氟化物体积质量≤3 mg/m³,颗粒物体积质量≤10 mg/m³)。

关键词: 六氟磷酸锂, 含氟盐酸, 脱氟技术, 回收氟化钙, 干化机

Abstract:

Fluorinated hydrochloric acid is a by-product of lithium hexafluorophosphate,and the removal of fluorine is the key to its recycling. Based on the analysis of the problems and shortcomings of the batch defluoridation process,a continuous defluoridation technology was proposed to remove fluorine from fluorinated hydrochloric acid. Continuous defluoridation technology significantly improved the automation,quality,capacity,and environmental management of the defluoridation process.As a result,the fluoride content in HCl was decreased from 55 g/L to 11 g/L,the production capacity was enhanced by 118%,the labor efficiency per capita was improved by 337%,the particle size of calcium fluoride was increased by about 30%,the solid waste emission was reduced by 52%,and the tail gas emission reached the ultra-low emission standard(fluoride content ≤3 mg/m³ and particulate matter content ≤10 mg/m³).

Key words: lithium hexafluorophosphate, fluorinated hydrochloric acid, defluoridation technology, recycle of calcium fluoride, drying machine

中图分类号: