氧化锆基除氟剂协同无定形氢氧化铝除氟实验研究  

Experimental Research on Fluoride Removal with Zirconia-Based Reagent Combined with Amorphous Aluminum Hydroxide

作　　者：郑宇 刘勇奇 巩勤学 石泉清 周启 刘少葵 仇雅丽 ZHENG Yu;LIU Yongqi;GONG Qinxue;SHI Quanqing;ZHOU Qi;LIU Shaokui;QIU Yali(Hunan Brunp Recycling Technology Co.,Ltd.,Changsha 410604,Hunan,China;Guangdong Brunp Recycling Technology Co.,Ltd.,Foshan 528000,Guangdong,China;Guangdong Provincial Key Laboratory of Battery Recycling,Foshan 528000,Guangdong,China)

机构地区：[1]湖南邦普循环科技有限公司,湖南长沙410604 [2]广东邦普循环科技有限公司,广东佛山528000 [3]广东省电池循环利用企业重点实验室,广东佛山528000

出　　处：《矿冶工程》2024年第4期234-236,240,共4页Mining and Metallurgical Engineering

基　　金：国家重点研发计划(2018YFC1901803)。

摘　　要：对某企业酸性浸出废水进行了一段氧化锆除氟、二段无定形氢氧化铝除氟实验研究。一段氧化锆除氟实验考察了反应温度、反应时间和氧化锆除氟剂加入量对废水除氟效果的影响,结果表明,升高温度、延长反应时间都能促进除氟剂除氟率提高;反应温度75℃、除氟剂加入量50 g/L、反应时间50 min时,除氟率达到96%,废水中氟质量浓度由600 mg/L降至25 mg/L。一段除氟后废水进行二段无定形氢氧化铝除氟,反应温度70℃、反应时间60 min、氢氧化铝加入量5 g/L时,废水氟质量浓度由25 mg/L降至6.5 mg/L;除氟渣晶型良好、衍射峰明显,XRD检测结果显示Na_(3)AlF_(6)是除氟渣中主要成分。An experimental study was carried out on fluoride removal from the wastewater after acid leaching process in one enterprise.In the experiment,zirconia was used in the 1st-stage reaction and amorphous aluminum hydroxide was adopted in the 2nd-stage reaction for fluoride removal,and effects of reaction temperature,reaction time and adding amount of zirconia-based reagent on the fluoride removal effect were explored.It is found that both higher temperature and longer reaction time can promote fluoride reduction effect of fluoride removing reagent.1st-stage reaction ran for 50 min at 75℃with an addition of 50 g/L zirconia-based reagent,the fluoride reduction rate was up to 96%and fluoride mass concentration in the wastewater was reduced from 600 mg/L to 25 mg/L.After that,2nd-stage reaction at 70℃ran for 60 min,by adding 5 g/L amorphous aluminum hydroxide,the fluoride mass concentration in the wastewater was down from 25 mg/L to 6.5 mg/L.It is shown that the residue left after fluoride removal process has a good crystal structure and obvious diffraction peak.XRD analysis shows that Na_(3)AlF_(6) is the main component in the residue.

关 键 词：废水处理 含氟废水 除氟剂 氧化锆 氢氧化铝 除氟 

分 类 号：X703[环境科学与工程—环境工程] TQ115[化学工程—无机化工]