摘要
本文针对氧化锌烟尘碱洗法脱除氟氯技术,通过研究碱洗过程不同氧化锌烟尘中氟氯的脱除效果,同时针对氟脱除率低的情况,采用逐级提取法,检测氟的在氧化锌烟尘和碱洗渣中的赋存状态,从矿物学角度分析影响除氟效果的原因。研究结果表明:布袋氧化锌烟尘和锅炉氧化锌烟尘中的氯易于碱洗脱除,而锅炉氧化锌烟尘中的氟较布袋氧化锌烟尘中氟难脱除,锅炉氧化锌烟尘中存在50%以上的残留态氟,以及大量在碱性环境中溶解度较低的CaF_(2)、ZnS和FeS_(2)等,导致锅炉氧化锌烟尘的脱氟率较低。氧化锌烟尘中氟的赋存状态是影响氟脱除效果的关键因素。
This paper focuses on the technology of removing fluorine and chlorine from zinc oxide dust using alkali washing,by studying the removal effect of fluorine and chlorine in different zinc oxide dusts during the alkali washing process,and adopting a gradual extraction method to detect the state of fluorine in zinc oxide dust and alkali washing residue,and analyzing the influencing factors of fluorine removal from a mineralogical perspective.The results show that the chlorine in bag filter zinc oxide dust and boiler zinc oxide dust is easily removed by alkali washing,while the fluorine in boiler zinc oxide dust is more difficult to remove than that in bag filter zinc oxide dust,with more than 50%of residual fluorine and a large amount of calcium fluoride,zinc sulfide and iron sulfide with low solubility in alkaline environment,resulting in a low fluorine removal rate for boiler zinc oxide dust.The state of fluorine in zinc oxide dust is the key factor affecting the fluorine removal effect.
作者
高红林
杨蕊琼
姜勇
付光
GAO Honglin;YANG Ruiqiong;JIANG Yong;FU Guang(Huize Smelting Branch,Yunnan Chihong Zn&Ge Co.,Ltd.,Qujing 654200,China;BGRIMM Technology Group,Beijing 100160,China)
出处
《中国矿业》
北大核心
2025年第S2期693-697,共5页
China Mining Magazine
关键词
氧化锌烟尘
碱洗
氟
氯
脱除
zinc oxide dust
alkaline washing
fluorine
chlorine
removal
