钽铌厂矿石分解工序含氟废水处理试验  

Treatment Study of Fluoride Wastewater from Ore Decomposition Process of a Tantalum and Niobium Plant

作　　者：李水芳[1] 陈学泽[1] 王元兰[1] 谭晓燕[1] 

机构地区：[1]中南林学院理学院,湖南株洲412006

出　　处：《中南林学院学报》2003年第2期98-100,共3页Journal of Central South Forestry University

基　　金：中南林学院青年科学基金项目.项目代号[第0422号].

摘　　要：　以CaCl2为沉淀剂,加入适量FeCl3作絮凝剂,对钽铌厂矿石分解工序含氟量为1596mg/L的碱性废水进行除氟试验.研究了Ca2+/F-摩尔比、絮凝剂种类、絮凝剂用量、废水pH值、混凝搅拌时间等因素对水中残氟量的影响.结果表明:按Ca2+/F-摩尔比为3加入CaCl2,按30mg/L加入FeCl3,混凝搅拌5min,静置1h后,废水含氟量可降至8.1mg/L,达到国家污水综合排放标准中的一级标准.This paper presents a treatment study of some fluoride wastewater from the ore decomposition process of a tantalum and niobium plant, with Fconcentration being 1 596 mg/L. The treatment was conducted by using CaCl2 as precipitant and suitable FeCl3 as coagulant. We analyzed the influence of mol (Ca2+)/mol (F), the kinds of coagulant, the dosages of coagulant, the pH value of wastewater and the time of stirring upon the remains of Fconcentration in the wastewater. The treatment results show that by adding CaCl2 up to mol(Ca2+)/mol(F)=3, adding FeCl3 up to 30 mg/L, stirring 5 min and keeping the wastewater static for 1 h, its Fconcentration drops to 8.1 mg/L, which meets the criterion of Class I of the National Standard for wastewater discharge.

关 键 词：钽铌厂废水 矿石分解工序 含氟废水 废水处理 沉淀剂 絮凝剂 残氟量 

分 类 号：X751[环境科学与工程—环境工程]