热活化过硫酸盐法去除独居石浮选精矿中有机药剂的试验  

Study on the Thermal Activation of Persulfate to Remove Organic Agents from Monazite Flotation Concentrates

作　　者：吕荣平 支梅峰 姜子奕 袁作成 朱亮亮 余文[4] LYU Rongping;ZHI Meifeng;JIANG Ziyi;YUAN Zuocheng;ZHU Liangliang;YU Wen(China Nuclear Resources Development Co.,Ltd.,Beijing 100013,China;Hunan CNNC Jinyuan New Materials Co.,Ltd.,Hengyang 421010,China;School of Architectural and Surveying and Mapping Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,China;School of Resources and Environmental Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,China)

机构地区：[1]中核资源发展有限公司,北京101100 [2]湖南中核金原新材料有限责任公司,湖南衡阳421010 [3]江西理工大学土木与测绘工程学院,江西赣州341000 [4]江西理工大学资源与环境工程学院,江西赣州341000

出　　处：《有色金属工程》2023年第5期68-74,共7页Nonferrous Metals Engineering

基　　金：江西省主要学科学术技术带头人培养计划项目(20212BCJL23051);江西省重点研发计划项目(20203BBGL73232);江西理工大学清江优秀青年人才计划项目(JXUSTQJYX2018006)。

摘　　要：针对独居石浮选矿中残留的油酸钠和椰子油脂肪酸二乙醇酰胺对后续的选别和湿法冶炼作业产生不良影响的问题,提出采用热活化过硫酸盐法去除独居石浮选矿中的有机药剂。系统研究了矿浆温度、Na_(2)S_(2)O_(8)投加量、反应时间、矿浆pH值、搅拌速度对脱药效果的影响,结果表明提高矿浆温度、延长反应时间、增加Na_(2)S_(2)O_(8)投加量均有利于脱药;矿浆pH值和搅拌速度对脱药效果的影响较小,在pH值为3~11、搅拌速度为200~600r/min条件下,均可有效去除精矿中的有机药剂;矿浆浓度过高不利于脱药。确定最佳工艺参数为:反应温度为90℃、Na_(2)S_(2)O_(8)投加量为8kg/t、搅拌速度为500r/min、矿浆浓度为33.33%、反应时间为60min,脱药反应后矿浆的TOC值可降低至1mg/L以下,脱药后的独居石浮选精矿几乎没有起泡能力,脱药后的废水可以重复利用。In view of the problem that the residual sodium oleate and coconut oil fatty acid diethanolamide in the monazite concentrate by flotation have adverse effects on the subsequent sorting and hydrometallurgy operations,a thermal activation persulfate method is proposed to remove the organic reagents from the monazite.The effects of pulp temperature,Na_(2)S_(2)O_(8)dosage,reaction time,pulp pH,and stirring speed on removing of reagents were systematically studied.The results show that increasing the pulp temperature,prolonging the reaction time,and increasing the dosage of Na_(2)S_(2)O_(8)are all beneficial to the reagent removal.The pH of the pulp and the stirring speed have little effect on the reaction.When the pH value is 3—11,the stirring speed is 200—600r/min,the organic chemicals in the concentrate can be effectively removed.If the slurry concentration is too high,it is not conducive to reagent removal.The optimal process parameters are determined as follows:the reaction temperature is 90℃,the dosage of Na_(2)S_(2)O_(8)is 8kg/t,the stirring speed is 500r/min,the pulp concentration is 33.33%,and the reaction time is 60min.After the reaction,the TOC value of the pulp can be reduced to less than 1 mg/L,and the resulting monazite ore has almost no foaming ability,and the wastewater can be reused.

关 键 词：独居石 有机药剂 热活化 过硫酸盐 脱药 

分 类 号：X52[环境科学与工程—环境工程]