稀土冶炼废水处理过程中草酸再生循环利用研究  

Research on Oxalic Acid Utilization and Recycling in Rare Earth Smelting Wastewater Treatment

作　　者：侯睿恩 刘菁 王哲[1,2] 崔建国 郝晓燕[3] 王玉利 徐萌 陈禹夫 高婷 HOU Rui-en;LIU Jing;WANG Zhe;GUI Jian-guo;HAO Xiao-yan;WANG Yu-li;XU Meng;CHEN Yu-fu;GAO Ting(State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization,Baotou Research Institute of Rare Earths,Baotou 014030,China;National Engineering Researh Centre of Rare Earth Metallurgy and Functional Materials,Baotou 014030,China;Inner Mongolia Baotou Steel HeFa Rare Earth Co.,Ltd.,Baotou 014030,China;Baotou Iron&Steel Vocational Technical College,Baotou 014010,China;Northern Rare Earth SYL High-Tech Co.,Ltd.,Hohhot 010010,China)

机构地区：[1]包头稀土研究院,白云鄂博稀土资源研究与综合利用国家重点实验室,内蒙古包头014030 [2]瑞科稀土冶金及功能材料国家工程研究中心,内蒙古包头014030 [3]内蒙古包钢和发稀土有限公司,内蒙古包头014030 [4]包头钢铁职业技术学院,内蒙古包头014010 [5]北方稀土生一伦高科技有限公司,内蒙古呼和浩特010010

出　　处：《稀土》2021年第2期128-135,共8页Chinese Rare Earths

基　　金：北方稀土资助项目(2018H2016)。

摘　　要：针对草酸预处理稀土冶炼废水造成处理成本高的问题,本文系统研究了降低草酸消耗量的方法,同时根据草酸钙与硫酸反应的理论基础,研究了反应温度、硫酸过量百分比等条件对草酸钙转化率的影响,并设计了草酸钙循环转化工艺流程。利用经济价值相对较低的硫酸置换经济价值较高的草酸,从而降低了废水处理成本。对于工业实践具有很好的实用价值及指导意义。In view of the high cost of rare earth wastewater treatment caused by oxalic acid pretreatment,the method of reducing oxalic acid consumption was systematically studied in this paper.According to the theoretical basis of the reaction between calcium oxalate and sulfuric acid,the effects of reaction temperature,sulfuric acid excess percentage and other conditions on the conversion rate of calcium oxalate were investigated.The calcium oxalate recycling conversion process was desiged.The results show that using sulfuric acid with relatively low economic value to replace oxalic acid with relatively high economic value can reduce the cost of wastewater treatment.It has good practical value and guiding significance for industrial practice.

关 键 词：稀土冶炼废水 硫酸转化 草酸循环利用 

分 类 号：O614.33[理学—无机化学]