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从钕铁硼废料中高效回收稀土是缓解稀土资源紧张局势的重要途径。目前，从钕铁硼废料中回收稀土的难点在于稀土与铁的深度分离。利用赤铁矿除铁法分离钕铁硼废料中的Fe，达到稀土与Fe深度分离的目的。针对影响稀土浸出率及稀土与铁分离效果的因素进行了详细的考察。结果表明：在氧化剂NaNO3用量60 mg/g原料，HCl用量0.663 mL/g，浸出温度180℃，浸出时间3 h，液固比2.5 mL/g，搅拌速度300 r/min的条件下，REO和镨钕浸出率分别为95.91%、97.99%，酸浸液铁与稀土的浸出选择性s(Fe_2O3/REO)为4.37%。XRD及SEM结果显示酸浸渣主要成分为过滤性能良好的赤铁矿。
Abstract：Efficient recovery of rare earths from spent NdFeB is a key way to alleviate the shortage of rare earth resources. At present, the difficulty in recovering rare earths from spent NdFeB is the deep separation of rare earths and iron. The purpose of deep separation of rare earth and Fe is achieved by removing the Fe from NdFeB hydrochloric acid leaching solution by hematite precipitation. The factors affecting the leaching rate of rare earth and the separation effect of rare earth and iron were investigated in detail. The results show that the leaching rate of REO and praseodymium-neodymium is 95. 91% and 97. 99%, respectively, and the leaching selectivity of iron and rare earth of acid leaching solution s(Fe_2O3/REO) is 4. 37% under the conditions including dosage of oxidant NaNO3 of 60 mg/g of raw material, dosage of HCl of 0. 663 mL/g, leaching temperature of 180 ℃, leaching time of three hours, liquid solid ratio of 2. 5 mL/g and stirring speed of 300 r/min. XRD and SEM results show that the main composition of the leaching residue is hematite with good filtration performance.
[1]陈丽杰,李子良,龚傲,等.从稀土废料中回收稀土的研究进展[J].中国稀土学报,2019,37(3):259-272.CHEN L J,LI Z L,GONG A,et al.Research progress of rare earth recovery from rare earth waste[J].Journal of the Chinese Society of Rare Earths,2019,37(3):259-272.
[2]付利雯,汪金良,雷翔,等.钕铁硼废料资源化回收利用研究进展[J].有色金属科学与工程,2020,11(1):92-97.FU L W,WANG J L,LI X,et al.Research progress on the recycling and utilization of Nd-Fe-B wastec[J].Nonferrous Metals Science and Engineering,2020,11(1):92-97.
[3]肖荣晖.钕铁硼生产中废料的回收及利用[J].有色冶炼,2001,2(1):23-26.XIAO R H.Recovery and utilization of waste from neodymium ferroboron production[J].Non-Ferrous Smelting,2001,2(1):23-26.
[4]栗健茹,徐存英,卢精灵,等.废旧钕铁硼火法回收研究现状及进展[J].矿冶,2022,31(1):61-69.LI J R,XU C Y,LU J L,et al.The research situation and advances in pyrometalljrgy recovery of NdFeB waste[J].Mining and Metallurgy,2022,31(1):61-69.
[5]王毅军,刘宇辉,郭军勋,等.用盐酸优溶法从废料中回收稀土[J].湿法冶金,2006,25(4):195-197.WANG Y J,LIU Y H,GUO J X,et al.Recovery of earth metals from NdFeB waste materials using hydrochloric acid[J].Hydrometallurgy of China,2006,25(4):195-197.
[6]尹小文,刘敏,赖伟鸿,等.草酸盐沉淀法回收钕铁硼废料中稀土元素的研究[J].稀有金属,2014,38(6):1093-1098.YI X W,LIU M,LAI W H,et al.The study of rare earth elements in NdFeB waste by oxalate precipitation[J].Chinese Journal of Rare Metal,2014,38(6):1093-1098.
[7]陈云锦.全萃取法回收钕铁硼废渣中的稀土与钴[J].中国资源综合利用,2004(6):10-12.CHEN Y J.Recovery of rare earths and cobalt from NdFeB magnets slurry by extraction method[J].China Resources Comprehensive Utilization,2004(6):10-12.
[8]王海滨,胡艳宏,李健飞,等.针铁矿法从氯化稀土料液中除铁研究[J].有色金属(冶炼部分),2021(11):59-64.WANG H B,HU Y H,LI J F,et al.Study on removal of iron from rare earth chloride solution by goethite method[J].Nonferrous Metals(Extractive Metallurgy),2021(11):59-64.
[9]吴继平,邓庚凤,邓亮亮,等.从钕铁硼废料中提取稀土工艺研究[J].有色金属科学与工程,2016,7(1):119-124.WU J P,DENG G F,DENG L L,et al.Rare earth recovery from NdFeB magnet scrap[J].Nonferrous Metals Science and Engineering,2016,7(1):119-124.
[10]DUTRIZAC J E,CHEN T T.Precipitation of hematite directly from ferric sulphate solutions[J].World of Metallurgy-ERZMETA LL,2011,64(3):134-150.
[11]黄孟阳,邓志敢,朱北平,等.湿法冶金工艺赤铁矿法除铁技术原理与应用[J].有色金属(冶炼部分),2019(6):1-6.HUANG M Y,DENG Z G,ZHU B P,et al.Theory and application of iron removal with hematite precipitation in hydrometallurgy[J].Nonferrous Metals(Extractive Metallurgy),2019(6):1-6.
[12]王益昭,李存兄,魏昶,等.赤铁矿法沉铁过程中铁矾的形成及转化[J].有色金属工程,2017,7(2):35-40.WANG Y Z,LI C X,WEI C,et al.Study on the formation and conversion of jarosite in the hematite process[J].Nonferrous Metals Engineering,2017,7(2):35-40.
[13]熊双贵,高之清.无机化学[M].武汉:华中科技大学出版社,2011:358-361.XIONG S G,GAO Z Q.Inorganic chemistry[M].Wuhan:Huazhong University of Science&Technology Press,2011:358-361.
[14]马荣骏.湿法冶金原理[M].北京:冶金工业出版社,2007:435-442.MA R J.Principle on hydrometallury[M].Beijing:Metallurgical Industry Press,2007:435-442.
[15]VOSHIYUKI U,TOZAWA K,SASAKI K.The hydrolysis of ferric sulphate solutions at elevated temperatures[J].Canadian Metallurgical Quarterly,1977,16(1):111-117.
[16]阳启华,吴金玲,王日,等.羟基氧化铁分离法回收钕铁硼废料的实验研究[J/OL].中国稀土学报:1-11[2024-08-25.http://kns.cnki.net/kcms/detail/11.2365.tg.20230613.1204.006.html.YANG Q H,WU J L,WANG R,et al.Study on recovery of rare earth elements from spent NdFeB magnets by iron oxyhydroxide method[J/OL].Journal of the Chinese Soc1ety of Rare Earths:1-11[2024-08-25].http://kns.cnki.net/kcms/detail/11.2365.tg.20230613.1204.006.html.
基本信息:
DOI：10.20237/j.issn.1007-7545.2025.02.014
中图分类号:TF845
引用信息:
[1]吴金玲,阳启华,王日,等.赤铁矿分离法回收钕铁硼废料[J].有色金属(冶炼部分),2025(02):133-139.DOI:10.20237/j.issn.1007-7545.2025.02.014.
基金信息:
中央高校基本科研业务费资助项目（FRF-TP-19-036A2）; 中国博士后科学基金资助项目（2018T110045）
2025-01-23
2025-01-23