氧压酸浸法从铌钛铀矿中选择性提取铀
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摘要
采用氧压酸浸工艺选择性提取铌钛铀复杂多金属矿石中的铀,并对浸出过程铀、铌、钛、铁等元素的溶出行为进行了研究。结果表明,在硫酸用量240g/kg、矿浆液固体积质量比1.5mL/g、浸出反应温度180℃、氧气分压0.5MPa、反应时间6h条件下,铀浸出率可达到97.2%,而铌、钛、铁等则留于浸出残渣中。实现了从复杂难破解多金属矿石中高效选择性提铀的目的。
Uranium was selective leached from complicated polymetallic ores betafite by oxygen pressure leaching.Dissolving performances of U,Nb,Ti and Fe were investigated.The results show that uranium leaching rate is 97.2%,and most of Nb,Ti and Fe remains in leaching residue under the optimum conditions including dosage of sulfuric acid of 240 g/kg,L/S of 1.5 mL/g,leaching temperature of 180℃,oxygen partial pressure of 0.5 MPa,and leaching time of 6 h.High efficiency selective extraction of uranium from complicated polymetallic ores is achieved.
Uranium was selective leached from complicated polymetallic ores betafite by oxygen pressure leaching.Dissolving performances of U,Nb,Ti and Fe were investigated.The results show that uranium leaching rate is 97.2%,and most of Nb,Ti and Fe remains in leaching residue under the optimum conditions including dosage of sulfuric acid of 240 g/kg,L/S of 1.5 mL/g,leaching temperature of 180℃,oxygen partial pressure of 0.5 MPa,and leaching time of 6 h.High efficiency selective extraction of uranium from complicated polymetallic ores is achieved.
引文
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[3]韩建设,张劲.钽铌水冶分解提取工艺及设备的进展[J].稀有金属与硬质合金,2003,31(4):27-31.
[4]PATRICK M BROWN,ROBERT A HARD,DONNA D HARBUCK,etal. Recoveryofmetalvalues:US7282187B1[P].2007-10-16.
[5]颜允富,战晓云,秦绍禹.从含铀钽铌渣中综合回收铀[J].铀矿冶,1994,13(2):94-97.
[6]郭冬发,李子颖,李伯平,等.一种从含铀的铌钽浸出尾渣中提取铀的方法:CN102312094A[P].2010-07-07.
[7]张卯均.浸矿技术[M].北京:原子能出版社,1994:239-246.
[8]陈丽杰,袁露成,黄林青,等.硫酸锌溶液净化除钴研究现状[J].湿法冶金,2018,37(4):255-259.
[9]刘松岩,何起,李秋菊,等.氧化铌的硫酸溶解机理研究[J].有色金属(冶炼部分),2018(7):35-39.
[10]郭青蔚,王肈信.现代铌钽冶金[M].北京:冶金工业出版社,2009:102-226.
[11]韦斌,傅晓恒,王龙龙,等.赤泥硫酸浸出金属钛实验的动力学研究[J].世界科技研究与发展,2008,30(6):697-699.
[12]孙红娟,周国彪,彭同江,等.硫酸浸出法从高钛型高炉渣富钛产物中提取钛[J].矿冶,2015,24(3):54-58.
[13]高良宾,赫冀成,徐红江.硫化锌精矿高温高压浸出技术[J].有色矿冶,2007,23(4):33-36.
[14]吴克明,孙大林,胡杰.湿法炼锌过程中除铁工艺的进展[J].矿产综合利用,2014(6):6-9.
[15]陈阜东.硫化锌精矿焙烧浸出与直接浸出结合提锌同时除铁的方法[J].湖南有色金属,2015,31(1):37-39.
[16]王德义,谌竟清,赵淑良,等.铀的提出与精制工艺学[M].北京:原子能出版社,1982:112-118.