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有色金属(冶炼部分):2021,(4):71-75
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某黑色页岩铀钒矿酸浸工艺研究
贾秀敏, 黄永, 陈天宝, 刘会武, 刘忠臣, 刘智, 向秋林
(核工业北京化工冶金研究院)
Study on Acid Leaching Technology of Black Shale Uranium Vanadium Ore
JIA Xiu-min, HUANG Yong, CHEN Tian-bao, LIU Hui-wu, LIU Zhong-chen, LIU Zhi, XIANG Qiu-lin
(Beijing Research Institute of Chemical Engineering and Metallurgy,CNNC)
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投稿时间:2020-11-13    修订日期:2020-11-23
中文摘要: 采用浓酸熟化工艺浸出某黑色页岩铀钒矿中的铀和钒,同时进行了在浸出过程中三价铁的去除研究。试验确定的最佳熟化条件为:酸用量12%、熟化温度90 ℃、熟化时间2.5 h、矿石粒度-0.15 mm;浸出条件为:室温水浸1 h后,加入硫酸钠0.6%,95 ℃下沉矾,沉矾时间0.5 h,浸出终点pH为1.2。在上述条件下,铀浸出率大于92%,钒浸出率大于68.5%,三价铁去除率大于75%。采用该工艺可有效降低后续金属分离及废水处理过程的试剂消耗。
中文关键词: 黑色页岩  铀钒矿  酸浸  除铁
Abstract:Uranium and vanadium were extracted from a black shale through acid curing leaching process, and removal of Fe(Ⅲ) during leaching was studied. The results show that the ore can be treated under the optimum curing conditions of acid dosage of 12%, curing temperature of 90 ℃, aging time of 2.5 h and ore size of -0.15 mm, and then leached by water for 1 h at room temperature, Fe(Ⅲ) is removed under the conditions of sodium sulfate adding amount of 0.6%, precipitation temperature of 95 ℃, precipitation time of 0.5 h and leaching terminal pH value of 1.2. Under the above steps and conditions, uranium leaching rate is more than 92%, vanadium leaching rate is more than 68%, and removal rate of Fe(Ⅲ) is more than 75%. This process can effectively reduce reagent consumption in subsequent metal separation and wastewater treatment process.
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基金项目:中核集团
引用文本:
贾秀敏,黄永,陈天宝,刘会武,刘忠臣,刘智,向秋林.某黑色页岩铀钒矿酸浸工艺研究[J].有色金属(冶炼部分),2021(4):71-75.
JIA Xiu-min,HUANG Yong,CHEN Tian-bao,LIU Hui-wu,LIU Zhong-chen,LIU Zhi,XIANG Qiu-lin.Study on Acid Leaching Technology of Black Shale Uranium Vanadium Ore[J].Nonferrous Metals (Extractive Metallurgy),2021(4):71-75.

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