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投稿时间:2021-01-28 修订日期:2021-02-05
投稿时间:2021-01-28 修订日期:2021-02-05
中文摘要: 为探究新疆某砂岩铀矿床矿石的浸出性能,获得不同硫酸浓度条件下矿石的最优浸出条件及参数,对砂岩型铀矿石进行室内不同硫酸浓度(0.2~10 g/L)摇瓶浸出对比试验,液固比为5︰1,浸出环境温度为17 ℃,浸出周期96 h,一组添加300 mg/L双氧水,另一组不加氧化剂。试验结果表明,未添加氧化剂时,硫酸浓度为8 g/L时浸出率最大,酸度增加到10 g/L,铀浓度反而下降了5.78 mg/L,浸矿在48 h便几乎达到了平衡;酸度低于0.4 g/L时,浸出5 h便出现峰值,继续浸出,浸出率下降。添加氧化剂时,浸出率与硫酸浓度呈正相关,且添加氧化剂后浸出速率加快,但浸出平衡点无明显变化,当酸度低于0.6 g/L时,浸出后期出现铀浓度下降,硫酸浓度为8 g/L时,浸出率可达97.17%,硫酸浓度增加到10 g/L,浸出率并无明显增加。酸法浸出可应用于此铀矿床,且最佳浸出剂硫酸浓度为8 g/L。
Abstract:In order to explore leaching properties of a sandstone-type deposit in Xinjiang and obtain optimal leaching conditions and parameters under different sulfuric acid concentrations, uranium ore was leached in shake flask under different sulfuric acid concentration (0.2—10 g/L) with L/S of 5︰1, temperature of 17 ℃, leaching time of 96 h, and with 300 mg/L or without hydrogen peroxide. The results show that: 1) For the group without hydrogen peroxide, the highest uranium leaching rate is obtained when concentration of sulfuric acid is 8 g/L, whereas it drops to 5.78 mg/L with 10 g/L concentration of sulfuric acid. While acidity is lower than 0.4 g/L, peak value of uranium concentration will appear after 5 hours of leaching and drops later when leaching continues. Leaching almost reaches equilibrium within 48 hours. 2) For the group with hydrogen peroxide, uranium leaching rate is positively correlated with concentration of sulfuric acid, and leaching rate rises with addition of oxidant, but leaching equilibrium point does not change significantly. While the acidity is lower than 0.6 g/L, the uranium concentration decreases in the later stage of leaching. Uranium leaching rate can reach 97.17% when sulfuric acid concentration is 8 g/L. When sulfuric acid concentration rises to 10 g/L, uranium leaching rate does not increase significantly. Therefore, 8 g/L of acidity is the optimal concentration for this uranium deposit.
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基金项目:国家自然科学基金资助项目(42072285)
Author Name | Affiliation | |
WU Bing | East China University of Technology | 793383930@qq.com |
ZHOU Yi-peng | East China University of Technology | zyp721@163.com |
WANG Ting-jian | ||
XU Ling-ling | ||
LI Guang-rong |
引用文本:
吴冰,周义朋,王廷健,徐玲玲,黎广荣.新疆某铀矿床酸法浸出试验[J].有色金属(冶炼部分),2021(5):58-66.
WU Bing,ZHOU Yi-peng,WANG Ting-jian,XU Ling-ling,LI Guang-rong.Study On The Adaptability Of Acid Leaching In a Uranium Deposit In Xinjiang[J].Nonferrous Metals (Extractive Metallurgy),2021(5):58-66.
吴冰,周义朋,王廷健,徐玲玲,黎广荣.新疆某铀矿床酸法浸出试验[J].有色金属(冶炼部分),2021(5):58-66.
WU Bing,ZHOU Yi-peng,WANG Ting-jian,XU Ling-ling,LI Guang-rong.Study On The Adaptability Of Acid Leaching In a Uranium Deposit In Xinjiang[J].Nonferrous Metals (Extractive Metallurgy),2021(5):58-66.