| 河南某地低品位含锂粘土矿提锂新工艺研究 |
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| 引用本文： | 李荣改,宋翔宇,高志,冯艳丽,李志伟.河南某地低品位含锂粘土矿提锂新工艺研究[J].矿冶工程,2014,34(6):81-84. |
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| 作者姓名： | 李荣改 宋翔宇 高志 冯艳丽 李志伟 |
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| 作者单位： | 1.河南省岩石矿物测试中心, 河南 郑州 450012;
2.河南省矿物加工与生物选矿工程技术研究中心, 河南 郑州 450012 |
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| 基金项目： | 国土资源部公益性行业科研专项 |
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| 摘 要： | 对河南某地低品位含锂粘土矿进行了试验研究。根据该矿石的工艺矿物学特性, 采用原矿(-2 mm)焙烧-常温浸出流程, 最优试验条件为: 焙烧温度800 ℃, 焙烧时间2 h, 硫酸钙/原矿比0.7, 氟化钙/原矿比0.2, 硫酸钠/原矿比0.2, 浸出时间1 h, 浸出温度20 ℃, 液固比3∶1, 硫酸浓度50%, 在此条件下锂浸出率为95.32%。在参考槽浸最佳条件的基础上进行了柱浸, 可以获得锂浸出率为91.78%的结果。
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| 关 键 词： | 含锂粘土矿 焙烧 浸出 锂 |
| 收稿时间： | 2014-06-17 |
New Technology for Extracting Li from Low-grade Lithium-bearing Clay |
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| LI Ronggai,SONG Xiangyu,GAO Zhi,FENG Yanli,LI Zhiwei.New Technology for Extracting Li from Low-grade Lithium-bearing Clay[J].Mining and Metallurgical Engineering,2014,34(6):81-84. |
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| Authors: | LI Ronggai SONG Xiangyu GAO Zhi FENG Yanli LI Zhiwei |
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| Affiliation: | 1.Henan Province Rock & Minerals Testing Center, Zhengzhou 450012, Henan, China;
2.Henan Engineering Research Center of Mineral Processing and Microbe Mineral Processing, Zhengzhou 450012, Henan, China |
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| Abstract: | A low-grade lithium-bearing clay from Henan Province was taken for study. According to the mineralogical characteristics, a process of roasting followed by leaching at normal temperature was adopted in the test with the ore at size of -2 mm. Under the following optimal testing conditions: roasting at 800 ℃ for 2 h with calcium sulfate/ore ratio at 0.7, calcium fluoride/ore ratio at 0.2 and sodium sulfate/ore ratio at 0.2, followed by the leaching at 20 ℃ for 1 h with liquid-solid ratio at 3∶1, sulfuric acid concentration of 50%, the leaching rate of Li reached 95.32%. Then a column leaching test was conducted with the best condition of tank leaching as reference, resulting in the leaching rate of Li up to 91.78%. |
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| Keywords: | lithium-bearing clay roasting leaching Li |
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