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| Roasting Process Kinetics of U-Mo Associated Ore and Clinker Leaching |
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Received:August 18, 2021
Revised:August 23, 2021
Accepted:August 25, 2021
Published Online:November 19, 2021
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| DOI：doi：10.3969/j.issn.1007-7545.2021.12.011 |
| KeyWord:U-Mo associated ore；sulfuric acid roasting；orthogonal experiment；non-isothermal kinetics；leaching |
| Author | Institution |
| LIU Kang |
核工业北京化工冶金研究院 |
| LIU Zhong-chen |
核工业北京化工冶金研究院 |
| LIU Hui-wu |
核工业北京化工冶金研究院 |
| WANG Zi-yang |
核工业北京化工冶金研究院 |
| WANG Gui-shuo |
核工业北京化工冶金研究院 |
| CHENG Hao |
核工业北京化工冶金研究院 |
| JIA Xiu-min |
核工业北京化工冶金研究院 |
| SHI Liu-yin |
核工业北京化工冶金研究院 |
| XIANG Qiu-lin |
核工业北京化工冶金研究院 |
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| Abstract: |
| For refractory U-Mo associated ore, sulfuric acid roasting method can effectively activate U, Mo component and achieve efficient extraction. The roasting orthogonal test results show that roasting temperature and time have great influence on leaching rate of U and Mo, mass ratio of acid to ore has more significant influence on U leaching rate, and concentration of sulfuric acid has more influence on Mo leaching rate. TG/DTG analysis results indicate that roasting process can be divided into three stages as 27.4~66.7, 66.7~141.1, 141.1~267.3 ℃, with reaction activation energy calculated via Kissinger differential method of 17.592, 16.878, and 38.660 kJ/mol, respectively. The optimum leaching parameters of sulfuric acid roasting clinker include leaching temperature of 80 ℃, leaching time of 3 h, and ratio of liquid to solid of 5 mL/g. |
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