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| Resource Utilization of Ta-Nb Ore Smelting Slag |
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Received:September 19, 2021
Revised:September 19, 2021
Accepted:September 26, 2021
Published Online:October 20, 2021
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| DOI：doi：10.3969/j.issn.1007-7545.2021.11.019 |
| KeyWord:neutralization slag, recycling; radioactivity; technology improvement; Ta; Nb |
| Author | Institution |
| CHEN Zhi-dong |
1.广东省环境辐射监测中心 广州 |
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| Abstract: |
| A Ta-Nb ore smelting enterprise in Guangdong province mainly produces potassium fluotantalate and niobium oxide. It processes 130 t of tantalum concentrate and 220 t of ferrocolumbium tantalum as well as about 672 t of neutralization slag annually. However, due to the original processing without separation of acid-dissolved slag, neutralization slag and waste liquid, final waste volume is large and radioactive activity is high, which is difficult to treat and has left 10 kt of neutralization slag in factory. After technical improvement, including workshop wastewater treating, adding filter press, optimization of final discharge, construction of neutralization slag yard and recycling of neutralization slag, the slag and liquid separation has been realized, radioactivity reaches the standard and the historical neutralization slag has been recycled, which saves 30 million RMB cost of landfill and disposal of neutralization slag, and has obtained good economic, environmental and social benefits. |
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