碳酸铵沉钒废水循环利用的试验研究

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Recycle of Waste Water from Vanadium Precipitation by Ammonium Carbonate

1. Pangang Group Research Institute Co., Ltd., State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization, Panzhihua 617000, Sichuan, China;
2. School of Chemical Engineering, Kunming University of Science and Technology, Kunming 650500, Yunnan, China;
3. Metallurgical Geological Prospecting Bureau of Sichuan Province 601 Battalion, Panzhihua 617000, Sichuan, China

摘要: 针对高钙高磷钒渣碳酸化浸出液不能直接采用现有产业化沉钒工艺生产的现状,采用碳酸铵沉钒工艺对高钙高磷钒渣碳酸化浸出液进行沉钒试验,并将浸出过程中产生的残渣洗水与沉钒过程中产生的沉钒洗水混合蒸发浓缩后与沉钒上层液混合,作为浸出剂再次用于浸出。经过五次循环试验,结果表明:试验制备的V₂O₅产品中V₂O₅含量在99%以上,各组分均符合行业标准,并实现了废水的循环利用。
- 高钙高磷钒渣 /
- 碳酸铵 /
- 沉钒 /
- 废水循环利用
Abstract: In view of the present situation that the existing industrial technology for vanadium precipitation is not suitable for the carbonated leachate of vanadium slag with high content of calcium and phosphorus,the process of precipitating vanadium by ammonium carbonate ((NH₄)₂CO₃) was adopted for that leachate. The residue washing water in leaching process was mixed with the washing water for vanadium precipitation,concentrated by evaporation and then mixed with the upper-liquor of precipitating vanadium for the reuse as leaching agent. The results show that after 5 times of recycling every component of the obtained product meets the industry standard with more than 99% vanadium pentoxide (V₂O₅). It realized the recycle of waste water.
- vanadium slag /
- calcium /
- phosphorus /
- ammonium carbonate