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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。
In view of the fact that carbonated leachate with high calcium, high phosphorus and vanadium slag can not be directly used in the current industrial production of vanadium precipitation process, vanadium carbonate vanadium slag carbonation leaching solution is subjected to vanadium precipitation test by ammonium carbonate vanadate and leaching process Residue generated wash water and vanadium precipitated vanadium wash water generated during mixing and evaporation and concentrated with vanadium Shen Shen solution, as a leaching agent again for leaching. After five cycles, the results showed that the content of V2O5 in the V2O5 product tested was more than 99%, all the components were in line with the industry standards, and the recycling of wastewater was realized.