Study on Recycling Waste Water from V2O5 Extraction from the Stone Coal Leaching Solution
-
摘要: 以广西某地区的石煤为原料,采用直接酸浸—溶剂萃取的提钒工艺,对石煤浸出液萃取提钒废水进行循环利用试验。考察废水循环使用过程浸出液杂质Si、Fe、Al等的富集情况以及对工艺指标、产品质量的影响。研究结果表明,萃余液的循环使用对钒浸出率不产生明显影响;杂质Si不会在循环过程累积,杂质Fe、Al在循环过程中会累积到一定程度然后趋于稳定,不影响继续循环使用;萃余液的循环使用对五氧化二钒产品的质量也无太大影响,均能稳定产出符合GB3238-1987(V2O5-98)的产品。Abstract: Experiments for recycling waste water from the process of V2O5 extraction from stone coal leaching solution are carried out in which a V2O5 extraction process of direct acid leaching and solvent extraction is employed using stone coal obtained from a certain area of Guangxi Province as raw materials.Impurities(Si,Fe and Al etc.) formed in leaching solution and their influence on process index and product quality during wastewater recycling process are investigated.Results show that the leaching rate of vanadium is not remarkably affected by utilization of the recycled residual solution from extraction.Si does not accumulate while Fe and Al accumulate to a certain extent and then stabilize during recycling process,which exerts no influence on recycling of the waste water.The vanadium pentoxide produced steadily can meet the requirements of GB3238-1987(V2O5-98),which shows the product quality is not remarkably impacted by the recycling of residual solution.
-
Key words:
- stone coal /
- V2O5 /
- extraction /
- wastewater /
- recycling
-

计量
- 文章访问数: 74
- HTML全文浏览量: 16
- PDF下载量: 2
- 被引次数: 0