熔融态高钙高磷钒渣氧化钠化—水浸提钒
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国家重点实验室资助项目(41603004)


Vanadium extraction from molten vanadium slag with high contents of Ca and P by direct oxidation and adding Na2CO3 and water leaching method
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Supported by key laboratory Foundation(41603004)

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    摘要:

    采用XRD对钠化高钙高磷钒渣(11.48%V2O3、13.71%CaO、0.78%P2O5)熟料的物相组成进行了分析,并研究了钒渣熟料提钒的最佳实验参数。结果表明:在Na2CO3加入量相对较少时(35%),V存在于Na4V2O7、Na3VO4、Na1.33V2O5和NaCaVO4中,随着Na2CO3加入量的增加,Na4V2O7和NaCaVO4会进一步与Na2CO3反应转化为Na3VO4;钒渣熟料中P存在于水溶性Na3PO4中;当实验条件如下:Na2CO3加入量为40%,液固比为5∶1 mL/g,浸出温度为90℃,浸出时间为4 min,搅拌速度为150 r/min,高钙高磷钒渣熟料浸出率可超过90%。可见,熔融态高钙高磷钒渣氧化钠化水浸提钒的方法可行。

    Abstract:

    The mineral phases of the clinker obtaining after oxidizing vanadium slag with high contents of Ca and P are analyzed by X-ray diffraction (XRD), and the experimental parameters of vanadium extraction are also investigated in this paper. The results show that V exists in the form of Na4V2O7, Na3VO4, Na1.33V2O5 and NaCaVO4 when the amount of added Na2CO3 is relatively small (35%). But, with the added Na2CO3 amount increasing, Na4V2O7 and NaCaVO4 react with Na2CO3, then change into Na3VO4. P in the clinker exists in the form of Na3PO4. The leaching rate of vanadium can reach above 90% under the conditions: added Na2CO3 amount of 40%, liquid to solid ratio of 5∶1 mL/g, leaching temperature of 90℃, leaching time of 4 min, stirring rate of 150 r/min. Therefore, the method of extracting vanadium from molten vanadium slag with high contents of Ca and P by direct oxidation and adding Na2CO3 and water leaching is feasible.

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李宏,王艳南,宋文臣.熔融态高钙高磷钒渣氧化钠化—水浸提钒[J].重庆大学学报,2015,38(2):138-142.

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  • 收稿日期:2014-12-11
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  • 在线发布日期: 2015-05-04
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