无机盐工业

无机盐工业 ›› 2008, Vol. 0 ›› Issue (10): 0-0.

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湿法磷酸一步法脱色脱氟工艺中脱氟影响因素研究

郭昌明,黎铉海,刘丽芬,孙朋波   

  • 出版日期:2008-10-10 发布日期:2008-10-10

Study on influencing factors of defluorination in single-step decolorization anddefluorination technology of wet-process phosphoric acid

Guo Changming,Li Xuanhai,Liu Lifen,Sun Pengbo   

  • Online:2008-10-10 Published:2008-10-10

摘要: <FONT face=Verdana>摘要:对以活性炭和碳酸钠为脱色剂和脱氟剂的一步法脱色脱氟净化湿法磷酸工艺中脱氟影响因素进行了研究。以Gore膜为过滤介质,确定了湿法磷酸一步法脱色脱氟工艺中最佳脱氟工艺条件:反应温度70 ℃,反应时间90 min, 活性炭添加量为湿法磷酸处理质量的0.3%,碳酸钠添加量为湿法磷酸处理质量的2%,静置时间1 d。在此条件下,湿法磷酸脱氟率达到70%以上。<BR>中图分类号:TQ126.35&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;文献标识码:A&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;文章编号:1006-4990(2008)10-0023-03<BR></FONT>

Abstract: The influencing factors of defluorination in the single-step decolorization and defluorination technology of wet-process phosphoric acid (WPA) with activated carbon and Na<SUB>2</SUB>CO<SUB>3 </SUB>as decoloring agent and defluorinating agent were studied.Take Gore membrane as the filter medium,the best technological conditions of defluorination were drawn on the basis of experiments:reaction temperature was 70 ℃,reaction time was 90 min,dosage of activated carbon was 0.3%,dosage of Na<SUB>2</SUB>CO<SUB>3</SUB> was 2% of wet-process phosphoric acid,and sedimentation time was 1 d.Under these conditions,the defluorination rate reached above 70%.