湿法磷酸生产中减压热空气法脱氟技术开发  

Development on defluorination technology by reduced pressure hot air method in wet-process phosphoric acid production

作　　者：何宾宾[1,2] 张晖[1,2] 傅英[1] 周琼波 赵智波 彭桦[1,2] 

机构地区：[1]云天化集团云南磷化集团有限公司,云南昆明650600 [2]国家磷资源开发利用工程技术研究中心,云南昆明650600

出　　处：《磷肥与复肥》2016年第8期14-15,共2页Phosphate & Compound Fertilizer

基　　金：十二五科技支撑计划<低品位胶磷矿及浮选磷尾矿节能环保高效综合利用>(2013BAB07B05)

摘　　要：饲料级磷酸氢钙生产要求湿法磷酸中m(P_2O_5)/m(F)≥250。采用减压热空气法脱氟技术,研究脱氟时间、空气温度、磷酸温度、磷酸浓度及真空度对脱氟效果的影响。结果表明:通过热空气脱氟将w(P_2O_5)48%的浓磷酸加入圆底烧瓶中,真空度为15 kPa,加入相当于F质量1倍的白炭黑,磷酸温度升至100℃,空气温度为100℃,反应1.5 h时磷酸中m(P_2O_5)/m(F)能达到300以上,满足饲料级磷酸氢钙用酸要求。The m （P2O5） /m （F） of wet-process phosphoric acid in feed grade calcium hydrogen phosphate production is required to more than 250. The defluorination technology by reduced pressure hot air method is used, the effects of defluorination time, air temperature, temperature and concentration of phosphoric acid, and vacuum degree on the defluorination effctiveness are studied. The results show that, through hot air defluorination, adding w （P2O5） 48% concentrated phosphoric acid to round bottom flask, vacuum degree of 15 kPa, adding white carbon black of double F content, phosphoric acid temperature of 100 ℃, air temperature of 100 ℃, at the time of 1.5 h m （P2O5） /m （F） can reach more phosphoric than 300, conforming to the requirement of phosphoric acid for feed grade calcium hydrogen phosphate production.

关 键 词：湿法磷酸 汽提法 白炭黑 减压热空气法脱氟 

分 类 号：TQ126.35[化学工程—无机化工]