盐酸浸取磷矿制酸的无除氟清洁工艺  

The Free-removing Fluorin Cleaning Process for Extracting Phosphoric Acid Produced by Hydrochloric

作　　者：范保安[1] 王广建[1] 陈学玺[1] 

机构地区：[1]青岛化工学院化工与制药工程学院,山东青岛266042

出　　处：《青岛化工学院学报（自然科学版）》2002年第3期23-26,共4页Journal of Qingdao Institute of Chemical Technology(Natural Science Edition)

摘　　要：利用盐酸浸取磷矿石 ,通过优化各工艺参数 ,控制有害杂质的浸出 ,实现了盐酸萃取磷酸的清洁工艺。过滤后的稀磷酸 ,不需添加任何除氟剂 ,就可以生产出符合行标要求的饲料级磷酸氢钙 ,其中的氟质量分数可低至 0 .0 41 % ,远低于 0 .1 8%的行业标准。矿石中的氟总量有 72 %集中在滤渣中 ,使滤渣中的氟质量分数达到 1 8.1 2 % 。This paper has studied the cleaning process for extracting phosphoric acid that is produced by hydrochloric acid by means of optimizing several technology parameters so decreasing the dissolve of detrimental impurity. Utilizing this process, after filtration, phosphoric acid can directly produce feed-grade calcium biphosphate that meet the trade standard without any free-fluorin agents. According to the result of the experiment, the percentage of fluorin in feed-grade calcium biphosphate is not more than 0.1 %. This number much less than request of the trade standard 0.18 %. The 72 % of fluorin element in phosphorite are concentrated in residue of filtration in which the percentage of fluorin amounts to 18.12 %. Thus it is possible to reclaim the fluorin element completely .

关 键 词：盐酸 浸取 磷矿制酸 无除氟清洁工艺 湿法磷酸 磷酸氢钙 

分 类 号：TQ126.35[化学工程—无机化工]