硫磷混酸分解高镁尾矿渣制取磷镁复合肥的工艺条件研究  

Study on technologic conditions for production of P-Mg compound fertilizer with high Mg phosphate gangue in mixed phosphoric acid and sulfuric acid

作　　者：胡宏[1,2] 徐德龙[1] 段永华[1] 解田 

机构地区：[1]西安建筑科技大学,陕西西安710055 [2]瓮福(集团)有限责任公司

出　　处：《无机盐工业》2012年第2期53-55,62,共4页Inorganic Chemicals Industry

摘　　要：介绍了以硫磷混酸和高镁磷尾矿粉为原料制备磷镁复合肥的工艺条件,研究了硫酸用量、磷酸用量、反应时间和反应温度对五氧化二磷、氧化镁转化率的影响。通过单因素实验得到最佳的工艺条件:磷酸用量为110 g、硫酸用量为15 g、反应时间为20 min、反应温度为50℃。在此条件下,磷尾矿渣中五氧化二磷的转化率大于90%,氧化镁转化率大于80%。Technologic conditions for production P-Mg compound fertilizer with mixed phosphoric acid and sulfuric acid and high Mg phosphate gangue as raw materials were introduce＆Influences of factors ,such as sulfuric acid dosage ,phosphoric acid dosage, reaction time, and reaction temperature on conversion percents of P205 and MgO were studied.Through single factor experiment optimum technology conditions were obtained：phosphoric acid was 110 g, sulfuric acid was 15 g, reaction time was 20 min, and reaction temperature was 50 ℃ .Under the optimum conditions, conversion percent of P2O5 was more than 90% and conversion percent of MgO was over 80%.

关 键 词：硫磷混酸 高镁磷尾矿渣 磷镁复合肥 

分 类 号：TQ444[化学工程—化学肥料工业]