混酸法制取高浓度富过磷酸钙工艺条件的试验研究  

Experimental study on technological conditions for manufacture of high analysis enriched superphosphate by mixed acid process

作　　者：廖昆生 王应华 

机构地区：[1]云南昆阳磷肥厂,云南晋宁650604

出　　处：《磷肥与复肥》2004年第1期15-19,共5页Phosphate & Compound Fertilizer

摘　　要：介绍采用硫酸、磷酸混合分解磷矿粉制高浓度富过磷酸钙〔w(P2 O5有效)～ 34%〕的试验过程 ,研究混酸用量、混酸浓度、混酸温度、磷酸替代率等工艺条件对磷矿分解率的影响 ,经正交试验 ,确定了制备的最佳工艺条件 :混酸w(H3 PO4+H2 SO4) 6 6 %～ 6 9% ,混酸温度 70～ 80℃ ,磷酸替代率 5 0 %～ 5 4 % ,混酸用量为理论酸用量的 93%～ 97%。The experiment is introduced for high analysis enriched superphosphate〔available w (P_2O_5) ～34%〕by sulfuric and phosphoric acid mixture decomposing ground phosphate rock. The influences of mixed acid consumption, concentration, temperature and alternated phosphoric acid amount on acidulated rate of phosphate rock are discussed. The optimum technological parameters are also determined by orthogonal experiments for mixed acid w (H_3PO_4+H_2SO_4)66%～69%,temperature 70～80℃, alternated rate of phosphoric acid 50%～54%, mixed acid consumption 93%～97% theoretical acid consumption. Some factors disturbing slurry solidified and quality controlled are analyzed.

关 键 词：富过磷酸钙 混酸法 分解率 正交试验 

分 类 号：TQ442.12[化学工程—化学肥料工业]