浓磷酸沉降与澄清技术的进展

Progress for Precipitation and Clarification Technologies of Concentrated Phosphoric Acid

介绍了云天化云峰分公司产能为28万t/a磷酸装置,针对磷矿品位的不断下降,杂质含量的不断升高,造成酸品质差,波动较大,从而影响到下游磷复肥产品的问题,采用了浓磷酸沉降与澄清技术,并改变絮凝剂加入方式。结果表明,2013年1-7月浓酸含固量平均为0.917%,为生产合格的18-46-0的DAP创造了条件。

Author has introduced the phosphoric acid plant with a capacity of 280 000 t / a in the Yuntianhua Yunfeng Sub-company,in allusion to going down for phosphorus ore grade,impurity content was continuously increased,acid product quality was decreased with more fluctuation,therefore having formed the problem influencing downstream phosphoric compound fertilizer product,precipitation and clarification technologies were adopted for the concentrated phosphoric acid,and the adding type for flocculent was changed. Result indicates that the solid content in concentrated phosphoric acid is averagely 0. 917% during January to July month in 2013,it creates a condition for producing qualified DAP with a ratio of 18-46-0.