优化过滤操作降低硝酸钙中P_2O_5含量  

Optimizing the filtration process to reduce the P_2O_5 content in calcium nitrate in production of nitrophosphate

作　　者：张红兵[1] 高瓦玲 何俊伟[1] 

机构地区：[1]天脊煤化工集团有限公司,山西潞城047507

出　　处：《磷肥与复肥》2008年第3期40-41,46,共3页Phosphate & Compound Fertilizer

摘　　要：硝酸分解磷矿,过滤分离酸解液与Ca(NO3)2.4H2O结晶(CN),要求CN中w(P2O5)<0.5%,以利CN下一步转化反应顺利进行和提高磷利用率。讨论CN中P2O5含量高的原因及相应解决措施,取得使CN中w(P2O5平均)从0.50%下降为0.47%的效果,磷利用率提高,年创经济效益38万元。The reaction of nitric acid decomposing phosphate rock demands that w（P2O5）of Ca （NO3）2- 4H2O crystal （CN ） is less than 0.5% in acidolysis solution separation, which can contribute to further conversion reaction and improve phosphorus utilization. The reasons that cause w （ P2O5 ） high in CN and relevant measures are discussed for solving the problem. The effect that w（P2O5） drops to 0.47% from 0.50% has been achieved, and annual economic benefit of 0.38 million RMB Yuan can be obtained from improvement of phosphorus utilization rate.

关 键 词：硝酸磷肥 四水硝酸钙结晶 P2O5含量 优化过滤操作 

分 类 号：TQ442.6[化学工程—化学肥料工业]