磷渣酸高温活化低品位磷矿制备聚合态磷肥  

Preparation of polymeric phosphate fertilizer from low grade phosphate rock activated by phosphoric slag acid at high temperature

作　　者：李莹莹 孙玉翠 梅毅[1,2] 匡家灵 刘翠侠 马航 Li Yingying;Sun Yucui;Mei Yi;Kuang Jialing;Liu Cuixia;Ma Hang(Faculty of Chemical Engineering,Kunming University of Science and Technology,Kunming Yunnan 650500,China;Yunnan Provincial Key Laboratory of Energy Saving in Phosphorus Chemical Engineering and New Phosphorus Materials,Kunming Yunnan 650500,China;Development Center of Yunnan Yuntianhua Co.,Ltd.,Kunming Yunnan 650228,China;Yunnan ICL YTH Phosphate Research and Technology Center Co.,Ltd.,Kunming Yunnan 650228,China)

机构地区：[1]昆明理工大学化学工程学院,云南昆明650500 [2]云南省磷化工节能与新材料重点实验室,云南昆明650500 [3]云南云天化股份有限公司研发中心,云南昆明650228 [4]云南云天化以化磷业研究技术有限公司,云南昆明650228

出　　处：《化工矿物与加工》2024年第3期30-36,共7页Industrial Minerals & Processing

基　　金：云南省重大科技专项计划项目(202102AE090098,202102AE090053)。

摘　　要：以低品位磷矿和磷渣酸为主要原料,采用高温煅烧方法对其进行活化,制备了一种聚合态磷肥,通过单因素试验对反应条件进行了探索,得到的适宜反应条件为:聚合反应温度600℃、聚合反应时间40 min、原料配比m(酸P_(2)O_(5))/m(矿P_(2)O_(5))为2.5。在此条件下制备得到的聚合态磷肥为疏松多孔的块状结构,其中聚合磷质量分数为35.70%、聚合率为86.47%,有效磷质量分数为36.40%、占总磷的88%,钙、镁的有效占比分别为60.3%和75.6%,溶解试验结果显示该聚合态磷肥主要以枸溶性为主。A polymeric phosphate fertilizer was prepared by using low-grade phosphate rock and phosphate slag acid as the main raw materials and activated by the method of high-temperature calcination.The reaction conditions were explored through single factor test,and the appropriate reaction conditions were obtained as follows:polymerization reaction temperature of 600℃,polymerization reaction time of 40 minutes,raw material ratio of m(acid P_(2)O_(5))/m(mineral P_(2)O_(5))of 2.5.The polymerized phosphate fertilizer prepared under these conditions is a loose porous block structure,in which the mass fraction of polymerized phosphorus is 35.70%,the polymerization rate is 86.47%,the mass fraction of effective phosphorus is 36.40%,accounting for 88%of total phosphorus,and the effective proportions of calcium and magnesium is 60.3%and 75.6%,respectively.The results of dissolution test showed that the polymer phosphate fertilizer was mainly soluble in citric acid.

关 键 词：低品位磷矿 磷渣酸 聚合磷 高温聚合 聚合率 磷肥 

分 类 号：TQ444[化学工程—化学肥料工业]