利用磷尾矿合成新型缓释肥料聚磷酸钙镁的试验研究  

Experimental study on synthesis of new slow release fertilizer calcium magnesium polyphosphate from phosphate tailings

作　　者：郑建国 于南树 刘永秀 胡善明 胡兆平 ZHENG Jianguo;YU Nanshu;LIU Yongxiu;HU Shanming;HU Zhaoping(National Key Laboratory for Efficient Development and Comprehensive Utilization of Nutrient Resources,Kingenta Ecological Engineering Group Co., Ltd.,Linshu Shandong 276700,China;National Engineering Research Center for Slow and Controlled Release Fertilizer,Linshu Shandong 276700, China;Guizhou Provincial Phosphate Chemical Clean Production Engineering Technology Research Center,Wengan Guizhou 550400, China)

机构地区：[1]养分资源高效开发与综合利用国家重点实验室,金正大生态工程集团股份有限公司,山东临沭276700 [2]国家缓控释肥工程技术研究中心,山东临沭276700 [3]贵州省磷化工清洁生产工程技术研究中心,贵州瓮安550400

出　　处：《化工矿物与加工》2019年第7期64-67,71,共5页Industrial Minerals & Processing

基　　金：国家重点研发计划(2017YFD0200700);国家重点研发计划(2018YFC190062-5)

摘　　要：聚磷酸钙镁是一种新型肥料,最大的优点在于能提供聚合态的磷、钙、镁,且可以大量消耗磷酸系统产生的废弃物磷尾矿,达到资源综合利用及减少磷尾矿对环境的破坏的目的。其合成工艺主要为常温反应萃取后浓缩、干燥、煅烧,聚合度在1~4之间,磷的聚合率为80%左右,产品结构为多孔隙的球状结构。目前该生产装置已在磷资源丰富的贵州省开工建设,年生产能力为20万t。Calcium magnesium polyphosphate is a new kind of fertilizer.The biggest advantage of this product is that it can provide polymerized phosphorus,calcium and magnesium,and can consume a large amount of waste phosphate tailings generated by phosphoric acid system,so as to achieve the purpose of comprehensive utilization of resources and reduce the damage of phosphate tailings to the environment.Its synthesis process is mainly concentration,drying and calcination after reaction extraction at room temperature with the degree and rate of polymerization of phosphorus being between 1 and 4 and about 80%.The product structure is a porous spherical structure.At present,the production plant has started to be built in Guizhou,which is rich in phosphate resources, with an annual production capacity of 200,000 tons.

关 键 词：聚磷酸钙镁 磷尾矿 聚合态肥料 废弃物 新型肥料 

分 类 号：TD985[矿业工程—选矿]