中低品位磷块岩P_2O_5富集实验  

Study on P_2O_5 enrichment in medium-low grade phosphate rock

作　　者：王建蕊[1] 张杰[1,2] 

机构地区：[1]贵州大学,贵州贵阳550003 [2]贵州省非金属矿产资源综合利用重点实验室,贵州贵阳550003

出　　处：《化工矿物与加工》2010年第10期1-4,共4页Industrial Minerals & Processing

基　　金：国家自然科学基金资助项目(批准号:50164001);贵阳市科学技术计划项目研究生创新基金(批准号:700838108)

摘　　要：为了探索新的P2O5及稀土元素富集方式,采用稀硫酸为浸出剂,对温度、液固比、硫酸质量分数及反应时间等影响磷块岩风化的因素进行了初步实验、单因素实验及正交实验,结果表明:当温度为40±3℃,硫酸质量分数2%,液固比4∶1,反应时间40 min时,含稀土磷块岩中P2O5的品位从26.13%富集到31.91%,富集率为22.12%;稀土元素的品位从0.054%富集到0.152%。This research focuses on new enrichment method of P2O5 and RE2O3. By using diluted sulfuric acid as leaching agent, weathering factors such as temperature,liquid-solid ratio, concentration of sulfuric acid and action time were studied. On the basis of preliminary experiment, single factor and orthogonal test, weathering process of phosphate rock was simulated to explore the optimal conditions of P2O5 and RF2O3 enrichment. The results show that the optimal enrichment conditions are as follows： temperature is around 40 ±3 ℃, sulfuric acid concentration is 2 %, liquid-solid ratio is 4 ： 1 and the action time is 40 min. Under the selected conditions, the grade of P2O5 in phosphate rock was enhanced from 26.13% to 31. 91%, obtaining an enrichment rate of 22. 12%, and meanwhile, RF2O3 grade was also enriched form 0. 054 % to 0. 152 %.

关 键 词：磷块岩 稀硫酸 P2O5富集 稀土 

分 类 号：TD971[矿业工程—选矿]