选择性浸出中低品位磷块岩实验研究  

Study of selective leaching of low-grade phosphate rock in acid

作　　者：王建蕊[1,2,3] 张杰[1,2,3] 莫樊[4] 毛瑞勇[1,2,3] 吴林[1,2,3] 

机构地区：[1]贵州大学矿业学院,贵州贵阳550025 [2]贵州省非金属矿产资源综合利用重点实验室 [3]贵州省优势矿产资源高效利用工程实验室 [4]贵州民族大学建筑工程学院

出　　处：《无机盐工业》2016年第5期13-15,共3页Inorganic Chemicals Industry

基　　金：国家自然科学基金项目(51164004);贵州省科技厅重大专项(黔科合重大专项[20116023])

摘　　要：用传统的选矿工艺,如物理分选或者浮选来富集含碳酸盐矿物的磷矿石都很困难,由于碳酸盐和磷酸盐矿物有极其相似的物理化学特性,一般沉积型磷矿石用焙烧和选择性酸浸的方法对其进行富集。选择性浸出是一种具有应用前景的富集方法。实验采用乙酸酸浸磷块岩,使白云石分解,达到富集磷矿的目的。结果表明:乙酸分解白云石的主要影响因素有反应温度、粒度、酸的浓度、反应时间等。在最佳实验条件下P2O5的质量分数从原矿的19.72%提高到33.78%,白云石的分解率为27.45%。The beneficiation of phosphate ores containing carbonate gangue by conventional techniques,such as physical separation methods or flotation,is very difficult due to the similarities in physic-chemical properties of constituent minerals present in the system.Generally,sedimentary phosphate ores can be processed by calcinations and selective acid leaching methods.The selective leaching with acetic acid is a promising beneficiation way.Acetic acid was used to reduce the carbonate content of the phosphate rock,in order to enrich the content of P2O5.Experiment result indicated：the main factors of influencing acetic acid decompose dolomite were temperature,particle size,acid concentration,and reaction time etc..Under the optimal operating conditions,it was found that the mass fraction of P2O5 could be raised from 19.72% to 33.78% along with corresponding decomposition rate of dolomite 27.45%.

关 键 词：磷块岩 选择性浸出 乙酸 

分 类 号：TQ126.3[化学工程—无机化工]