钙镁质磷矿石粒级解离特性对其浮选行为的影响研究  

Influence of Particle Liberation Characteristics of Calcium-Magnesium Phosphate Ore on Its Flotation Behavior

作　　者：杨俊 邱跃琴[1,2,3] 卯松 张覃[2,3,4] YANG Jun;QIU Yueqin;MAO Song;ZHANG Qin(School of Mining,Guizhou University,Guiyang 550025,Guizhou,China;National&Local Joint Laboratory of Engineering for Effective Utilization of Regional Mineral Resources from Karst Areas,Guiyang 550025,Guizhou,China;Guizhou Key Laboratory of Comprehensive Utilization of Non-metallic Mineral Resources,Guiyang 550025,China;Guizhou Academy of Science,Guiyang 550001,Guizhou,China)

机构地区：[1]贵州大学矿业学院,贵州贵阳550025 [2]喀斯特地区优势矿产资源高效利用国家地方联合工程实验室,贵州贵阳550025 [3]贵州省非金属矿产资源综合利用重点实验室,贵州贵阳550025 [4]贵州科学院,贵州贵阳550001

出　　处：《矿冶工程》2023年第1期50-54,共5页Mining and Metallurgical Engineering

基　　金：国家重点研发计划(2018YFE0110300)。

摘　　要：以中低品位钙镁质磷矿石为原料,研究了磨矿细度-0.075 mm粒级占56.74%磨矿产品中的粗粒级(+0.15 mm、-0.15+0.106 mm和-0.106+0.075 mm)和细粒级(-0.075+0.038 mm和-0.038 mm)颗粒解离特性对浮选行为的影响。使用X射线荧光光谱分析和X射线粉末衍射分析各粒级不同矿物组分含量,结合扫描电镜背散射扫描分析各粒级连生体及单体解离情况,发现单体矿物含量随粒径减小而增多,氟磷灰石主要富集在+0.075 mm粗粒级中,白云石主要集中在-0.075 mm细粒级中。增强-0.038 mm粒级中有用矿物和脉石矿物选择性聚集,可减少P2O5损失;减少+0.075 mm粗粒级含量、同时增加-0.075+0.038 mm粒级含量,可以有效提高精矿中P2O5品位和回收率。A medium-low grade calcium-magnesium phosphate ore was ground to a fineness of 56.74%-0.075 mm and was used to study the liberation characteristics of particle size within varied ranges on its flotation behavior. The particles were classified into coarse ranges(+0.15 mm,-0.15+0.106 mm and-0.106+0.075 mm) and fine ranges(-0.075+0.038 mm and-0.038 mm). The content of different minerals in each size range was estimated by using X-ray fluorescence spectroscopy and X-ray powder diffraction analysis, while the intergrowth and monomer liberation was evaluated with the backscattering images obtained from scanning electron microscopy. It is found that the content of liberated minerals increases as the particle size decreases. Fluorapatite is primarily enriched in the coarser particles within the size range of+0.075 mm, whereas dolomite is concentrated mainly in fine particles of-0.075 mm. By improving the selective aggregation of valuable minerals and gangues in size range of-0.038 mm, the P2O5loss can be reduced. Furthermore, by reducing the content of coarse particles within the size of +0.075 mm and increasing the content of particles within-0.075+0.038 mm range, both P2O5grade and recovery of the concentrates can be effectively improved.

关 键 词：钙镁质磷矿 解离特性 浮选 

分 类 号：TD923[矿业工程—选矿]