关键词: 工艺矿物学, 选钨尾砂, 嵌布关系, 粒度分布, 综合回收

Abstract: In order to fully recover valuable minerals from tungsten selection tailings,systematic process mineralogy of a micro-fine tungsten selection tailings in Jiangxi was studied by means of mineral automatic analyzer (MLA),chemical analysis,X-ray diffractometer (XRD) and scanning electron microscope.The results showed that:① The contents of Cu and WO3 in the sample are 0.11% and 0.29%,and the contents of WO3 reaches the lowest industrial ultilization grade.The content of gangue component SiO2 is 67.52%.② The grain yield of -0.038 mm is 55.28%,and the grain content of -0.075 mm is 83.82%,indicating the high fine grain content.Cu and WO3 are obviously enriched in -0.038 mm fine particles,while the contents in other particles are relatively low.Al2O3 is mainly enriched in -0.038 mm grain size,while the contents of Pb,Zn and Mo in each grain size are low.③ The mineral composition of the sample is very complex,and the metal minerals are mainly chalcopyrite,scheelite and wolframite.Non-metallic minerals are mainly quartz,muscovite,biotite,feldspar and chlorite.④ The appearance of chalcopyrite single crystal grains is often strip,angular or other irregular shape.Fine-grained chalcopyrite with angular shape is commonly associated with pyrite and muscovite.The appearance of scheelite single crystal particles is usually dense,massive or irregular.Irregular fine-grained scheelite is often wrapped in chlorite and fluorite.Wolframite single crystal particles are usually triangular,semiidiomorphic or allotriomorphic granular,and it is often impregnated by calcite and quartz.Muscovite mostly exists as lamellar monomer.Biotite is mainly plate-shaped or short columnar,hexagonal in cross section,and scaly in aggregate,most of which are monomers.The recovery target minerals are determined as copper sulfide minerals and mica minerals,and the flotation recovery process is designed as one roughing,three cleaning and one scavenging process,one roughing,five cleaning and one scavenging and medium ore combined dehydration process through analysis.

Key words: process mineralogy, tailings after tungsten selection, dissemination relationship, particle size distribution, comprehensive recovery