Characteristics Of Inclusions In Vein Quartz And Its Effect On Purification Of High-purity Quartz

High-purity quartz is originally based on secondary natural crystal as raw material,and then selected purification processing.At present,the quartz mineral resources which can be used as industrial application have 7 kinds of genetic types,they are natural crystal,quartz sandstone,quartzite,pulse quartz,powder quartz,natural quartz sand and granite quartz.With the rapid development of photovoltaic industry,laser,semiconductor,information technology and other high-end industries in recent years,the market demand of high-purity quartz is increasing rapidly,and the secondary crystal resources in our country are scarce,and the process of preparing high purity quartz from pulse quartz has been paid more and more attention.Vein Quartz has been selected by many countries as a high quality ore source because of its single mineral composition and good processing and purification effect.However,not all of the vein quartz is suitable for the preparation of high-purity quartz,the impurity content of quartz in vein quartz formed under different geologic background is quite large,,which has a great impact on the preparation of high-purity quartz.In this paper,the characteristics of the inclusions in the quartz veins are studied and discussed by using the quartz samples from different habitats.Vein quartz samples are mainly milky white,white,transparent-translucent,glass luster,grease luster.The microscopic observation shows that the quartz crystal is relatively small,the thin surface is clean,the wave shape disappears,the quartz has obvious deformation under the stress,Quartz's sub particle phenomenon and recrystallization phenomenon are obvious,and have different extinction phenomena.The quartz crystal in inferior vein quartz is relatively large,the flake surface is cloudy,the strip disappears,the tectonic fissure and the microscopic fissure develop greatly.The mineral inclusions in quartz veins of different quality were compared with those of quartz.The composition of mineral inclusions is mainly feldspar and mica.Mica is mainly distributed in quartz particles,random distribution,for flake or in the form of aggregates,the size of the main 20?m?200?m,interference color is obvious,in the three types of quartz veins are distributed.Feldspar is mainly distributed between the cracks of quartz grains,it is the self-30?m?100?m plate,the particle size is the same,and distributes in the superior veins quartz and inferior vein quartz.Pyroxene-like mineral inclusions were found in medium-vein quartz.In addition,the pulse quartz contains a small number of metal elements,according to the electron probe energy spectrum qualitative analysis and back-shot electronic image judged as cadmium element.From the comparison of fluid inclusions in quartz of different quality veins,the primary inclusions in the upper veins quartz are larger,the individual is bigger,the size is 2?20?m,and the gas-liquid two-phase inclusions are the main ones.In medium vein quartz,the inclusions are small,the size is 1?15?m,the primary inclusions and secondary inclusions are distributed,the gas-liquid two-phase inclusions are the main ones,and a few inclusions are visible.The inclusions in the inferior vein quartz are mainly secondary inclusions,the size of the inclusions is generally 1?8?m,and the secondary inclusions are mostly developed along the quartz micro-fissure.