Mineralogical and Liberation Studies of Pachemina Fluorite Ore, Mazandaran Province

Mineralogical and liberation studies are the most important parameters used in the selection of separation. An investigation was carried out toidentify the various types of minerals present in fluorite ore and to determine the suitability of the methods for its preconcentration and finalconcentration. The sample has been evaluated and characterized by ore microscopy, x ray diffraction, chemical analysis and also approximate mineralogy based on chemical analysis and Microscopic studies and also the texture characteristics such as grain size, Situation of infor lockedparticle and their arrangement in the ore body were also investigated. According to surveys conducted this ore contains of fluorite (40.52%), calcite (24%), quartz (20%), smitsonite (8%), galena (2%), clay minerals (3%), barite 1%) and goethite (0.6%). Carbonate phases is two parts sparry calcite, micrite to microsparate piece has been observed. Quartz, in the form of microcrystalline with limonite and goethite oxide of stained has been observed. The liberation degrees of crushed ore in different size fractions was estimated by the Counting method of showed that for fluorite (1000μm), Calcite (100μm) and quartz (90μm) of fluorite in size 100 mesh (150μm) with quartz (36%) and calcite (23%) were determined. The size fraction of -600, +425, can be assessed for gravity concentration as a preconcentration process and for the size fraction -150,+75 μm for flotation.