TREATMENT METHOD FOR RECYCLING WASTE COAL TAILINGS

摘要

PURPOSE: A treatment method for recycling waste coal tailings as industrial material is provided to analyze mineralogical and physiochemical properties varied according to the generation state of waste coal tailings and apply sorting method according to characteristics of waste coal tailings so that it is recycled as raw material in various industries. CONSTITUTION: The treatment method comprises first crushing step (S1) of crushing the waste coal tailings to obtain a product having an inherent grain size of sand stone ore using a sack mill (S110) so that the waste coal tailings (S100) is screened in steps; scrubbing step (S120) of scrubbing the first crushed material using a rotary screen scrubber to obtain a product having equal grain size using a sieve having the same size of 5 mm as the sack mill (S110) to separate sand stone and coal that are not screened in steps in the first crushing step (S1); air classification step (S180) of classifying the scrubbed material using an air classifier to separate sand stone and coal having a grain size of 5 mm or less separated in the scrubbing step (S120); second pulverizing step (S190) of pulverizing a product having a grain size of -5 mm/150 meshes that is not separated in the air classification step (S180) using a pulverizer; second screening step (S200) of separating a product pulverized in the second pulverizing step (S190) to a constant grain size corresponding to a sieve size of 30 meshes; wet screening step (S210) of screening a product having a grain size corresponding to a sieve size of 30 meshes or less separated in the second screening step (S200); and dehydration step (S230) of dehydrating a product having a grain size corresponding to a sieve size of 150 meshes or less separated in the wet screening step (S210), wherein the resulting material is used as a ceramic base material (S6) by controlling moisture content of the resulting material to 15% or less.