De-mixing characteristics of fine coal in an air dense medium fluidized bed

Conventional and recent advances in gravity separation technologies for coal cleaning: A systematic and critical review

“… [ 225 , 226 ] Medium density Higher bulk density of medium resulted in higher separation efficiency. [ 188 ] Time Increasing time results in the increase of segregation efficiency [ 227 , 228 ] Bed height Increasing the bed height could lower the fluidization performance and cause lower separation efficiency [ 57 , 180 , 196 , 222 , 223 ] Bubble size Smaller bubble size results in lower ash content in the product. [ 229 ] …”

“…These studies were carried out using various monitoring systems or equipment like densimeter [ 188 ], flowmeter or rotameter [ 173 , [188] , [189] , [190] , [191] , [192] , [193] , [194] , [195] , [196] , [197] ], manometer [ [188] , [189] , [190] , 193 , 194 , 196 , 198 ], pressure meter [ 188 , 190 , 191 , 197 , 199 ] and high speed camera [ 173 , 193 , 195 , 196 , 199 ]. In addition, systems control (i.e., density control [ 200 , 201 ] and flow control [ 195 ] were applied to measure and optimize separation.…”

An Efficient Model for Predicting the Segregation Profile of Binary Fluidized Beds

“…As described in the previous sections, there are some variables having a clear influence on the mixing and segregation phenomena such as density ratio, particle-sized ratio, total jetsam mass fraction, and fluidization velocity [5,[33][34][35].…”