Fine coal dry cleaning using a vibrated gas-fluidized bed

Dry cleaning of fine lignite in a vibrated gas-fluidized bed: Segregation characteristics

“…To avoid the impacts of surface moisture on the separation performance, the coal sample was air-dried. The particles were initially fluidized for 2 min according to our pervious study [22], and the fluidizing air was suddenly shut down. This static bed was divided into five layers in the axial direction.…”

“…Weight fractions x D were measured. In our previous studies [22], the separation performance was evaluated by a statistical indicator (S), which is defined as follows:…”

“…The segregation based on density difference is generally called ''density segregation,'' whereas that based on size difference is called ''size segregation.'' Yang et al [22] examined the separation performance of fine high-rank coals in a vibro-fluidized bed. Their studies indicated that the separation performance largely depends on operational parameters and feed particle properties.…”

Dry Cleaning of Fine Coal Based on Gas‐Solid Two‐Phase Flow: A Review

“…Yang et al , , introduced vibration energy into a gas‐fluidized bed of Geldart D type particles in order to improve the fluidization behavior. In their study, an i‐Speed 3 high speed camera was adopted to examine the fluidization process.…”

Comparative studies on the effect of mineral matter on physico-chemical properties, inherent moisture and drying kinetics of Chinese lignite

“…For the size of 1-3 mm, the dry beneficiation method using a special vibration fluidized bed can be found in our previous studies [14,36]. After fluidization for a certain time, this bed was divided into five layers in the axial direction and the ash content of each layer was measured.…”