Characteristics of pressure fluctuations and fine coal preparation in gas-vibro fluidized bed

- A gas-vibro fluidized bed with magnetic powder as heavy medium was proposed for coal preparation.
- Relationship among pressure fluctuation, bubble behavior and separation efficiency was analyzed.
- Ash content of coal sample (3-6 mm size) could be reduced from 42.55% to 16.54%.
- Sulfur content in cleaned coal decreased efficiently.