Separation of pyrite from coal in a fluidized bed

Details Separation of pyrite from coal in a fluidized bed Separation of pyrite from coal in a fluidized bed

1991-04-16

1993-03-30

Favors, Edward

Furnaces

Process

Burning pulverized fuel

110218, 110220, 110232, 209 20, 209474, 209475, F23D 100

Patent

active

051973987

ABSTRACT:
Processes and arrangements that provide for the separation of pyrite from coal in a fluidized bed. The processes provide for more efficient and complete stratification of the bed materials in a vertical direction, so that the very top layer of the fluidized ved is coal having a reduced pyrite content. The process includes feeding the coal to be cleaned on top of a layer of magnetite. The process also includes fluidizing the bed until bed-bubbling separation occurs in the absence of steady-state conditions. The cleaned top layer of coal having a reduced pyrite content is then separated from the refuse coal in the bottom of the bed.

REFERENCES:
patent: 2303367 (1942-12-01), Kendall et al.
patent: 3539001 (1970-11-01), Binnik et al.
patent: 3774759 (1973-11-01), Weintraub et al.
patent: 3804250 (1974-04-01), Dankesreiter
patent: 4521303 (1985-06-01), Hicks et al.

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