High gradient magnetic beneficiation of dry pulverized coal via upwardly directed recirculating fluidization

Patent · Tue Jan 01 04:00:00 EST 1980

OSTI ID:863612

Eissenberg, David M ^[1]; Liu, Yin-An ^[2]

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1. Oak Ridge, TN
2. Opelika, AL

This invention relates to an improved device and method for the high gradient magnetic beneficiation of dry pulverized coal, for the purpose of removing sulfur and ash from the coal whereby the product is a dry environmentally acceptable, low-sulfur fuel. The process involves upwardly directed recirculating air fluidization of selectively sized powdered coal in a separator having sections of increasing diameters in the direction of air flow, with magnetic field and flow rates chosen for optimum separations depending upon particulate size.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4212651
• OSTI ID: 863612
• Country of Publication: United States
• Language: English

Related Subjects

/44/209/
acceptable
air
air flow
ash
beneficiation
chosen
circulating air
circulating fluid
coal
depending
device
diameters
directed
direction
dry
dry pulverized
environmentally
environmentally acceptable
field
flow
flow rate
flow rates
fluidization
fuel
gradient
gradient magnetic
improved
improved device
increasing
involves
low-sulfur
magnetic
magnetic beneficiation
magnetic field
method
optimum
particulate
powdered
powdered coal
process
process involves
product
pulverized
pulverized coal
purpose
rates
recirculating
relates
removing
removing sulfur
sections
selectively
separations
separator
size
sized
sulfur
upwardly
upwardly directed
via
whereby