Apparatus for magnetic separation of paramagnetic and diamagnetic material
The present invention relates to methods and apparatus for segregating paramagnetic from diamagnetic particles in particulate material and, in particular, to the open gradient magnetic separation of ash producing components and pyritic sulfur from coal. The apparatus includes a vertical cylinder and a rotatable vertical screw positioned within the cylinder, the screw having a helical blade angled downwardly and outwardly from the axis. Rotation of the vertical screw causes denser particles, which in the case of coal include pyritic sulfur and ash, which are paramagnetic, to migrate to the outside of the screw, and less dense particles, such as the low sulfur organic portion of the coal, which are diamagnetic, to migrate towards the center of the screw. A vibration mechanism attached to the screw causes the screw to vibrate during rotation, agitating and thereby accommodating further segregation of the particles. An open gradient magnetic field is applied circumferentially along the entire length of the screw by a superconducting quadrupole magnet. The open gradient magnetic field further segregates the paramagnetic-particles from the diamagnetic particles. The paramagnetic particles may then be directed from the cylinder into a first storage bin, and the diamagnetic particles, which are suitable for relatively clean combustion, may be directed into a second storage bin. 5 figs.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- DOE Contract Number:
- W-31109-ENG-38
- Assignee:
- Dept. of Energy
- Application Number:
- ON: DE87007201
- OSTI ID:
- 6742302
- Resource Relation:
- Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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Apparatus for magnetic separation of paramagnetic and diamagnetic material
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Related Subjects
COAL
DEASHING
DESULFURIZATION
MAGNETIC SEPARATORS
DESIGN
COAL PREPARATION
DIAMAGNETISM
MECHANICAL VIBRATIONS
MOISTURE
PARAMAGNETISM
PYRITE
SUPERCONDUCTING MAGNETS
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTIONS
CONCENTRATORS
ELECTRICAL EQUIPMENT
ELECTROMAGNETS
ENERGY SOURCES
EQUIPMENT
FOSSIL FUELS
FUELS
IRON COMPOUNDS
IRON SULFIDES
MAGNETISM
MAGNETS
MATERIALS
MINERALS
SULFIDE MINERALS
SULFIDES
SULFUR COMPOUNDS
SUPERCONDUCTING DEVICES
TRANSITION ELEMENT COMPOUNDS
010300* - Coal
Lignite
& Peat- Preparation- (1987-)