Apparatus for magnetic separation of paramagnetic and diamagnetic material
Abstract
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 quadropole 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 cleanmore »
- Inventors:
-
- Glen Ellyn, IL
- Issue Date:
- Research Org.:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- OSTI Identifier:
- 866744
- Patent Number(s):
- 4778594
- Assignee:
- University of Chicago (Arch Development Corp.) (Chicago, IL)
- Patent Classifications (CPCs):
-
B - PERFORMING OPERATIONS B03 - SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS B03C - MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS
- DOE Contract Number:
- W-31109-ENG-38
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- apparatus; magnetic; separation; paramagnetic; diamagnetic; material; relates; methods; segregating; particles; particulate; particular; gradient; ash; producing; components; pyritic; sulfur; coal; vertical; cylinder; rotatable; screw; positioned; helical; blade; angled; downwardly; outwardly; axis; rotation; causes; denser; migrate; outside; dense; organic; portion; towards; center; vibration; mechanism; attached; vibrate; agitating; accommodating; segregation; field; applied; circumferentially; entire; length; superconducting; quadropole; magnet; segregates; directed; storage; bin; suitable; relatively; clean; combustion; magnetic separation; lean combustion; magnetic particles; entire length; particulate material; magnetic field; magnetic material; pyritic sulfur; organic portion; gradient magnetic; screw position; blade angle; dense particles; magnetic particle; /209/
Citation Formats
Doctor, Richard D. Apparatus for magnetic separation of paramagnetic and diamagnetic material. United States: N. p., 1988.
Web.
Doctor, Richard D. Apparatus for magnetic separation of paramagnetic and diamagnetic material. United States.
Doctor, Richard D. Fri .
"Apparatus for magnetic separation of paramagnetic and diamagnetic material". United States. https://www.osti.gov/servlets/purl/866744.
@article{osti_866744,
title = {Apparatus for magnetic separation of paramagnetic and diamagnetic material},
author = {Doctor, Richard D},
abstractNote = {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 quadropole 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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Jan 01 00:00:00 EST 1988},
month = {Fri Jan 01 00:00:00 EST 1988}
}