Development of high-gradient and open-gradient magnetic separation

Conference · Thu Jan 01 00:00:00 EST 1981

OSTI ID:5315787

Hise, E C

This paper was prepared: to review the accomplishments in both high-gradient magnetic separation (HGMS) and open-gradient magnetic separation (OGMS) by the Oak Ridge National Laboratory (ORNL) group during the past three years; to show, through the medium of motion pictures, the operation of the various separation methods and devices used and developed; to show qualitative results of the separation performed; and to make available, to those interested, detailed reports of the experimental procedures and the resulting data. The qualitative separation of pyritic sulfur and ash forming minerals from fine coal by high gradient magnetic separation has been demonstrated at feed rates up to one ton per hour, and in a machine that is commercially produced in sizes for feed rates up to several hundred tons per hour. The quantitative separation of pyritic sulfur and ash forming minerals from fine coal by free fall open gradient magnetic separation has been demonstrated at a laboratory scale and at 300 kg per hour in a solenoidal magnet configuration. A magnet modeling analysis has shown that an optimum magnet can be designed with practical physical constraints which can generate separating forces two to three times those of the existing solenoidal configuration and with a large processing capacity. The analytical predictions of the behavior of particles traversing these separating forces have been experimentally confirmed within 15% in existing magnets.

• Research Organization: Oak Ridge National Lab., TN (USA)
• DOE Contract Number: W-7405-ENG-26
• OSTI ID: 5315787
• Report Number(s): CONF-8105161-1; ON: DE82015687
• Resource Relation: Conference: Symposium on advances in magnetic filtration, Salford, UK, 18 May 1981
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
COAL PREPARATION
MAGNETIC SEPARATORS
OPERATION
COAL
COAL FINES
DEASHING
DESULFURIZATION
MAGNETIC SUSCEPTIBILITY
MAGNETS
MATHEMATICAL MODELS
PARTICLE SIZE
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
COMMINUTION
CONCENTRATORS
ENERGY SOURCES
FOSSIL FUELS
FUELS
MAGNETIC PROPERTIES
MATERIALS
PHYSICAL PROPERTIES
SIZE
013000* - Coal
Lignite
& Peat- Transport
Handling
& Storage