Continuous high-gradient magnetic separation of fine coal. Final report

Technical Report · Thu Dec 27 04:00:00 EST 1984

OSTI ID:5686430

Thomas, W A; Humphris, D A

The demonstration of continuous high-gradient magnetic separation (HGMS) at TVA's Paradise Coal Preparation Plant (PCPP) was the culmination of years of investigation by TVA and the Department of Energy (DOE) into a method for magnetically separating mineral matter from coal. Primarily intended for cleaning fine coal, HGMS was seen as an attractive alternative to froth flotation for the removal of sulfur. The HGMS trailer containing the pilot plant was installed at the PCPP in April 1983. The HGMS classifying cyclone characterization was completed in July 1983 and the Parametric Testing of the first matrix was completed in November 1983. Planned testing was halted at the end of the first set of parametric tests because of the inability of the HGMS pilot plant to meet the minimum performance criteria established by TVA at the beginning of the program. The criteria were: 50% ash reduction; 25% sulfur reduction; 50% pyritic sulfur reduction; and 90% Btu recovery. A detailed summary of the parametric test data is shown in Table 1. It is apparent that the best ash and sulfur reductions are obtained at the lower feed velocities and percent solids. The pilot plant appears to recover the heating value of the feed well while marginally reducing the sulfur and ash content. A test plant (Appendix A) was developed for testing the HGMS plant at Paradise. It consisted of the following sections: HGMS classifying cyclone characterization; parametric testing of two matrices; system optimization; froth flotation comparison; and long term testing. 2 refs., 4 tabs.

• Research Organization: Tennessee Valley Authority, Chattanooga (USA)
• DOE Contract Number: AI22-83PC62682
• OSTI ID: 5686430
• Report Number(s): DOE/PC/62682-T2; ON: DE85011236
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
013000* -- Coal
Lignite
& Peat-- Transport
Handling
& Storage
ADDITIVES
ASH CONTENT
CALORIFIC VALUE
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
COAL
COAL FINES
COAL PREPARATION
COAL PREPARATION PLANTS
COMBUSTION PROPERTIES
CONCENTRATORS
DATA
DEASHING
DESULFURIZATION
DIAGRAMS
ENERGY SOURCES
EXPERIMENT PLANNING
EXPERIMENTAL DATA
FLOWSHEETS
FOSSIL FUELS
FUELS
FUNCTIONAL MODELS
INDUSTRIAL PLANTS
INFORMATION
MAGNETIC SEPARATORS
MATERIALS
NATIONAL ORGANIZATIONS
NUMERICAL DATA
PILOT PLANTS
PLANNING
SEPARATION PROCESSES
SULFUR CONTENT
TENNESSEE VALLEY AUTHORITY
TESTING
US ORGANIZATIONS