Advanced physical fine-coal cleaning: Spherical agglomeration. Final report

Technical Report · Tue Jun 01 04:00:00 EDT 1993

OSTI ID:10179266

Huettenhain, H; Schaal, M ^[1]

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1. Bechtel National, Inc., San Francisco, CA (United States)

The project included process development, engineering, construction, and operation of a 1/3 tph proof-of-concept (POC) spherical agglomeration test module. The POC tests demonstrated that physical cleaning of ultrafine coal by agglomeration using heptane can achieve: Pyritic sulfur reductions beyond that possible with conventional coal cleaning methods; coal ash contents below those which can be obtained by conventional coal cleaning methods at comparable energy recoveries; energy recoveries of 80 percent or greater measured against the raw coal energy content; complete recovery of the heptane bridging liquid from the agglomerates; and production of agglomerates with 3/8-inch size and less than 30 percent moisture. Test results met or exceeded all of the program objectives. Nominal 3/8-inch size agglomerates with less than 20 percent moisture were produced. The clean coal ash content varied between 1.5 to 5.5 percent by weight (dry basis) depending on feed coal type. Ash reductions of the run-of-mine (ROM) coal were 77 to 83 percent. ROM pyritic sulfur reductions varied from 86 to 90 percent for the three test coals, equating to total sulfur reductions of 47 to 72 percent.

• Research Organization: Electric Power Research Inst., Palo Alto, CA (United States); Bechtel National, Inc., San Francisco, CA (United States)
• Sponsoring Organization: Electric Power Research Inst., Palo Alto, CA (United States)
• OSTI ID: 10179266
• Report Number(s): EPRI-TR--102633; ON: UN93019218
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010300
010402
AGGLOMERATION
COAL FINES
COAL PREPARATION
DEASHING
DESULFURIZATION
EPRI
HEPTANE
ILLINOIS
MATERIALS RECOVERY
PREPARATION
PURIFICATION AND UPGRADING
TEST FACILITIES