Process development for production of coal/sorbent agglomerates

Technical Report · Mon Jan 01 00:00:00 EST 1990

OSTI ID:6133208

Rapp, D M; Lytle, J M; Hackley, K C; Moran, D L ^[1]; Berger, R L ^[2]; Griggs, K ^[3]

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1. Illinois State Geological Survey, Champaign, IL (USA)
2. Illinois Univ., Urbana, IL (USA)
3. Army Construction Engineering Research Lab., Champaign, IL (USA)

Current coal mining and processing procedures produce significant quantities of fine coal with limited marketability. The objective of this work is to utilize these fines to economically produce a fuel which will meet anticipated sulfur dioxide emission levels. To accomplish this, the process of pelletizing fine coal with a sulfur capturing sorbent such as calcium hydroxide is being studied. Carbonation, which is the reaction of calcium hydroxide with carbon dioxide to produce a bonding matrix of calcium carbonate, is being investigated as a method for improving pellet quality and decreasing binder costs. Two potential combustion options are being considered - fluidized bed combustors and industrial stoker boilers. This project represents phase 2 of research in this area. Previous test results indicate that carbonation can improve compressive strength, impact and attrition resistance and essentially waterproofs pellets having a 14% lime content. Binders such as corn starch or molasses do not produce waterproof pellets capable of withstanding rainfall that might occur during shipping or outdoor storage. The past years work was conducted using IBC-106 ground to a particle size of 90% minus 90 microns. In this years work, testing will be performed using a flotation concentrate collected from an operating preparation plant. The sample was collected this quarter and is currently being processed. Also during this quarter, a carbonation reactor has been designed and will be fabricated early next quarter. To aid in pelletization work, an undergraduate civil engineering student has been hired and trained. Some pelletization work has been completed but results are too preliminary to report. 2 refs.

• Research Organization: Illinois Dept. of Energy and Natural Resources, Springfield, IL (USA)
• Sponsoring Organization: USDOE; USDOE, Washington, DC (USA)
• DOE Contract Number: FG22-90PC90176
• OSTI ID: 6133208
• Report Number(s): DOE/PC/90176-T2; ON: DE91010501
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
ADSORBENTS
BRIQUETTING
COAL
AGGLOMERATION
AIR POLLUTION ABATEMENT
BINDERS
BOILERS
CALCIUM CARBONATES
CALCIUM HYDROXIDES
CALCIUM OXIDES
COAL FINES
COMPRESSION STRENGTH
FLUIDIZED-BED COMBUSTORS
FRAGMENTATION
IMPACT STRENGTH
INDUSTRIAL PLANTS
MECHANICAL PROPERTIES
PARTICLE SIZE
PROGRESS REPORT
SOLID FUELS
SULFUR DIOXIDE
WATERPROOFING
ALKALINE EARTH METAL COMPOUNDS
CALCIUM COMPOUNDS
CARBON COMPOUNDS
CARBONACEOUS MATERIALS
CARBONATES
CHALCOGENIDES
COMBUSTORS
DOCUMENT TYPES
ENERGY SOURCES
FABRICATION
FOSSIL FUELS
FUELS
HYDROGEN COMPOUNDS
HYDROXIDES
MATERIALS
MOLDING
OXIDES
OXYGEN COMPOUNDS
POLLUTION ABATEMENT
SIZE
SULFUR COMPOUNDS
SULFUR OXIDES
010300* - Coal
Lignite
& Peat- Preparation- (1987-)