Separation of flue-gas scrubber sludge into marketable products. Quarterly technical progress report, March 1, 1996--May 31, 1996

Technical Report · Sat Jun 01 04:00:00 EDT 1996

DOI:https://doi.org/10.2172/383051· OSTI ID:383051

Kawatra, S K; Eisele, T C

To reduce their sulfur emissions, many coal-fired electric power plants use wet flue-gas scrubbers. These scrubbers convert sulfur oxides into solid sulfate and sulfite sludge, which must then be disposed of. This sludge is a result of reacting limestone with sulfur dioxide to precipitate calcium sulfite and calcium sulfate. It consists of calcium sulfite, gypsum, and unreacted limestone or lime, with miscellaneous objectionable impurities such as iron oxides, silicates, and magnesium, sodium, and potassium oxides or salts. These impurities prevent many sludges from being utilized as a replacement for natural gypsum, and as a result they must be disposed of in landfills, which presents a serious disposal problem.

• Research Organization: Michigan Technological Univ., Houghton, MI (United States). Dept. of Metallurgical and Materials Engineering
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: FG22-93PC93214
• OSTI ID: 383051
• Report Number(s): DOE/PC/93214--T11; ON: DE96050437
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
20 FOSSIL-FUELED POWER PLANTS
ADSORPTION
CALCIUM CARBONATES
CALCIUM SULFATES
DESULFURIZATION
FLOTATION
FLUE GAS
FOSSIL-FUEL POWER PLANTS
GYPSUM
LIMESTONE
MATERIALS RECOVERY
PARTICLE SIZE
PROGRESS REPORT
SCRUBBERS
SLUDGES
SULFUR OXIDES
WASTE DISPOSAL
WASTE PRODUCT UTILIZATION