Separation of flue-gas scrubber sludge into marketable products. Third quarterly technical progress report, June 1, 1994--August 31, 1994
This project is studying the characteristics of flue-gas scrubber sludges from several sources. This will facilitate the development of purification technologies which will make it possible to directly utilize scrubber sludges rather than landfilling them This purification will consist of minimal-reagent froth flotation, using the surface properties of the particles of unreacted limestone to remove them and their associated impurities from the material, leaving a purified calcium sulfite/gypsum product. The objectives of this project are to: Investigate properties of scrubber sludge that will control its behavior in separation processes, and determine how the surface properties of the sludge particles change as the conditions in solution change; examine the ability of various froth-flotation processes to separate the various components based on differences in their surface chemistry; and determine methods for accomplishing the separation without adding additional chemical hazards to the environment. During the fourth quarter, studies of the Zeta potentials of the individual sludge components were continued. These measurements are initially being made on chemically pure calcium sulfite, calcium carbonate, and gypsum, to establish a baseline for comparison for the actual sludge samples. These measurements are being used to determine the solution conditions that produce the greatest differences in the surface properties of the various types of particles in the sludge, and which will therefore produce the sharpest possible flotation separation. The details of these studies are presented in the following sections.
- 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:
- 10192796
- Report Number(s):
- DOE/PC/93214-T4; ON: DE95002427; BR: AA1525050
- Resource Relation:
- Other Information: PBD: Sep 1994
- Country of Publication:
- United States
- Language:
- English
Similar Records
Separation of flue-gas scrubber sludge into marketable products. Second quarterly technical progress report, December 1, 1993--February 28, 1994 (Quarter No. 2)
Separation of flue-gas scrubber sludge into marketable products. Second year, second quarterly technical progress report, Quarter No. 6, December 1, 1994--February 28, 1995
Related Subjects
20 FOSSIL-FUELED POWER PLANTS
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
FOSSIL-FUEL POWER PLANTS
FLUE GAS
DESULFURIZATION
SOLID WASTES
SLUDGES
WASTE PRODUCT UTILIZATION
SURFACE PROPERTIES
SEPARATION PROCESSES
SCRUBBERS
PROGRESS REPORT
EXPERIMENTAL DATA
GYPSUM
CALCIUM CARBONATES
CALCIUM COMPOUNDS
SULFITES
FLOTATION
010800
200202
320305
WASTE MANAGEMENT
NOXIOUS GAS AND PARTICULATE EMISSIONS
INDUSTRIAL WASTE MANAGEMENT