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RECORD NUMBER: 7 OF 8

OLS Field Name OLS Field Data
Main Title Study of the Potential for Profitable Utilization of Pulverized Coal Flyash Modified by the Addition of Limestone-Dolomite Sulfur Dioxide Removal Additives.
Author Cockrel, Charles F. ; Mute, Richard B. ; Leonar, Joseph W. ;
CORP Author West Virginia Univ., Morgantown. Coal Research Bureau.
Year Published 1969
Report Number PH-86-67-122;
Stock Number PB-185 802
Additional Subjects ( Air pollution ; Coal) ; ( Waste gases ; Removal) ; ( Limestone ; Waste gases) ; Economics ; Sulfur compounds ; Carbonates ; Calcium oxides ; Flotation(Separation) ; Soil mechanics ; Flyash ; Sulfur dioxide ; Carbonation ; Leaching ; Dolomite(Mineral)
Holdings
Library Call Number Additional Info Location Last
Modified
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Status
NTIS  PB-185 802 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/23/1988
Collation 105p
Abstract
One of the detriments to limestone or dolomite injection is the increase in solid wastes produced since the amount of flyash to be disposed of would be approximately doubled. Moreover, the flyash produced would be of little value in conventional flyash utilization schemes because of the large increases in lime, magnesia and sulfur. Two developments of this study involving concentration to recover lime and melting to yield sulfur derivatives and mineral wool have been linked together to form a preliminary conceptual plan for an Emission Control Minerals Complex (ECMC) to utilize all parts of modified flyash. The ECMC process involves slurrying modified flyash with water followed by carbonation of the slurry to convert unreacted lime and magnesia to their carbonate form, concentration of lime from the carbonated modified flyash by agglomerate flotation for reinjection into the furnace, melting of the concentration rejects for the manufacture of such products as mineral wool, and recovery of the relatively clean and more concentrated sulfur gases evolved from the melt for the manufacture of such products as sulfuric acid. In addition to the ECMC process several other potentially successful utilization methods were tested. It was determined that modified flyash had advantages over lime for acid mine drainage neutralization because of decreased sludge settling and filtering time. (Author)