Low-alumina portland cement from lime-soda sinter residue

Thesis/Dissertation · Thu Jan 01 00:00:00 EST 1987

OSTI ID:5752642

Chesley, J A

A byproduct for the Ames Lime-Soda Sinter Process for recovering alumina from power plant fly ash was investigated as a cement raw material. This investigation dealt with a determination of the best method to utilize the process residue from both a clinker quality and an economic perspective. The experimental work was divided into 4 major areas; characterization of the sinter residue, laboratory burnability tests, physical testing of produced residue-cements, and a kinetic study of C{sub 3}S formation. Other important topics were considered such as the effect use of the sinter residue has on the energy requirements of a commercial cement kiln and on the economics of a combined lime-soda sinter, cement plant. It was found that a low-alumina, C{sub 3}S-bearing cement could be readily produced from a raw mix containing significant amounts of sinter residue, which was found to consist of {beta}-C{sub 2}S, C{sub 3}A, CaCO{sub 3}, MgO, and C{sub 4}AF. Based on an energy balance using a typical cement feed containing around 75%{sub w} limestone as a reference, use of the residue in a cement feed allows for a 50% reduction in required energy for the kiln and a 32%{sub w} increased throughput. A laboratory produced residue-cement was found to meet all of the specifications for a Type 5 portland cement. The rate of return found for a combined lime-soda sinter and cement facility processing 43,800 tons per year (TPY) of alumina and 530,400 TPY of portland cement was 4.7%.

• Research Organization: Iowa State Univ. of Science and Technology, Ames, IA (USA)
• OSTI ID: 5752642
• Resource Relation: Other Information: Thesis (Ph. D.)
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
CEMENTS
WASTE PRODUCT UTILIZATION
LIME-SODA SINTER PROCESS
SOLID WASTES
ACTIVATION ENERGY
ALUMINIUM
ALUMINIUM OXIDES
CARBON SULFIDES
CHEMICAL ANALYSIS
CORROSION RESISTANCE
ECONOMICS
ENERGY CONSUMPTION
FLY ASH
KILNS
MATERIALS RECOVERY
MATERIALS TESTING
PORTLAND CEMENT
SPECIFICATIONS
SULFATES
SYNTHESIS
AEROSOL WASTES
ALUMINIUM COMPOUNDS
ASHES
BUILDING MATERIALS
CARBON COMPOUNDS
CHALCOGENIDES
ELEMENTS
ENERGY
MANAGEMENT
MATERIALS
METALS
OXIDES
OXYGEN COMPOUNDS
PROCESSING
RECOVERY
RESIDUES
SULFIDES
SULFUR COMPOUNDS
TESTING
WASTE MANAGEMENT
WASTE PROCESSING
WASTES
010800* - Coal
Lignite
& Peat- Waste Management