Pulverized coal firing of aluminum melting furnaces. Final report. [Sulfide capacity of various slags in given temperature range]

Technical Report · Sun Apr 01 00:00:00 EST 1984

DOI:https://doi.org/10.2172/6841673· OSTI ID:6841673

Stewart, Jr., D. L.; Dastolfo, Jr., L. E.; DeYoung, D. H.

Significant progress has been achieved in the development of a desulfurizing coal combustion process by the Aluminum Company of America (Alcoa) in a research program funded by the United States Department of Energy. Conceptually, high sulfur coal is burned with additives in a staged cyclone combustor, such that sufficient sulfur to obviate products of combustion (POC) scrubbing is retained in the slag by-product. Bench scale studies conducted during the program have shown that 70% of the sulfur (2.65% sulfur coal) reports to the slag at equilibrium through a 25% addition of iron ore to the coal. Results obtained correlate with published data for similar slag at higher temperatures. In pilot scale combustion tests, equilibrium levels of coal sulfur were retained by the slag (11 to 14%). Equilibrium sulfur capture was limited by low particulate retention and operating temperature higher than optimal. Cost estimates for implementation of the process are included in this report. 28 references, 39 figures, 58 tables.

• Research Organization: Aluminum Co. of America, Alcoa Center, PA. Alcoa Technical Center
• DOE Contract Number: AC07-78CS40037
• OSTI ID: 6841673
• Report Number(s): DOE/CS/40037-T17; ON: DE84013093
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
20 FOSSIL-FUELED POWER PLANTS
ALUMINIUM
MELTING
COAL
STAGED COMBUSTION
CYCLONE COMBUSTORS
VERY HIGH TEMPERATURE
FLUE GAS
DESULFURIZATION
SLAGS
SOLVENT PROPERTIES
ADDITIVES
BURNERS
ECONOMICS
EXPERIMENTAL DATA
FURNACES
IRON ORES
PARTICULATES
PHASE DIAGRAMS
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
COMBUSTION
COMBUSTORS
DATA
DIAGRAMS
ELEMENTS
ENERGY SOURCES
FOSSIL FUELS
FUELS
GASEOUS WASTES
INFORMATION
MATERIALS
METALS
NUMERICAL DATA
ORES
OXIDATION
PARTICLES
PHASE TRANSFORMATIONS
THERMOCHEMICAL PROCESSES
WASTES
014000* - Coal
Lignite
& Peat- Combustion
200202 - Fossil-Fueled Power Plants- Waste Management- Noxious Gas & Particulate Emissions