Pulverized-coal firing of aluminum-melting furnaces. Fourth annual technical progress report, July 1981-June 1982

Technical Report · Thu Jul 01 00:00:00 EDT 1982

OSTI ID:5116784

Stewart, Jr, D L; DeLiso, E M

The Alcoa/GE coal combustor is a two-stage, slagging cyclonic unit designed to direct fire an aluminum melting furnace at a rate of approximately 4.4 mm Btu/h (300 lb coal/h). The coal and an additive to trap sulfur compounds in the slag, is burned substoichiometrically in the first stage at 0.55 0 (55% of stoichiometric air) in the design case. Gaseous products leaving the first stage pass through a short analysis section and into the second stage, where sufficient air to complete combustion (total air = 10% excess) is injected. The hot (> 3000/sup 0/F) products of combustion pass directly into a melting furnace, which will be a 7-foot diameter ladle for the first combustor (Burner A), and to the stack. Shakedown operations continued during the fourth year of the contracted research and development program. Fifteen coal combustion tests were conducted, but all were terminated before steady-state conditions were attained because of mechanical and refractory problems. Lithium carbonate and calcium carbonate were used in the tests as fluxing/sulfur capture additives. Following relining with a brick more resistant to slag corrosion, shakedown operations will continue.

• Research Organization: Aluminum Co. of America, Alcoa Center, PA. Alcoa Labs.
• DOE Contract Number: AC01-78CS40037
• OSTI ID: 5116784
• Report Number(s): DOE/CS/40037-T13; ON: DE82019389
• Resource Relation: Other Information: Portions of document are illegible
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
36 MATERIALS SCIENCE
CYCLONE COMBUSTORS
CORROSION
FAILURE MODE ANALYSIS
MATERIALS
PERFORMANCE TESTING
REFRACTORIES
SLAGS
CORROSIVE EFFECTS
ADDITIVES
ALUMINIUM
CALCIUM CARBONATES
COAL
COMBUSTION
DESIGN
FAILURES
LITHIUM CARBONATES
MELTING
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
CALCIUM COMPOUNDS
CARBON COMPOUNDS
CARBONACEOUS MATERIALS
CARBONATES
CHEMICAL REACTIONS
COMBUSTORS
ELEMENTS
ENERGY SOURCES
FOSSIL FUELS
FUELS
LITHIUM COMPOUNDS
METALS
OXIDATION
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
SYSTEM FAILURE ANALYSIS
SYSTEMS ANALYSIS
TESTING
THERMOCHEMICAL PROCESSES
014000* - Coal
Lignite
& Peat- Combustion
360204 - Ceramics
Cermets
& Refractories- Physical Properties
360205 - Ceramics
Cermets
& Refractories- Corrosion & Erosion