Rate of coal devolatilization in iron and steelmaking processes

Conference · Tue Jan 01 00:00:00 EST 1991

OSTI ID:5348009

Sampaio, R S; Fruehan, R J; Ozturk, B ^[1]

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1. Carnegie Mellon Univ., Pittsburgh, PA (United States). Center for Iron and Steel Making Research

The devolatilization of coal particles under ironmaking and steelmaking conditions was studied. A new experimental technique was developed to measure the rates of devolatilization. A unique method was used to prepare coal particles based on thick coal bands rich in a given maceral group. Experiments with these single particles gave good reproducibility. The rates of devolatilization for all coal types from low to high rank coals were measured in the gaseous atmosphere and within the slag phase. Real time x-ray images were taken for high volatile, low volatile and anthracite coals devolatilizing in a molten smelting slag. The rate in terms of percentage devolatilization were relatively independent of coal type and a small function of furnace temperature at high heating rates and temperatures studied. The rates depended on particle size and heating rates. The results were consistent with internal transport controlled processes primarily heat transfer. Furthermore the rates were the same in the gas and slag phase which is consistent with heat transfer control.

• Research Organization: EG and G Idaho, Inc., Idaho Falls, ID (United States)
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: FC07-89ID12847
• OSTI ID: 5348009
• Report Number(s): EGG-M-91135; CONF-910431-2; ON: DE92011140
• Resource Relation: Conference: Ironmaking and steel making conference, Washington, DC (United States), 14-17 Apr 1991
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
01 COAL, LIGNITE, AND PEAT
COAL
DEVOLATILIZATION
IRON ORES
SMELTING
COAL RANK
HEAT TRANSFER
PARTICLE SIZE
SLAGS
STEELS
ALLOYS
CARBONACEOUS MATERIALS
ENERGY SOURCES
ENERGY TRANSFER
FOSSIL FUELS
FUELS
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS
ORES
SIZE
360101* - Metals & Alloys- Preparation & Fabrication
010600 - Coal
Lignite
& Peat- Properties & Composition