System for coal blowing in iron oxide reducing kilns

Patent · Tue Mar 29 04:00:00 EST 1983

OSTI ID:6405848

Baker, A C; Bracanin, B F; Clements, R J; Goodell, T W; Hockin, H W; Keran, V P

A method and means for improved control of the process for directly reducing materials containing iron oxides in a rotary kiln using a solid carbonaceous reducing agent, such as coal, introduced from the charge feed and discharge ends of the kiln, as the source of both fuel and reductant, and oxygen-containing gas introduced along the kiln length is disclosed wherein the portion of the reducing agent fed at the discharge end is blown as a stream in a prescribed manner into the discharge end of the kiln. In particular, the important features of the stream are described including its longitudinal distribution and axial spread over the charge bed, as well as its contact region with the kiln walls and the quandrants of the kiln barrel into which it is directed, whereby the bed and gas phase temperatures may be controlled and heat transfer to the bed enhanced.

• Assignee: Direct Reduction Corp
• Patent Number(s): US 4378243
• OSTI ID: 6405848
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010600* -- Coal
Lignite
& Peat-- Properties & Composition
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTIONS
COAL
CONTROL
ENERGY SOURCES
ENERGY TRANSFER
FOSSIL FUELS
FUELS
HEAT TRANSFER
IRON COMPOUNDS
IRON OXIDES
KILNS
MATERIALS
OXIDES
OXYGEN COMPOUNDS
REDUCING AGENTS
REDUCTION
TEMPERATURE CONTROL
TRANSITION ELEMENT COMPOUNDS