Refractory lining system for high wear area of high temperature reaction vessel

Patent · Thu Jan 01 04:00:00 EST 1998

OSTI ID:871477

Hubble, David H ^[1]; Ulrich, Klaus H ^[2]

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1. Export, PA
2. Duisburg, DE

A refractory-lined high temperature reaction vessel comprises a refractory ring lining constructed of refractory brick, a cooler, and a heat transfer medium disposed between the refractory ring lining and the cooler. The refractory brick comprises magnesia (MgO) and graphite. The heat transfer medium contacts the refractory brick and a cooling surface of the cooler, and is composed of a material that accommodates relative movement between the refractory brick and the cooler. The brick is manufactured such that the graphite has an orientation providing a high thermal conductivity in the lengthwise direction through the brick that is higher than the thermal conductivity in directions perpendicular to the lengthwise direction. The graphite preferably is flake graphite, in the range of about 10 to 20 wt %, and has a size distribution selected to provide maximum brick density. The reaction vessel may be used for performing a reaction process including the steps of forming a layer of slag on a melt in the vessel, the slag having a softening point temperature range, and forming a protective frozen layer of slag on the interior-facing surface of the refractory lining in at least a portion of a zone where the surface contacts the layer of slag, the protective frozen layer being maintained at or about the softening point of the slag.

• Research Organization: American Iron and Steel Inst., Pittsburgh, PA (United States)
• DOE Contract Number: FC07-89ID12847
• Assignee: Steel Technology Corporation (Washington, DC)
• Patent Number(s): US 5741349
• OSTI ID: 871477
• Country of Publication: United States
• Language: English

Related Subjects

/75/266/
10
20
accommodates
brick
composed
comprises
conductivity
constructed
contacts
cooler
cooling
density
direction
directions
directions perpendicular
disposed
distribution
distribution selected
facing surface
flake
forming
frozen
frozen layer
graphite
heat
heat transfer
including
interior-facing
layer
lengthwise
lining
lining constructed
magnesia
maintained
manufactured
material
maximum
medium
medium disposed
melt
mgo
movement
orientation
performing
perpendicular
portion
preferably
process
process including
protective
provide
provide maximum
providing
range
reaction
reaction process
reaction vessel
refractory
refractory brick
refractory lining
refractory-lined
relative
relative movement
selected
size
size distribution
slag
softening
steps
surface
surface contact
surface contacts
temperature
temperature range
temperature reaction
thermal
thermal conductivity
transfer
transfer medium
vessel
vessel comprises
wear
wt
zone