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

Patent · Thu Jan 01 00:00:00 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

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