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METHOD:PUBLISH
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ORGANIZER;CN=ESTAD 2023:mailto:info@metec-estad.com
LOCATION:Room 16a
SUMMARY:Copper stave cooling system with upgraded wear protection
DESCRIPTION:Significant campaign life extensions of the Blast Furnace (BF) of more than 15 years are the customers demand all over the world. The required target life can be reached by the well established classical copper cooling stave, covering the BF-shell from the hearth up to parts of the BF-stack.

Some BF-areas, like bosh and belly (cohesive zone) as well as the transition zone (lower and middle stack) are critical wear attack mechanism zones. In these critical BF-areas, the copper cooling staves, covered with conventional wear protection linings have shown that they are not sufficient enough to reach the customers demand.

During the long-lasting BF-campaign, especially in the cohesive zone, like bosh, belly and lower stack; natural accretion layers may form in front of the copper cooling staves by freezing a mixture of slag and pig iron. Unfortunately, all of the formed accretion layers are not stable enough to protect the copper stave surface in case of rough wear mechanisms, like descending burden and upstreaming gasjets during the BF-campaign.

Copper stave wear protection linings, such as metal- or cast iron inserts, refractory mass / mixes- top coatings, shotcastings/shotcretings, solgel refractory mass; as well as all kind of graphite-, doped carbon-, high alumina- or silicon carbide refractory bricks are not abrasion resistant enough to protect the copper cooling stave surface during the long-lasting BF-campaign, to reach the required life time target.

This presentation is focusing on:

•	The proven copper cooling stave concept, design and realisation; especially for the bosh and the stack transition zone.

•	The developed, well experienced and installed copper cooling stave wear protection; using very high abrasion resistant silicon-infiltrated and reaction-bonded silicon carbide (RBSiC)-Inserts.

CLASS:PUBLIC
DTSTART:20230615T145000
DTEND:20230615T151000
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