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R.P.R.® in HOT BLAST STOVE
The use of R.P.R.® process for reparing refractory lining in Hot Blast Stove started at the end of September 1997.
The technique consists in projecting at high temperature through a lnce, a reactive mixture onto the degraded refractory
surface. The hot synthesized repair material coats the old refractory to form a monolithic lining.
In order to ensure a strong and stable bond at the interface, the repair material must exhibit a good thermal and
chemical compatibility with the initial surface.
Generally, the repair material exhibits thermomechanical properties similar and sometimes better than those of the
initial refractory.
FIB-Services has developed a standard powder grade to repair the Hot Blast circulating ducts of the combustion chambers
of Cowpers.
The main characteristic is a good thermal shock resistance which allows to withstand the sudden temperature changes.
By bracing and restoring the refractory masonry, FIB-services brings an original solution to the refractory degradations
in these area of the Hot Blast.
The R.P.R.® process ensures an extended lifetime for the combustion chambers as well as the Hot Blast circulating ducts
by stopping the propagation of the damages.
The R.P.R.® process and the know-how developed by FIB-Services for the Cowper maintenance is at our best knowledge
the first successful and long-lasting repairing method
before RPR® repair
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during RPR® repair
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after RPR® repair
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