(57) Provided is a manufacturing method of a recycled plate for a sliding nozzle that
widens a range of a used plate as a target for recycling.
The manufacturing method of the recycled plate performs, on a used plate, recycling
processing including impregnating a matrix of the plate with liquid containing at
least one of tar and pitch, cutting a peripheral edge of a through-hole of the plate
after the impregnating, and filling a recess having an opening width and a depth of
equal to or smaller than 1 mm, which is present on a surface of the plate after having
been impregnated with the liquid and heated, with a thermal expandable refractory
material of which volume is increased by at least one of generation reaction and change
in a crystal structure with heating when the plate attached to the sliding nozzle
is used.
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