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REFRACTORY
COATING
APPLICATION INSTRUCTIONS COVERAGE:
One gallon of coating will cover 30 to 50 square feet depending upon
the porosity of the refractory surface.
COATING PROPERTIES: The coating is stable indefinitely in
the powder form. In the liquid form the coating may gel and
additional water should be added to obtain the proper
consistency. During application the coating should be stirred
occasionally to prevent setting.
HANDLING: Normal precautions during surface preparation and
mixing of the coating should include the use of a dust mask to
minimize inhalation of refractory materials. During
application this is not a problem as the material is in liquid
form. The material is nonflammable, noncaustic and nonreactive
in both powder and liquid form.
SURFACE PREPARATION: Surface preparation is not required on
new refractory. Older refractory surfaces should be cleaned by
wire brush and vacuumed after cleaning to remove all dust
particles. Penetration of the coating into the pore structure
of the refractory is required to obtain proper bonding.
This cannot occur if the pores are filled with dust.
APPLICATION OF REFRACTORY COATING: The coating should be
mixed and applied so that penetration of the coating into the pore
structure of the refractory surface is obtained. If proper
penetration does not occur; the coating may peel off. The coating can be applied by brush or spray gun. A coarse brush such as a wallpaper brush is recommended. Murphy spray pistols have been successfully used. The
proper consistency for applying the coating is dependent upon the
porosity of the refractory.
EQUIPMENT START UP: The coating should be allowed to air
dry prior to equipment start up. Start=up of new
equipment should be at the rate specified by the manufacturer to
insure that the refractory is not stressed. For older
equipment the normal start-up procedure should be followed. It
is not necessary to immediately start up the equipment after
applying the coating as it is unaffected by exposure to ambient
conditions.
In metal applications, the coating should be glazed prior to
metal contact if this is possible. If not, heat the coating to
as high a temperature as possible before introducing the molten
metal; the glazing process will be completed by the heat from the
molten metal.
RECOATING: The refractory should be recoated when the
"glazed" or "glassy" look is gone.
Frequency of coating depends upon the type of operation
involved. For example: boilers should be recoated once a
year while ladles may require coating once a month. |
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RX
Chemical Company, Inc.
PO Box 188 Phone Fax Email |
