Furane-Graphite Cement
(FG Cement)
General
FG Cement is a two component cement based on
Furane Resin. The hardened cement is black in colour
and its electrical and heat conductivity is between
that of metals and insulators. In respect of heat
resistance, FG Cement is considered to be much
superior to the similar cements. It is stable up to
175oC and brief exposure up to
200oC. The hardened
fully cured cement has superior chemical resistance
to alkalies,solvents and limited resistance to
oxidising acids and gases.
Uses
FG cemnt is an ideal choice for laying and
pointing of ceramic, Graphite and carbon tiles and
blocks to form chemically,thermally and mechanically
resistant linings for reaction vessels and
equipments in chemical industries. The hardened
cement exhibits good chemical resistance to acids,
dilute oxidising acids,solvents and alkalies.
Physical Properties
Working
Time
: 20 Minutes at 30oC
Compressive Strength : 600
Kg/cm2
at 30oC
Flexural
Strength
: 120 Kg/cm2
Bond
Strength
: 15 Kg/cm2
Water
Absorption
: less than 0.5%
The tests are conducted as per
Is:4456 (Part I) & the result confirms to
IS:4832 (Part II)
Chemical
Resistance
A chart can be availed on request
Pretreatment of the
Substrate Surface
The substrate surface and the metal should be
thoroughly cleaned to ward off rust and other foreign
particles either by sand blasting or conventional
methods of cleaning. The cleaned surface should be
applied with a protective monolithic membrane.
The selection of the protective membrane depends
upon the temperature and chemical condition. The
cement should not, under any conditions , be
directly applied on to the metal surface because of
the presence of the acid catalyst.
Mixing Ratio
One part of Furane Resin and one and half part of
Graphite powder.
Method
of Use
Furane Resin and Furane Graphite
powder should be mixed lump free until the cement
composition is completely homogeneous. (Please note
that the cement should have Butter-like consistency,
it should be neither be too loose nor to tight.)
The open pot life depends upon processing
temperature. The pot life at 30oc,
for a weight of 1 Kg of cement mix (400gm of Resin
and 600gms of powder) is about 25 to 30 minutes. The
pot life is less if the processing temperature is
high and vice versa. Because of the exothermic
nature of reaction, small quantities of resin and
powder should be mixed at a time. The total mix will
be about 400 gms of Resin to 600 gms of Powder.
Moisture, even in the form of water vapor is harmful
to cement, which has not yet hardened. Care should
be taken so that the work site remains dry and warm.
Procedure
for Laying the Tile
The mixed lump free cement should
be troweled to a thickness of 3 to 4 mm on to the
substrate. The cement is troweled on to the back of
the tile and fixed on to the substrate already
applied with the cement. This procedure should be
affected to lay the graphite tiles which will ensure
a better bonding.
Note that the mixed cement, when
looses its workability is to be discarded and not to
be used. The cement when it starts rolling back onto
the trowel, while applying on the tile or substrate,
is an indication that the cement has lost its
workability. This usually happens after 20 to 25
minutes at moderate room temperature. of 30oC.
After
Treatment of the Laid Cement
Furacor FG cement hardened at room temperature for
about 5 days usually exhibits high degree of
chemical resistance and strength. In order to
achieve optimum chemical resistance, particularly to
solvents, thermal after treatment is advisable.
Safety
Precautions during use
Experience has shown that it is
not harmful for FURACOR FG powder and the ready
mixed composition to come in contact with the skin.
It should be cleaned copiously with water. while
working with the cement, protective hand gloves and
goggles should be used else it may cause skin and
eye irritation. The fumes or gases evolved out of
the cement while working should be driven away by a
fan or by supply of air.
Storage
In our experience , Furacor FG
Powder and Resin can be stored without damage for
more than 18 months. Care should be taken that the
powder and resins should be tightly packed and
stored in a dry place. No moisture or air should
come in contact with the material.
Packing
The resin is packed in Jerry Cans
or Drums and the powder is packed in Polyethylene
bags.
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