Cast Iron Fire Grate
In China, you could find many types of
cast iron fire grates, such as round fire grate, square fire grate,
camping fire grate etc.
According to the application, the cast iron fire grates could be
divided into gas fire grate, coal fire grate and wood stove fire
The material of fire grate is usually
grey iron, or called as
gray iron. Normally, it is not necessary to produce the fire
grate by nodular iron (ductile
iron), since grey cast iron is cheaper. Some clients may
require to add some Cr (chrome), Ni and Mo alloys to improve its
anti-fire property. According to the experience of
Dandong Foundry in China, the Cr is
useful for the high temperature fire grate, but Ni and Mo are not
necessary, but it will depends on the different applications.
As for the casting process for fire grates, for small grates, we
suggest to use the green sand floor
molding process, which is the most cheap and suitable for
the fire grates, since this process can keep the liquid hot iron
into the sand molds for one night, which could keep the good
flatness for the fire grates.
For the large fire grates, which are very seldom, you could consider
to use the resin sand casting
For the large quantity fire grates, such as over 30 thousands of
pieces each year, you could try to use the
automatic molding line
because of its high production rate. However, not all grates could
be produced by automatic molding lines since the short time cooling
and drastic vibration cleaning may could the deformation to the fire
As a buyer for the cast iron fire grate, what are the main issues
for your purchasing process in China?
Firstly, of course, find a good iron foundry who has the experience
in producing fire grates and can offer a reasonable price.
Secondly, checking the material to the sample and batch products. In
order to reduce the material costs, some small foundries may use the
large quantity of scarp iron as the main material, therefore, their
grates could not meet the material requirements, mainly means the
tensile strength requirement. Unqualified material will cause the
fire grates very fragile.
Thirdly, check the dimensions, especially the flatness, and the
surface quality. Since most of cast iron fire grates are anti-rust
painted, therefore, the repairing by the cast iron repairing
adhesive or welding, should be allowable. However, if the clients
porcelain enamel coating treatment. Then, any types of
repairing will be forbidden since the repairing may affect the
failure of the porcelain treatment.