Cast Basalt Interior Coating: Non-toxic And Eco-friendly 3-layer Non-stick Coating

Cast Basalt

Cast Basalt Liners at BMW are manufactured by sintering the basalt
raw granules in the tunnel furnace at 1280oC. Advantage of this process
is that BMW can produce the desired composition of basalt liners to
produce best quality. Granules are shaped in metal moulds.
After crystallization the cast basalt liners are forwarded into cooling
zone of furnace, where they are passing through until they cool down
(8-10) hours. Then the cast basalt has high abrasion resistance,
corrosion resistance.
The cast basalt products are mainly used in the pneumatic pipe line to
convey sand, coal ash, fine slag slurry, tar sand slurry, lime, acid,
alkaline material. Cast Basalt Liners are also applied at the inclined
plane for cokes/coal chutes, ore cello, and lime and cement chutes,
cyclones, and separators where high abrasion resistance for lining
material is required.Below table is for the tests conducted at 45 Deg angle Jet erosion
machine exposed for 15 minutes. Results exhibit excellent abrasion
resistance of cast basalt.
























Test Material


Weight before test(g)


Weight after test(g)


Weight loss(g)




BMW BASALT 450


43.0823


43.0769


0.0054




18% Cr STEEL


65.8816


65.8653


0.0163




STAINLESS STEEL(AISI-310)


67.8721


67.7855


0.0855




CARBON STEEL(IS-2063)


61.5328


61.2629




0.27






Corrosion Resistance


It has good resistance against Acid, Alkaline and Acid medium. It is
advantageous in application areas where abrasion and Corrosion
resistance is needed. Low cost and High quality of cast basalt products
enable us to apply as anti-acid bricks below temp. 300oC. Anyhow Cast
Basalt is not resistant to hydrofluoric acid.


We can guarantee the corrosion resistance quality of BMW Cast Basalt
450 even when compared to FRP material used in anti-acid tank and pipe
line.

Sliding Characteristics


BMW Cast Basalt 450 lined pipes and chutes have been checked for the
coefficient of friction that is 0.021 it is smaller 20~30% than common
steel plate. Therefore the power consumed in transferring the ash or
other medium is much lower than the steel. In case of coal slide
channels wet coal do not need vibrator or manual pocking in order to
slide the coal on the surface.


Not only good sliding of Basalt 450 eases transfer of coal, but due to
reduced resistance improved discharging capacity. The more  Basalt 450
is used, the better sliding is the surface.

Cast Basalt in Ash Pipeline and Bends


One of the major factor influencing bend wear rate is the conveying
velocity of the ash, density and the ash particle size. Lean-phase
system normally maintain velocity between 20-27 m/s. The metal bends
and pipes required to be replaced very frequently. To check the wear
bends are lined with Cast Basalt liners. In lower ID bends, wear
resistant Ni-Hard castings are also used. In this section we will
demonstrate our Cast Basalt lined bends.

Cast Basalt in Ash Sump Lining


The slurry from the bottom ash system as well as from fly ash system is
discharged by pipeline to the slurry pump through the ash sump. The
slurry sump is divided into compartments with common trough and plug
gate to feed respective sump. Due to the high density and velocity of
ash slurry in sump, erosion of surface is high. The power plants are
increasingly using Cast Basalt Liners as their preferred lining.