Characteristics of Dry Ice Blasting - Antoni International

26 Pages·2012·0.49 MB·English

CChhaarraacctteerriissttiiccss ooff
DDrryy IIccee BBllaassttiinngg
BBllaasstt MMeeddiiaa
(cid:122)(cid:122)
EEqquuiippmmeenntt
(cid:122)(cid:122)
SScciieennttiiffiicc PPrriinncciipplleess
(cid:122)(cid:122)
BBllaasstt MMeeddiiaa –– DDrryy IIccee
Solid form of Carbon Dioxide
(cid:132)
Available in Pellets and Flakes
(cid:132)
-109°F
(cid:132)
Inert (non-combustible)
(cid:132)
RREECCYYCCLLEEDD - Man-made bi-product of
(cid:132)(cid:132)
hydrocarbon and ammonia production
0.03%/Vol in normal atmosphere
(cid:132)
EEqquuiippmmeenntt
SScciieennttiiffiicc PPrriinncciipplleess
DRY ICE BLAST
CLEANING
Impact Flushing
Action of CO2
Particles Uses kinetic
energy effectively
sublimates on
impact.
SScciieennttiiffiicc PPrriinncciipplleess
Thermal Effect
(cid:132)
Kinetic Effect
(cid:132)
Sublimation Effect
(cid:132)
Thermal Effect
Dry ice particles have a temperature of –109F.
When these particles impact the impurities on
the surface, the impurities are cooled down
tremendously, shrink and then loosen from the
surface. In most cases the surface temperature
will fall below most impurities freeze point. As
impurities freeze they lose their adhesion.
Kinetic Effect
When dry ice particles exit the nozzle, they have
kinetic energy. As in commercial blast cleaning
the impurities are dislodged from the surface.
Unlike sand, dry ice has a lower hardness
characteristic and therefore greater kinetic
energy can be used to break impurities from the
surface without damage occurring.
Sublimation Effect
When dry ice particles strike the surface, they
immediately phase into gas from solid. The effect
increases the gas volume approximately 700
times. The sudden increase in volume assists in
moving the brittle fragments of impurities away
from the surface.
TTyyppeess ooff AApppplliiccaattiioonnss
Orrggaanniicc//BBiioollooggiiccaall CCoonnttaammiinnaannttss
(cid:132)
MMaann--mmaaddee//IInndduussttrriiaall CCoonnttaammiinnaannttss
(cid:132)(cid:132)
SSuurrffaaccee PPrreeppaarraattiioonn && CCooaattiinnggss RReemmoovvaall
(cid:132)(cid:132)
TTyyppeess ooff AApppplliiccaattiioonnss
OOrrggaanniicc//BBiioollooggiiccaall CCoonnttaammiinnaannttss
Mold Moss
(cid:132) (cid:132)
Mildew Bacteria
(cid:132) (cid:132)
Dirt/Mud Decaying Matter
(cid:132) (cid:132)
Algae Fruits & Vegetables
(cid:132) (cid:132)
Bird Droppings Sugars/Syrups
(cid:132) (cid:132)
Soot Flours & Grains
(cid:132) (cid:132)