We use dry ice pellets for cleaning High Voltage ( 500KV) insulators and
switch gear as well as generator windings. Talk to Seattle City Light they
use the same process for their distribution equipment cleaning and they
have a Co2 pelletizer. Co2 shavings do not work any where as well as the
pellets.The nice thing about the pellets is it strikes with enough mass and
mechanically dislodges the particulate and the vaporizes into a gas lifting
the contaminate away from the surface.

Pete




"ATP*" wrote in message
...

"Jerry Martes" wrote in message
news:fpf1e.18041$wL6.15138@trnddc03...
Bush Pete

How do you get the dry ice to size for blasting? I really like the
concept, but dont visualize how the process works.

Jerry

You either buy it that way, or buy specialized equipment that shaves
blocks. It's an expensive process and it requires special tools to do it
on a practical basis. I had a good application for it but soon decide that
the media cost, etc. would eat us alive.



"Bushy Pete" wrote in message
...
Normal sandblasting will leave a messed up aluminium surface full of
tiny
dents that will catch food the next time they are used. I know from
years
ago in the army when we cleaned a bunch of hotplates with the workshop
sandblaster. They went back looking clean, but I pitty the next poor
buggers
that had to clean them.

They use crushed walnut shell blasting or similar for cleaning inside
some
aircraft engines, these would run just as happily through a normal $20
air
sander and be easy to do at home if you wished.

Top of the range is using dry ice as the grit for blasting out ovens and
cookwear on site and there is no residue other than the old carbon that
has
already been blown away. Totally food safe, and all you need is a
compressor, a sandblaster attachment and a container of dry ice
crystals.

Hope this helps,
Peter


"Dan" wrote in message
...
I have a couple of pizza shops (Way OT!) but metalworking DOES come
into
play!

We use aluminum pans for baking the pizzas in the oven and since we use
butter on the edges of the pan-pizza pans they start accumulating
carbon
buildup after a year or so of use. Is there a way for my to remove
this
carbon short of sandblasting? It must be a food safe and leave the
pans
structurally intact, figure about 125-150 pans overall that I need to
clean,
then re-season.

Any ideas? Anyone in the Kirkland or Kent WA area with a sandblaster
that
wants to trade sandblasting time for pizzas?

-Dan