Ron Roy on sun 7 jul 02
Hi Leland,
It's the 2 micron silica that is the problem so the sawdust filter is not
going to do the job - and HEPA filters clog up too fast for clay studios.
Take the advice about the central vac exiting the air out side and do the
dusty stuff out side - up wind. Lots of free fine silica in all most of
even the body clays we use - and usually even more in the bodies.
If you have a hot air system - or cooling - that will keep the little
buggers suspended indefinitely
RR
>IMHO, I think that it's about microns..like sawdust is big, free silica
>tiny, tiny, tiny. Tinier than average air filter size, or furnace filters
>etc. So tiny that when you CAN see it, and you usually can't when it's
>airborn, it looks like very, very thin smoke. Bizzare isn't that bentonite,
>(something I'd never heard of till I got into potting,) seems to be mostly
>used in only three edeavors, (that I know of): well drilling, ceramics,
>and to float anthrax. I figure the CIA is still looking into certain
>bentonite sources and suppliers. Only heard this on the news since
>9/1/1,) It's just that the particles are so tiny, that they are naturaly
>air-borne, and lodge deep in the lungs, and can't be coughed out, or up,
>and your stuck with it. Goes right thrugh most average filters I think.
>We need to check the micron size filtering capacity of the filter. The
>more efficient, the more $$. I still don't have adequate air quality in my
>studio. Scary. I mop a lot. Slop around lots of water. "Wet clay don't
>fly" I'm about to install another fan at a upper level window. In summer
>all I can do is open lots of windows with as many powerful exaust fans as I
>can round up. It's tough in winter. Very inadequate. Will look into
>woodworking type filter systems. Would be great if it would work because
>of expense of specilized aparatus. (Maybe an affordable blower/exaust
>system from the woodworking industry, and adapt a specialized filter from
>the ceramics industry?) BTW, what the heck is a "heppa" any way? Be that
>as it may, I guess we all need to guard our bentonite stashes. (lol?) I
>wouldn't be suprised to hear static back from someone thinking I'm giving
>away secrets. But the bad guys all have known this for decades. And
>seriously, It's made me treat my minerals and other dry ingredients with
>new respect. I think it's too often underestamated just how invisable and
>insidious free silica is. Peace
>
>Leland G. Hall, Before The Wheel Enterprises La Pine, Oregon
Ron Roy
RR#4
15084 Little Lake Road
Brighton, Ontario
Canada
K0K 1H0
Phone: 613-475-9544
Fax: 613-475-3513
Leland G. Hall on sun 7 jul 02
IMHO, I think that it's about microns..like sawdust is big, free silica
tiny, tiny, tiny. Tinier than average air filter size, or furnace filters
etc. So tiny that when you CAN see it, and you usually can't when it's
airborn, it looks like very, very thin smoke. Bizzare isn't that bentonite,
(something I'd never heard of till I got into potting,) seems to be mostly
used in only three edeavors, (that I know of): well drilling, ceramics,
and to float anthrax. I figure the CIA is still looking into certain
bentonite sources and suppliers. Only heard this on the news since
9/1/1,) It's just that the particles are so tiny, that they are naturaly
air-borne, and lodge deep in the lungs, and can't be coughed out, or up,
and your stuck with it. Goes right thrugh most average filters I think.
We need to check the micron size filtering capacity of the filter. The
more efficient, the more $$. I still don't have adequate air quality in my
studio. Scary. I mop a lot. Slop around lots of water. "Wet clay don't
fly" I'm about to install another fan at a upper level window. In summer
all I can do is open lots of windows with as many powerful exaust fans as I
can round up. It's tough in winter. Very inadequate. Will look into
woodworking type filter systems. Would be great if it would work because
of expense of specilized aparatus. (Maybe an affordable blower/exaust
system from the woodworking industry, and adapt a specialized filter from
the ceramics industry?) BTW, what the heck is a "heppa" any way? Be that
as it may, I guess we all need to guard our bentonite stashes. (lol?) I
wouldn't be suprised to hear static back from someone thinking I'm giving
away secrets. But the bad guys all have known this for decades. And
seriously, It's made me treat my minerals and other dry ingredients with
new respect. I think it's too often underestamated just how invisable and
insidious free silica is. Peace
Leland G. Hall, Before The Wheel Enterprises La Pine, Oregon
CWilyums@AOL.COM on sun 7 jul 02
Hi, I will put the plans of a modified air filter, two of which I have built
for my studio. I do both woodworking and pottery, so, you can imagine the
problem with dust I have. I can not take credit for the plans, as I
downloaded them from the net. I made one major modification, to increase
efficiency. The unit moves 720 cubic feet of air each minute. The unit uses a
HEPA filter (approx. $15) and a standard filter (to prolong the life of the
HEPA filter). The inline duct blower now costs approx. $80. I used
wafer-board and furring strips. My fast computer is ailing at the moment and
it may be a few days before I can put the plans on this site. Also, I do not
accept any responsibility if you choose to use the plans nor do I make any
claims of efficiency or safety; ie., Use At Your Own Risk.
C Williams in sunny Mississippi where the temp. and humidity are racing
one another to see which can reach/exceed 100 first.
Edouard Bastarache on mon 8 jul 02
Hello all,
" It's the 2 micron silica that is the problem so the sawdust filter is not
going to do the job
RR"
Quartz particles in the occupational setting range widely in size, but those
less than 1 micron are believed to be the most pathogenic. Since large
particles impact and sediment in the nares and the major airways, only
relatively small particles enter the acini. The size of silica particles
retained in the human lung is remarkably constant, with median diameters
ranging from 0.5 to 0.7 micron.
Later,
Edouard Bastarache
Irreductible Quebecois
Indomitable Quebeker
Sorel-Tracy
Quebec
edouardb@sorel-tracy.qc.ca
http://sorel-tracy.qc.ca/~edouardb/
http://perso.wanadoo.fr/smart2000/index.htm
| |
|
