alistair.young1 on sun 2 aug 98
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Monona Rosol wrote:
"Figure, shmigure. Monitor the exhaust instead. It is the only way to
know. There are too many variables here. And merely weighing the ware
to
see how much has reacted is to ignore all the other sources."
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Hello Clayart list
I have enjoyed the discussions on salt kiln emissions.
Has anyone mentioned the tests carried out by Peter Meanley (senior
lecturer School of Ceramics) and Dr. Bill Byers, (School of Applied
Science) at the University of Ulster?
They have been carrying out practical testing of salt and soda kiln
emissions from a variety of kilns and have found very little evidence of
Chlorine at all and only small amounts of Hydrogen Chloride.
There is a report in Ceramic Review 167 (Sept/Oct 1997) of tests carried
out at last years Salt and Soda conference at the Royal Forest of Dean
College, Gloucestershire, England. Using the Draegar apparatus which is
sensitive to 0.2 - 3 p.p.m. they found no evidence of chlorine in
samples taken from flue gases at various points through any firings.
Hydrogen Chloride (Hydrochloric acid) was found at 11/12 p.p.m. A wood
fired soda kiln provided 3 p.p.m. Hydrogen Chloride!
Special note was made of two points.
No chlorine has ever been detected in any of their tests.
Hydrogen Chloride levels in these tests were lower than previous tests.
This article and a previous one in Ceramic Review 157 make interesting
reading on this subject. I understand this is part of a continuing study
by potter and chemist..
Alistair Young
Gloucestershire England -- raining again.
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