[Stoves] At what temperature are the bad gases from zinc created, vs harmless zinc oxide?

Fri Feb 1 14:59:15 CST 2013

Dear Paul

Zinc boils at 907 C.

Evaporated zinc is much more harmful.

Cadmium (which is used in plating and the paints/inks on plastic bags) boils
at 767 and is a problem as well.

Regards
Crispin

-----Original Message-----
From: Stoves [mailto:stoves-bounces at lists.bioenergylists.org] On Behalf Of
Paul Anderson
Sent: Friday, February 01, 2013 2:39 PM
To: Discussion of biomass cooking stoves
Subject: [Stoves] At what temperature are the bad gases from zinc created,
vs harmless zinc oxide?

Stovers,

Galvanized metal in stoves gets mentioned occasionally.  Do we have a clear
answer about what is the temperature at which the zinc makes poisonous gases
(such as when welding) versus making zinc oxide (the white stuff that you
can by in a tube to put on your nose to prevent 
sunburn)?   Is it bad if the temperature is at 400 C to 700 C?   Or does 
it need to get much higher?

Paul

--
Paul S. Anderson, PhD  aka "Dr TLUD"
Email:  psanders at ilstu.edu   Skype: paultlud  Phone: +1-309-452-7072
Website:  www.drtlud.com

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