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Good materials for galvanizing kettle support





September 2, 2011

Q. CAN YOU HELP TO FIGURE OUT GOOD MATERIALS FOR PROVIDING KETTLE SUPPORT?

Ilesh G Vyas
Gunatit Builders
supporting advertiser
Manjalpur, Vadodara, Gujarat

gunatit builders

First of two simultaneous responses -- May 11, 2012

A. Steel.

geoff_crowley
Geoff Crowley
Crithwood Ltd.
Westfield, Scotland, UK
crithwood logo


Second of two simultaneous responses -- May 12, 2012

A. Sir:

My "hands on" experience is limited, however, "in the old days" I recall that kettles are usually set upon leveled, reinforced concrete of perhaps two or three feet thick. Upon this concrete base it was common to put two layers of fire brick or insulated fire brick. Sometimes several inches of leveled dry river sand was used on top of the concrete. In more recent times a cast-able insulated material several inches thick is being used. Be sure that the top edge down and the bottom up (vertical) areas of the kettle are insulated to prevent early kettle failure at the zinc/air interface and the dross/zinc interfaces are protected from overheating. If you do not know what I am writing about then find someone that has experience. For flat-flame, side-fired furnace figure that 50% of the flame energy will pass through the heating zone on the sides of the kettle. This transmission of heat is limited to 10,000 BTU/square foot/hour. If you are using end-fired, high-velocity burners then 67% of the energy passes through the kettle walls. I have published a useful article on this subject in the journal METAL FINISHING.

Regards,

Dr. Thomas H. Cook
Galvanizing Consultant - Hot Springs, South Dakota, USA


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