[Stoves] Tip from a Potter

[Charlie Sellers]

Great!  I couldn't find the original post about coating metal, but I am very interested in replacing metal grates with clay ones (Darfur and other locations), to reduce costs and increase lifetime.

Does anyone has data on clay grates - rolled clay with holes?  How thick?  I can start by drilling holes in clay tiles (baldosa?).

Crispin, do you need a Pyrex grate for testing - I have a very reasonable local borosilicate glass workshop here?  Bring to you at ETHOS?

Charlie



Craig Gallien <craiggallien at slingshot.co.nz> wrote: If you have trouble with the durability of the parts of your stove , 
particularly the grate, try coating the metal part in liquid clay.

I use casting slip ( a mixture of clay, water, and a defloculant) to coat 
the vertical grate of my sawdust gasifier and it has increased its life from 
a week to 2 months and counting. The grate is made from element wire from 
old electric heaters that is then woven into a mesh with a gap size of about 
1cm square.

I spray it onto the mesh allowing it to dry between coats to build up a 1 or 
2mm thickness, but dipping would work to.

Thanks for everyone elses tips and ideas
Craig





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