I forgot to mention, I am a little concerned about getting coke to
operate a cupola. But after watching Steve Chastain's vidio and
seeing how fast a cupola is I'm going to build one. I will worry
about coke after I get one built. It's out there somewhere, and I
will find it.
In firstname.lastname@example.org, mz1773@h... wrote:
> Today I received Steve Chastain's Cupola book and vidio. I have
> watched the vidio and read some of the book. I will be up late
> tonight as I want to watch the vidio again and finish reading the
> book once.
I used to melt aluminum in a cupola. The problem with trapped gas (porosity)
was solved by melting pistons, their size and weight would pull them to the
bottom before they started to melt. If the charge stayed on top and dripped
into the bottom, yes it would be full of gas. As for contaminates, the small
opening for tapping skims the metal as it is poured from the furnace. The
gating system also cleans the metal before it reaches the casting cavity.
Steve in Spokane
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