Re: Melting Down Copper

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Posted by Jesse Brennan on July 31, 19100 at 15:14:49:

In Reply to: Melting Down Copper posted by Tyler Schmitt on July 31, 19100 at 15:03:56:

In Reply to: Melting down copper posted by Tyler Schmitt

Copper is not generally a recommended metal to cast in an

unalloyed state. Not by me because I have no direct experience

doing this on a small scale. The reason given is that it picks

up too much oxygen and gets a lot of porosity. A friend who

tried it won't do it any more. Hydrogen is also a problem.

In industrial scrap recovery operations that I am familiar

with, high grade scrap with a high copper content is recovered

in fairly large revebatory furnaces but the product ends up as

alloy ingots. Low grade stuff can be recovered in a coke fired

copula. The results then go to a revebatory furnace for

alloying. Industrial shops can control a proper atmosphere.

At Santa Clara de Cobre in Mexico copper ware is made in an

old traditional way. Haven't been there yet.

My understanding is that they put the copper directly in a

coke or possible charcoal bed with a bellows pumped air blast. I

understand the bed is basically a hole in the ground with an

ingot sized depression in the bottom.

Molten copper ends up in the bottom. The bed is allowed to

cool and a solidified pan shaped ingot is recovered from the

bottom. The ingots are then drawn out into absolutely

beautiful vase and bowl shaped objects.by traditional hand

techniques. I have posted stuff on this before further down

this list.

Jesse

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Re: Melting down copper plus a little

by Jesse Brennan

To see what they are able to do in Mexico see:

http://www.mexconnect.com/MEX/jrose/jjrsantaclaradecobre.html

A little of the history of the project and at least one photo

that shows a "furnace".

A little more can be found in the books:

"Mexicolor" ISBN 0-8118-1893-4 In print $24.95

This often can be found in the Design sections of the monster

bookstores where you can see for free.

Also:

"Great Masters of Mexican Folk Art" ISBN 968- 7009-81-0

in print published in Mexico about $125 US

Both books are beautifully illustrated With the second one

having material on the top artist-craftspeople

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Re: Melting down copper plus a little more again

again by Jesse Brennan

SEE:

http://www.ecobre.com/index.html

All this work is hand forged from cast scrap metal ingots.

not casting at this stage but it started there

Jesse


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