by bobaloo » Mon 11 Apr 2005, 12:02:24
Did you know that the Washington Monument is capped with a small pyramid made of aluminum? At the time, it was the most precious metal in existence, far more valuable than gold.
Bauxite, or aluminum ore, is basically kaolin, which is what porcelain is made from. In order to separate the aluminum it must be heated to around 4000 degrees in giant electric arc furnaces, normally powered by hydroelectric dams.
The good news is that once created, aluminum only has to be heated to a fairly low temperature to recycle it. I have several thousand pounds of aluminum in my shop, was thinking about selling it, but perhaps it will go up substantially in price one of these days...