Copper refining part 2
Last Friday I finally got around to melting down a bunch of old scrap copper that I'd had lying around for months. I've now got enough copper and tin to cast my bronze sword!
My technique has really come on since I built my bucket furnace. I borrowed a friend's leaf blower for the air induction and it's way better than Kat's old hairdryer.
I've discovered that it works much better with real charcoal than charcoal briquettes, which leave a lot of claggy residue in the furnace and stop it getting hot enough.
Here's a quick video showing the refining of the scrap copper into pretty little ingots. It takes about two hours to get hot enough to melt the copper at 1084 °C, but then it's so hot that it melts down the next batch in a couple of minutes.
The molten copper is indescribably beautiful and quite took my breath away. It's a pale shimmery metallic salmon colour with a strong orange glow. I think I'm a little bit in love with it. I watched a Youtube video of a guy pouring gold a while ago, he said that after you see your first pour the metal takes up a little piece of your heart forever. I think I know what he means.
At the end of the video are the wooden model sword that I carved, and a test aluminium version that I cast last year. Can't wait to cast the bronze one!
In ten days we're leaving the UK for new adventures in Spain...Read more
Archive2016December 2016 (2)November 2016 (2)October 2016 (2)September 2016 (3)August 2016 (4)July 2016 (5)June 2016 (4)May 2016 (4)April 2016 (5)March 2016 (4)February 2016 (4)January 2016 (5)2015December 2015 (4)November 2015 (4)October 2015 (5)September 2015 (4)August 2015 (4)July 2015 (4)June 2015 (4)May 2015 (5)April 2015 (4)March 2015 (4)February 2015 (4)January 2015 (4)
What's this about?
Hi I'm Mat and I'm addicted to new hobbies. I used to think this was a bad thing but now I'm embracing it.
Writing them all up in this blog encourages me to finish projects, and helps me keep track of which ones I've tried.
After last week's disaster, here's a short video showing how Ferrofluids are supposed to look! I gave up trying to make my own and bought some from eBay along with some extra-strong neodymium magnets...
Also in Making things...
One of my most ambitious projects is to make a bronze sword, which involves learning a whole bunch of new skills...