Induction furnace

https://www.youtube.com/watch?v=pVYMLnXW9uo

https://www.youtube.com/watch?v=txw6YTetpK0 induction furnace by Zerolabs.

https://www.youtube.com/watch?v=JtcLuPsnkXs induction furnace 3kwh

http://www.mindchallenger.com/inductionheater/, https://www.youtube.com/watch?v=fRyksa-7Bcc

Grant Thompson
https://www.youtube.com/watch?v=d5pGN6pqkyY electrical oven transform. 7mil views

https://www.youtube.com/watch?v=VTzKIs19eZE electric arc furnace same up. How to hack flashlight batteries and a fire brick, into a desktop arc reaction chamber. ...For hobby metal melting, and for science!

Some quick links to a few of the materials I used:

[✓] Lantern battery: http://amzn.to/2cgnKxN [✓] Forstner Bit: http://amzn.to/2c1Ja3V [✓] 3/8 Drill bit: http://amzn.to/2cgl6rL

links
Metal casting

http://www.lowtechmagazine.com/what-is-the-embodied-energy-of-materials.html