How to make simple diy backyard blast furnace/forge
Note: This project requires very close adult supervision.

Charcoal
Bricks
Sands
Old vacuum cleaner
Pipe to fit inside vacuum hose
Electrical tape
Safety glasses

1. Build up a base hearth and sides with the bricks- stack them closely together – support the outside by pushing sand against it.
2. Important: set up vacuum to blow not suck. Attach the pipe to your vacuum hose with electrical tape, then push the pipe into a gap in the bricks towards the base of the hearth.
3. Start a small fire inside hearth. Sprinkle on top of fire with charcoal and turn on vacuum on low setting, when fire is able to sustain the extra airflow.
4. Keep adding charcoal from the top – be sure to wear your safety glasses.
5. With parental supervision – add steel rods and sand and practice your blacksmithing – using safety equipment to remove and add steel to fire.