I have made a foundry very similar to the one depicted in this video.
Video removed due to advertising.
I often see people using hair/blow dryers as sources of air to bring the fire and coals to maximum heat, i am pretty sure hair/blow dryers cant be turned on for extended amounts of time or they will simply burn out. As a substitute would a 70L/min 145psi air compressor work just fine for a simple forge such as this on. This is the link to the air compressor i am looking to purchase