Nice work you're doing there.
I see that you're using coal to heat your work... Probably an excellent choice, but I thought you might also be interested in these:
- Here is a link to converting an 1.8 kw Induction Cooker into an Induction Heater to use for heating ferric materials for forging, annealing and tempering.
- Here's a link to a 1000w induction heater (a kit, I guess).
- Here's a ink to a Simple Induction Heater
...I think the 1.8 kw conversion is the best bang for the buck.
Best,
-AC