@691175002:
I have used a similar brick to K23: IFB23. They have good parameters as well.
PID and SSR coming in the near optimistic future.
@CaptainNomihodai:
That's interesting as I've seen guys build whole crucibles out of welded steel
But I did listen to your advise and went with the in-brick grooves.
As for the mortar - I've already bought it, and the bricks do not seem *that* fragile, so I've went with it.
### UPDATE ###Inventor screenshot vs. Inventor 48h render:
Right now the mortar is setting, 4 (+1 divided into pieces) more bricks will be added on top.
The wire i have now:
### Main ###
Power = 2000 W
grid voltage = 230 V
### Wire ###
wire Ohm/m = 1.85 Ohm/m
wire dia = 1.00 mm
wire current = 8.70 A
wire resistance (24*C) = 26.45 Ohm
wire length = 14.30 m
wire Surface Load = 4.45 W/cm^2
### Coil ###
coil diameter = 15.00 mm
min. coil length = 0.91 m
max. recommended coil length = 1.82 m
With a coil length of 1m (dimensions of the base of the inside of the furnace are roughly 25 x 25 cm).
Having three levels of grooves I can add the same coil two times (and get overall 3-phase 6 kW furnace...
).
However, realistically I can add it only once because of my house power limit.
If I had more money for this project and higher current limit per phase in my household I'd go for 2mm Kanthal, one-phase 4.3kW furnace:
### Main ###
Power = 4300 W
grid voltage = 230 V
### Wire ###
wire Ohm/m = 0.46 Ohm/m
wire dia = 2.00 mm
wire current = 18.70 A
wire resistance (24*C) = 12.30 Ohm
wire length = 26.63 m
wire Surface Load = 2.57 W/cm^2
### Coil ###
coil diameter = 15.00 mm
min. coil length = 3.39 m
max. recommended coil length = 6.78 m
And obtain a nice SL of 2.57 W/cm^2.
It would need 2 more levels of grooves in the top bricks to fit 5m coil.
... but 2mm Kanthal is expensive and I have 16A current limit, so no
Will get back to you guys soon.