DIY Heat Treatment Oven

Finally made a proper heat treatment oven capable of reaching 1000°C (1800°F) drawing "only" 1.7kW.
Components list: Isulating bricks J23 rated to 1260°C. (230x110x64mm).

Premixed refractory mortar. Kanthal A1 wire 20ga (10m). PID controller. K-Type Thermocoupple rated to 1250°C. Solid state relay with heatsink. 12V computer case fan with power supply. Random steel pieces from the steel scrapyard.

 The Kanthal wire I bought is meant to be used in vape pens and has a resistance (R) of 30Ω for my lenght and thickness. The power draw can be calculated knowing the home mains voltage (225V in my case). Power draw: P = V x I Where I is the current flow in ampere: I = V / R = 225 / 30 = 7.5 A P = 225 x 7.5 = 1687.5 W Control box designed in Fusion360 and printed with PETG. Inside dimension are 105x115x450 mm (4x4.5x17.5 inch).

 I made the oven this small so that it's easier to heat up and there is no need for more heating element, considering also that my home has a power draw cap of only 2kW.

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