jsurgeson Posted September 12, 2010 Share Posted September 12, 2010 Thought I would share my second attempt at a gas forge. My first attempt was a crude pile of fire brick and even cruder atmospheric burners. Although the forge worked well it was not efficient I did not have much control over the temperature or the way the burners burnt. With my second one I constructed it from an old steel water heater tank. The lining is firebrick (thats why so thick) covered with 1300 degC castable cement. I also decided to scrap the atmospheric burners and try blown burners. The position of the burner tip is fully adjustable and although not shown, each burner forced air inlet will have a fully adjustable gate to control air flow. The blown air will come from a squirrel cage air blower. If you are wondering what the green arm is on top the forge, it is a swing arm to hold my digital temperature indicator. I have built up a 7 segment display which will display the temp in degC from a type K thermocouple. The thermocouple position is between the two burners. Quote Link to comment Share on other sites More sharing options...
kcrucible Posted September 12, 2010 Share Posted September 12, 2010 Very nice. What's the inner dimensions of that forge? What's the max temp on the thermocouple? Some purchased ones I've seen seem to max out at 2400F. Is there a reason for the REALLY LONG bar between the valve and the tip? Just erring on the side of caution for adjustability? Once you figure out the proper placement, you might consider replacing it with a shorter one so that it doesn't take up as much floor space. Quote Link to comment Share on other sites More sharing options...
jsurgeson Posted September 12, 2010 Author Share Posted September 12, 2010 0.6 cubic feet / 17.1 liter (22cm x 45cm) Correct, I think 0 - 1300 degC is its operational band. I am a knife maker so need accuracy for hardening. yes the length was for adjust-ability, probably more so that I am fairly new to blacksmithing and all things forge related. I had quite a few problems tuning my atmospheric burners, and in fact never got the one to burn quite right or the same as the other, so thought i should leave myself some slack. You are right though it does take up a lot of floor space and in hindsight should have had it at an angle to reduce. Quote Link to comment Share on other sites More sharing options...
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