Rebuilding my Italian 2KG furnace. Had a crucible break and it caused catastrophic failure. The original element and refractory was a one piece unit. Unable to locate an orig. Italian replacement. A new Hardin chamber unit fits well, works well with the thermocoupler and controls.
Relined the metal cylinder with 2600 degree ceramic wool. (1 inch thick) Everything just fit perfect.
Here's the problem. It's not holding the heat. Can't get it up to temp. It's just radiating out through the sides, Wrapped a second inch of wool around the outside, Burned all the paint off the chamber. It's black not red anymore.
Was following the directions from the company I got the replacement parts from. Called him up, It should work! I got it to 1500 degrees after two hours, and that was as far as it would go.
Any suggestions from here about how to keep the heat inside. My supplier says it's all done right, but of course it's not working. Castable refractory cement? I am now stumped
Suggestions.
I use this for pouring 1kg silver bars.
Relined the metal cylinder with 2600 degree ceramic wool. (1 inch thick) Everything just fit perfect.
Here's the problem. It's not holding the heat. Can't get it up to temp. It's just radiating out through the sides, Wrapped a second inch of wool around the outside, Burned all the paint off the chamber. It's black not red anymore.
Was following the directions from the company I got the replacement parts from. Called him up, It should work! I got it to 1500 degrees after two hours, and that was as far as it would go.
Any suggestions from here about how to keep the heat inside. My supplier says it's all done right, but of course it's not working. Castable refractory cement? I am now stumped
Suggestions.
I use this for pouring 1kg silver bars.