Best cheap crucible - The Home Machinist!

Post by steamin10 » Wed Jan 20, 4:14 am

For more information, please visit Graphite Crucible for Sale.

Glass can be worked in a furnace, just like the glass blowers. It will soften and glow and is fun to play with.

It will shatter if it is not above about 600 degrees and pushed in the fire. That is about the tempering temperature for glass things blown and made by hand. (down to 450). Things just made have to be tempered to remove the stress. Glass shards finely broken are commonly used on brass to keep down the casting of fumes from the zinc burning off. It is hooked out as a sticky mass just before pouring, or making additions as a prelude to pouring.

I have destroyed dramatically, three clay crucibles, of about a gallon size. One I tried to grip the edge with tongs and raise it from the furnace, WRONG! Only part full it flexed and tore right down the side, spilling into the furnace. Had to pull the base block and the congealing Aluminum out of the bottom. The next day reset the base block on sand& furnace clay and dried it up. Second simply dropped on the floor, cold, it shattered like a clay flower pot. Third I was in a hurry to fire, and did not give time to remove the moisture from long idle time. It popped and crackled and shed the outer skin of itself, in the too hot furnace.

Always use picking tongs to lift the crucible out, and set it in a pouring shank. Make sure your shank has a cross rod, or holding hooks on the pouring side to keep it in the loop, of the shank.. Always wear a head cover and safty glasses at the minimum, in case you get some steam pops. Never leave a skull in the vessel, pig out, as the expansion upon heating can damage the bottom and sides. A vessel full of cold metal is a complete loss, ask me how I know..

I once poured a mold set out the night before, and had a sizable pop when I poured the first cup of aluminum in. I ruined the timing of the pour, so we shook it out to remake the mold in a hurry and try to repour.

We killed a mouse that was trying to build a nest in the flask only overnight. Yechh!

Big Dave, former Millwright, Electrician, Environmental conditioning, and back yard Fixxit guy. Now retired, persuing boats, trains, and broken relics.
We have enough youth, how about a fountain of Smart. My computer beat me at chess, but not kickboxing
It is not getting caught in the rain, its learning to dance in it. People saying good morning, should have to prove it.

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It is safe, efficient and economical. Whether you are a novice or an experienced craftsman. This crucible can meet your needs.

6# crucible perfectly adapted to CANALHOUT Propane Melting Furnace.It can also be used in other Fuel Furnaces,Kilns Furnaces, Biological pellet furnaces, Natural gas Furnaces, Coke Ovens, Coal Stoves, etc.

The crucible wall is very thick and can be directly heated by the CANALHOUT 304 stainless steel burner.

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