Coal contains ash, and ash will react with most refractories to produce a slag or glass which will eat away the refractory. So yes coal, or even charcoal will work, but you will be constantly feeding in charcoal, coal and holding your breath when the ash and stink pour out.
If the water used to set the cement is not driven off it will crack or break the casting. Even though the cement may look and feel quite dry, there is 'water of hydration' , water that is chemically bound up in the cement. Heating up very gradually allows this water to escape slowly.
Nice video and ... the music ... what a tasteful add on!
Thanks for posting.
What kind of gas are you using?
Very good, how many kilos of bronze this size supports?
its brass
the form you use to pur the aluminium in ,is made out of ?? .
how much and where did you get the refractory cement
The refractory cement came from artisanfoundry.co.uk
thank you
Nice job ...i want build it
Very nice . Is the photo at the start from the iron bridge museum?
Sorry for the late reply - I didn't spot your question. yes, that's right - it is iron bridge!
What are the dimensions for your pot
Very useful, thanks
Can you use coal and just heat it up to melting temperature within an hour?
yes
we will find out
Coal contains ash, and ash will react with most refractories to produce a slag or glass which will eat away the refractory. So yes coal, or even charcoal will work, but you will be constantly feeding in charcoal, coal and holding your breath when the ash and stink pour out.
Where did you get your crucible I'm looking for one that size. Nice build by the way!
The crucible came from www.castreekilns.co.uk
OK thanks I'm in the US so hopefully I can find one here
It’s a ‘Salamander A4’. It looks like there is quite a few of them on the US ebay site.
+David Cambridge Thanks David, I will check them out!
why 1000 after one week? is it about refractory cement?
Hello - just following the instructions that came with the cement.
If the water used to set the cement is not driven off it will crack or break the casting. Even though the cement may look and feel quite dry, there is 'water of hydration' , water that is chemically bound up in the cement. Heating up very gradually allows this water to escape slowly.
Can i use plastic pot instead of steel?
No, you can't.
David Cambridge thanks
🔥😀
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