Non-Chemical heating the mold

[Anonymous]

I have a 5 fl. oz capacity graphite mold that I will be using to cast my recovered gold. I will be using a ceramic melting dish to melt the stuff, but what could happen if I pour the melted gold into the graphite mold WITHOUT heating the graphite mold?

Also, should I apply a something to the graphite mold to help the metal fall out easier?

 

[Barren Realms 007]

Put your melting dish on top of your mold when you are heating it and that will preheat your mold for you.

You can adjust your flame to a sooty flame and run it over the mold as a release agent or you can spray something like
WD40 on the mold for it.

 

[4metals]

If you have an acetylene torch you can carbonize the mold by burning the torch without oxygen forming a sooty flame. Holding the mold over this flame will coat the inside of the mold with carbon which is effective.

I have also used motor oil in the mold but I like the soot better. There is also a spray graphite made specifically for this purpose.

Whatever you put on the mold, preheating it is a good idea. Not glowing hot but very warm.

 

[Harold_V]

Whatever you put on the mold, preheating it is a good idea. Not glowing hot but very warm.

Absolutely! Insure that the mold has been heated at least to the boiling point of water. What you don't want happening is a molten puddle of gold creating a steam explosion, which is entirely possible in a mold that has not been heated.

Harold

 

[Harold_V]

I have a 5 fl. oz capacity graphite mold that I will be using to cast my recovered gold.

Be advised that a large mold will not pour a small ingot. If you try, the gold will ball up, not filling the mold.

I will be using a ceramic melting dish to melt the stuff,

Hopefully not a porcelain dish---like the Coors stuff. It's really wonderful quality, but very sensitive to thermal shock. Make sure your choice is intended to be used for melting metals.

Harold

 

[lazersteve]

There is a video on my website of me pouring gold into a graphite mold.

http://goldrecovery.us

Steve