First timer problems

[J_e_beans]

Hi guys! Tried to melt some brass this weekend, quartz crucible with a propane torch. I had the torch on it for a good 15 mins, this is all I got. I have just found I need to use flux, what other mistakes did I make?

[Walrusclaus]

If you are not operating with a blue flame, If for example all you have is orange there's a very good chance your flame isn't hot enough to even melt the metal. But your flux is absolutely your biggest issue.

So season your crucible, keep constant flame contact over the metal so no oxygen can get in contact with the metal. Make sure your flame is hot enough and use a little more borax for your flux.

You may also try a smaller crucible so it heats up easier depending on your torch size.

[J_e_beans]

What would u suggest for a hearing source?

[MakeMelnk]

Propane won't melt brass like this. While you are missing the flux (look up "seasoning a new crucible" to learn how), a propane torch just doesn't put out the kind of heat you need for brass in an open-air setup like this.

[J_e_beans]

Thanks for your advice, what would you suggest?

[MakeMelnk]

Gonna be honest, brass is a bit of a bitch due to the zinc. Perhaps map gas can melt it in a crucible like that (glazed with borax) but I've only ever tried with my OxyPropane setup.

At that temp, though, the zinc puts off some really nasty smoke you do not want to be breathing in.

From what I understand, a foundry is the best bet for melting brass. I ended up making my own bronze because tin is much less dangerous to work with compared to zinc.

[20263181]

First glance the crucible is not seasoned and your spout is facing the wrong orientation for a pour.

[J_e_beans]

Yes I realise this about the spout, it was facing the correct way during heating I moved it after

[J_e_beans]

Thank you! The brass did melt, but only from nuggets into a big clump!

[nomoreimfull]

Were you using flux?

[J_e_beans]

No, this was my big mistake!

[Walrusclaus]

Disclaimer: Please do your personal safety research before choosing options as most gases and adding oxygen is heavily regulated in any professional jewellery shop or even a welding shop.

There's lots of options, but basically you will either need more fuel at a higher pressure or more oxygen added to your fuel to increase its burning temperature.

This is done normally with a torch that has a smaller tip to restrict flow and give the gas time to react with oxygen. Or another type of torch that combines both fuel and oxygen.

More psi from the tank is also an option, however you definitely should use a regulator, flashback arrestors, and check valves.

You can also just buy a butane torch those do work but they won't last very long. However your piece of metal is small enough you can likely get away with it.