gold furnace

Hello Kow,

       Welcome to THunting.com.   Sorry, I don't have an plans for one laying around, but there might be some in a couple of old books.
       

BA

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http://www.thunting.com/smf/index.php/topic,19342.msg126870.html#msg126870

Hello Kow

Do you have electricity at the site where you are processing the gold ore?

Are you processing Crushed quartz Reef gold or Alluvial gold or ore with many base metals in it?

I can show you how to make a furnace out of scrap materials.

Hardluck

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http://www.thunting.com/smf/index.php/topic,19342.msg126989.html#msg126989

Hello Kow

There are hundreds of ways to makes a furnaces.

Here is one off most cheapest and primitive furnace way to smelt very small amounts of metal. Please note this will only last one cast.

Take a larger tin can drill and insert small metal pipe about 3 cm off the bottom. This will act as tywere which a bicycle pump or any type of air pump attached to other end of the tywere which will act like a bellows pushing air into the furnace. this will increase the temperature of the furnace and the charcoal in the bottom. You can sit a smaller can inside the tin Furnace which will act as a crucible with your metal to melt.

Here is a very rough example with aluminum the melting point is about half of that of gold. So to cope with the extra heat you have to line your makeshift can furnace and crucible with refractory cement. Make sure you cure the cement by slow heating. You can in an emergency use a brick for a mold to make an ingot.

Personally I think you would be better of using propane gas than charcoal I have another system if your interested.


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http://www.thunting.com/smf/index.php/topic,19342.msg127190.html#msg127190

Hello Xavier

Here is a furnace made out an old propane bottle cut in half.Top used for a lid. Same sort of set but having compressed air and propane pushed through the tyweres with crucible to sit inside.This one works perfect and fairly portable.

You can see the metal just about hitting melting point in the crucible.

Here is another larger set up again with a stand. Home made blower to pump air through the tywere into the furnace.

Trick is with the refractory is heat slowly to cure when first making the furnace.What kills furnaces is rapid changes of temperature. Always get air pockets and moisture out of the refractory mix as they can crack the refractory. Another tip the finer the refractory mix the better. A variable air control valve is great to help control temperate of the burning propane.

If you get the furnace too hot beyond melting point of metal in question you can vaporize the metal.

They all work on the same basic principles.

Hardluck.


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http://www.thunting.com/smf/index.php/topic,19342.msg127200.html#msg127200

Hello Xavier

That is correct but there is many ways of making furnaces. I have seen a 44 gal drum used and metal garbage bins in another set up. The reverse outlet on an old vacuum used as a blower.

Hardluck

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