Melting Silver - 32.15 Toz (1 Kg) 999 Bullion Bar

Описание: http://www.goldnscrap.com ** Melting Silver, Here's a short demonstration of meltdown and casting of a 1 Kilogram (32.15 Troy Ounces) Silver Bullion Bar.

Please note, the Silver was melted inside a graphite crucible (keeps Oxygen out) using an electric furnace. The actual pour of the metal is done all the while a propane flame is blazing into the mold cavity. Again, to prevent Oxygen absorption by the Silver (otherwise it will "spit" upon solidification).

Also note, as this is a safety issue as well as a technical demand, that the mold was pre-heated prior to taking this video by placing the mold on top of the furnace lid.
Molten metals being poured into a cold mold can literally "explode" out of the cavity all over you and the surrounding work place, posing a great fire and injury risk.

The mold was also seasoned prior to taking this video by coating it with a layer of soot from the propane flame.

This particular mold was made by me, unfortunately, it seems that i chose the wrong kind of graphite to work with (too porous), hence, the not so perfect surface finish (as you can see, the surface is slightly dimpled).

But all in all, still nice result. :-)

Here in this video, you can watch the a first Silver Refining steps:
   • How to Refine Silver - Tutorial, First stage