RickRag
Active member
Hi Guys,
I have about 7 oz. troy of white metal dental scrap. It is likely base metal mixed with gold, platinum, palladium and other non precious metals. It also has alot of porcelain fused to it to resemble tooth color as well as underlying opaquers designed to keep the metal from showing through the translucent porcelains. I tried melting down a small amount with an oxy-acetylene torch using a large rosebud tip designed for casting and a little borax flux but the result was a semi-molten mass of goo. It wouldn't flow, pour or otherwise separate into slag and metal that could be cooled and separated. I had to physically pry it out of the crucible in its semi molten state. It didn't come out easily and some of the metal had not melted, as though it was insulated from the heat by the amount of glass/flux/silicates. The torch used is designed to melt non-preciuous casting alloys for just this purpose. Any suggestions on how I can isloate the metal from the non-metal trash?
I have about 7 oz. troy of white metal dental scrap. It is likely base metal mixed with gold, platinum, palladium and other non precious metals. It also has alot of porcelain fused to it to resemble tooth color as well as underlying opaquers designed to keep the metal from showing through the translucent porcelains. I tried melting down a small amount with an oxy-acetylene torch using a large rosebud tip designed for casting and a little borax flux but the result was a semi-molten mass of goo. It wouldn't flow, pour or otherwise separate into slag and metal that could be cooled and separated. I had to physically pry it out of the crucible in its semi molten state. It didn't come out easily and some of the metal had not melted, as though it was insulated from the heat by the amount of glass/flux/silicates. The torch used is designed to melt non-preciuous casting alloys for just this purpose. Any suggestions on how I can isloate the metal from the non-metal trash?