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I'm wondering if it is possible to make a furnace capable of melting platinum? I melted a tiny bit of mixed pgm by taking the "nose" from an oxygen sensor (edt: and I filled it with mixed pgms) and heating it indirectly with the flame of my small oxygen/propane torch. After that, I started thinking that with the appropriate choice of refractory and burner tube if it wouldn't be possible to a make a tiny furnace capable of melting a few ounces of platinum or palladium at at time, the idea being that it would be better to have the metal, especially metal powders, indirectly heated to melting temperature rather than using the flame to transfer the heat, as some powder inevitably is being lost from being blown away. The temperatures needed are rather extreme, and the cycling of temperatures would be hard on the refractory, and the burner flame holder/tip would need to be alumina or zirconia likely but besides that is/has this ever done? I think it would be a cool thing to have, if it could be built for not too many dollars, and if it would have a practical life span. Other concerns might be whether the direct action of the flame would be too extreme on the crucible, it might be necessary to have an initial air/propane or air/hydrogen burner to give a more gentle heating. I wonder about this because I melted all the rest my PGMs in alumina crucbles with an oxy/acetlyene torch and sold them based on xrf, but I managed to crack every crucible I bought by the time I made all my buttons. I must have been doing something terribly wrong, besides the likely inadvisability if melting impure pgms Still it was quite an experience! Anyways, it's not something I can justify building for any practical reason right now, but if anyone has any thoughts I thought it might make a good discussion.

Also, if Lou is reading this, my thanks for talking with me on the about the PGMs a while back, I was itching to sell them and get some money for them, so I sold them melted on XRF analysis. It likely would have worked out better in most all respects to have gone the extra step to separate and refine them, but that's done with. Anyways, I've got a bunch of oxygen sensors to do, and I certainly intend to go the extra little step and get the Pt to a high purity with them, so I hope to be able to utilize your services in the future.

edit for clarification - I used the sensor nose as a crucible for pgms that I packed into it, it wasn't an attempt to recover the metals from the sensor itself.

skippy said: I'm wondering if it is possible to make a furnace capable of melting platinum? I melted a tiny bit of mixed pgm by taking the "nose" from an oxygen sensor and heating it indirectly with the flame of my small oxygen/propane torch. After that, I started thinking that with the appropriate choice of refractory and burner tube if it wouldn't be possible to a make a tiny furnace capable of melting a few ounces of platinum or palladium at at time, the idea being that it would be better to have the metal, especially metal powders, indirectly heated to melting temperature rather than using the flame to transfer the heat, as some powder inevitably is being lost from being blown away. The temperatures needed are rather extreme, and the cycling of temperatures would be hard on the refractory, and the burner flame holder/tip would need to be alumina or zirconia likely but besides that is/has this ever done? I think it would be a cool thing to have, if it could be built for not too many dollars, and if it would have a practical life span. Other concerns might be whether the direct action of the flame would be too extreme on the crucible, it might be necessary to have an initial air/propane or air/hydrogen burner to give a more gentle heating. I wonder about this because I melted all the rest my PGMs in alumina crucbles with an oxy/acetlyene torch and sold them based on xrf, but I managed to crack every crucible I bought by the time I made all my buttons. I must have been doing something terribly wrong, besides the likely inadvisability if melting impure pgms Still it was quite an experience! Anyways, it's not something I can justify building for any practical reason right now, but if anyone has any thoughts I thought it might make a good discussion.

Also, if Lou is reading this, my thanks for talking with me on the about the PGMs a while back, I was itching to sell them and get some money for them, so I sold them melted on XRF analysis. It likely would have worked out better in most all respects to have gone the extra step to separate and refine them, but that's done with. Anyways, I've got a bunch of oxygen sensors to do, and I certainly intend to go the extra little step and get the Pt to a high purity with them, so I hope to be able to utilize your services in the future.

I think oxygen sensors only have platinum in them, no palladium.

Jim