How tf do I melt iridium and alloy it with other platinum group elements?

I plan on using oxy-hydrogen as a heat source, but I'm open to suggestion. Also have oxy-propane available. Acetylene is maybe possible but very very hard to get.

>I know it's dumb
>I can't use graphite or any crucible containing carbon of any sort

Can I use a tungsten crucible? Will it simply form a glob and adhere to the tungsten?

Any advice would be appreciated.