Ir recycling step 4

The crucible of concentrated nastiness has removed most of the volatiles, which will prevent a huge flame ball from forming in this step. Here, we are simply heating off any of the volatile salts and burning solid organics down to ash. The iridium/ash may be good enough to carry on, however, the recycling will be much easier after heating to higher temperatures. The setup is shown below: a crucible with the iridium residues being fired by a Meker burner with the air mixer on low, gas on low. Lots of smoke (fairly toxic) is given off in this step. Although the picture is taken with the sash up, it was down for the duration of the burn-off, save for the picture.