RE:RE:5000 degrees capable vs 1200 unachieved Perfectly normal during commissioning to run multiple tests. They probably took 5 heavy oil burners outta service, fired off the 4 plasma and found it a little shy on required heat. Add another plasma gun or fire up another dirty burner and your back in business. Easy peasy. Even better , throw in a 4mw plasma burner.
and yes , they are referred to as burners in industry.
gas burners, oil burners , and now plasma burners. Like the dinosaurs, gas and oil had their time. The future is plasma in my opinion