RE: PW24 Feb 2019 20:05
I used to work on a 15 megawatt submerged arc furnace smelting platinum concentrate. The holes would blind over with slag so they used an oxygen gas lance to reopen the hole. The oxygen gas reacts aggressively with the hot ore and steel pipe and will burn through anything, even diamond ! We once had a breach and all the contents of the furnace came out on the floor, what a mess, no one noticed until it was over !