Sometimes I go off track and the wierdest questions tickle my brain. Like this one: What kind of technology was available in biblical times for a furnace to be hot enough to kill those who threw Shadrach, Meshach, and Abednego into the fire never mind big enough to fit three people. I know how much fuel it takes to heat up my small damascus forge to welding temp using veg oil and I know how much coal it takes to keep a small forge fire going at welding temp for a reasonable length of time. I have also worked in a foundry with big electric furnaces and pots for smelting and even though they are extremely hot you can get quite close without dying.
We know this was not a once off arrangment coz it says:
19 Then was Nebuchadnezzar full of fury, and the form of his visage was changed against Shadrach, Meshach, and Abednego: therefore he spake, and commanded that they should heat the furnace one seven times more than it was wont to be heated.
I think sometimes we have this very naive and primitive view of how people lived in biblical times. I have sometimes used my forge to give children an impression of the heat mentioned in this passage and I am quite sure that my estimation is way off.
So how hot do you think it was and how and what do you think they used to get it that hot? Remembering that this was an existing furnace used IMHO fairly often.