Fix smelter being unable to melt graphite

[out-of-phaze]

Description of changes

Increases the high smelting temperature to 4000C (4273.15K), enough to melt graphite (melting point of 4074K).

Why and what will this PR improve

Fixes #4161. I understand that before it was set way too high, but like, it does need to be hot enough to melt graphite...

Authorship

Me.

[MistakeNot4892]

Per Discord I'm not super sure about this one. Scav had issues where they put stuff into the smelter and ended up with like, white-hot vaporized metal in the atmosphere. Smelting graphite into plastic is pretty absurd as-is, if there was a chemical process we could use to replace it I think that would probably be better - maybe a plastic precursor synthesised from powdered graphite, similar to the one you find in the botany mushrooms?

I guess the other alternative would be checking that none of the common ore/mineral materials vaporize at 4kK, or just removing that aspect of the smeltery entirely.

[out-of-phaze]

Per Discord I'm not super sure about this one. Scav had issues where they put stuff into the smelter and ended up with like, white-hot vaporized metal in the atmosphere. Smelting graphite into plastic is pretty absurd as-is, if there was a chemical process we could use to replace it I think that would probably be better - maybe a plastic precursor synthesised from powdered graphite, similar to the one you find in the botany mushrooms?

I guess the other alternative would be checking that none of the common ore/mineral materials vaporize at 4kK, or just removing that aspect of the smeltery entirely.

you need to smelt graphite to alloy it with iron and make steel, it's not the compressor, which is what turns graphite into plastic. i'd be fine with removing it personally, or limiting it to just water vapor so that you get punished for just shoving ice in there