How can I make copper plate? I tried tomelt it in a furnace as in the original game, bit it doesn 't work in your mod.

Are you using Angel's mods? Angel's disables direct smelting of copper ore.

You can either directly smelt crushed stiritite. Or copper ore needs to be processed using Angel's smelting: Blast furnace, induction furnace, and casting machine.

It's a bit confusing to deal with all these mods. I didn't install Angel's mods, but some of the mods I picked up installed it as their dependencies.