Yahweh or the king destroying their enemies is spoken of as if their enemies are wood and Yahweh or the king will throw them into a furnace. (See: [[rc://en/ta/man/translate/figs-metaphor]])
Both clauses mean basically the same thing. Yahweh completely destroying his enemies is spoken of as if his wrath is a fire that completely burns up his enemies. (See: [[rc://en/ta/man/translate/figs-parallelism]] and [[rc://en/ta/man/translate/figs-metaphor]])