God continues to describe his punishment of the people of Israel in Jerusalem as if they were metals that he was melting and purifying in a furnace. (See: [[rc://en/ta/man/translate/figs-metaphor]])
The phrases with "anger" and "wrath" are used together to emphasize that he was extremely angry. AT: "Because of my great anger and wrath, I will gather you" or "I will be furiously angry with you, and I will gather you" (See: [[rc://en/ta/man/translate/figs-abstractnouns]])
This is the image of a person gathering the metals in the furnace and blowing the fire to make it hotter. Yahweh speaks of the greatness of his wrath as if it were a fire that he was blowing to make it hotter. AT: "I will gather you, and my wrath will be like a fire that I will blow on you" (See: [[rc://en/ta/man/translate/figs-metaphor]])
God speaks of punishing the people as if his wrath were a liquid that he would pour on them. AT: "have punished you in my anger" (See: [[rc://en/ta/man/translate/figs-metaphor]])