'Furnace' in the Bible

"Son of man, the house of Israel has become slag to me. All of them are like bronze, tin, iron, and lead in the furnace; they are the worthless slag of silver.

As silver, bronze, iron, lead, and tin are gathered in a furnace so that the fire can melt them, so I will gather you in my anger and in my rage. I will deposit you there and melt you.

As silver is melted in a furnace, so you will be melted in it, and you will know that I, the Lord, have poured out my anger on you.'"