'Furnace' in the Bible

“Son of man, the house of Israel has become dross (metallic waste) to Me. All of them are (useless) bronze, tin, iron, and lead in the furnace; they are the dross of silver.

As they gather silver and bronze and iron and lead and tin into the furnace to blow fire on it in order to melt it, so I will gather you in My anger and in My wrath, and I will put you there and melt you.

As silver is melted in the furnace, so will you be melted in the midst of it; and you will know [without any doubt] that I the Lord have poured out My wrath on you [O Israel].’”