'Smelter' in the Bible

for they [are] your people and your inheritance whom you brought from Egypt from the middle of the smelter of iron.

A crucible for silver, and a smelter for gold,and the Lord is the tester of hearts.

A crucible for silver, and a smelter for gold,and a man for the words of his praise.

To an idol?—something that a smelter casts,and a metalworker plates with goldand makes silver welds for it?

So the craftsman encourages the smelter,And he who smooths metal with the hammer encourages him who beats the anvil,Saying of the soldering, “It is good”;And he fastens it with nails,So that it will not totter.

just like a smelter gathers all the silver, bronze, lead, and tin to the center of a furnace and injects fire in order to melt it, I'm going to gather you in my anger and rage, make you settle down and then I'm going to melt you down.

He will sit as a smelter and purifier of silver, and He will purify the sons of Levi and refine them like gold and silver, so that they may present to the Lord offerings in righteousness.