'Refiner' in the Bible

Take away the dross from the silver, And there cometh forth a vessel for the refiner:

But who can abide the day of his coming? and who shall stand when he appeareth? for he is like a refiner's fire, and like fuller's soap:

and he will sit as a refiner and purifier of silver, and he will purify the sons of Levi, and refine them as gold and silver; and they shall offer unto Jehovah offerings in righteousness.