I do not see literal fire burning dross off Israel.
Ezekiel 22:18-22
18 Son of man, the house of Israel is to me become dross: all they are brass, and tin, and iron, and lead, in the midst of the furnace; they are even the dross of silver.
19 Therefore thus saith the Lord GOD; Because ye are all [house of Israel] become dross, behold, therefore I will gather you into the midst of Jerusalem.
20 As they gather silver, and brass, and iron, and lead, and tin, into the midst of the furnace, to blow the fire upon it, to melt it; so will I gather you in mine anger and in my fury, and I will leave you there, and melt you.
21 Yea, I will gather you, and blow upon you in the fire of my wrath, and ye shall be melted in the midst thereof.
22 As silver is melted in the midst of the furnace, so shall ye be melted in the midst thereof; and ye shall know that I the LORD have poured out my fury upon you.
There is no literal fire here but God says He will gather the house of Israel as a metal smith gathers different metals into a furnace. God does not use literal fire. His "anger and fury" does the burning and melts the house of Israel and leaves them there. vs. 20. God does not burn dross off of the house of Israel. The house of Israel is the dross, they are melted and left there. Not purified and brought back into the fold, they remain where they are melted.
If the house of Israel is melted and left who is left?