Fan in the Bible

Isaiah 30:24 The oxen likewise and the young asses that ear the ground shall eat clean provender, which hath been winnowed with the shovel and with the fan.
Jeremiah 15:7 And I will fan them with a fan in the gates of the land; I will bereave them of children, I will destroy my people, since they return not from their ways.
Jeremiah 51:2 And will send unto Babylon fanners, that shall fan her, and shall empty her land: for in the day of trouble they shall be against her round about.
Matthew 3:12 Whose fan is in his hand, and he will throughly purge his floor, and gather his wheat into the garner; but he will burn up the chaff with unquenchable fire.