Multilevel free-type gas atomization spraying tray with gas self-circulation function

The invention relates to a multilevel free-type gas atomization spraying tray with the gas self-circulation function. The multilevel free-type gas atomization spraying tray comprises an auxiliary nozzle, a main nozzle and a recycling gas flow guide part. The auxiliary nozzle is connected with the upper end of the recycling gas flow guide part, and the lower end of the recycling gas flow guide partis connected with the main nozzle. A melt channel of the auxiliary nozzle, a melt channel of the recycling gas flow guide part and a melt channel of the main nozzle communicate with one another up and down. A recycling flow guide channel is formed between the recycling gas flow guide part and the main nozzle. The recycling flow guide channel communicates with the melt channel of the main nozzle,and when the main nozzle is installed on a partition plate between a smelting chamber and an atomizing chamber, the recycling flow guide channel can communicate with the atomizing chamber. Compared with the prior art, auxiliar