The main chemical composition of EAF primary liquid metal for steelmaking high nitrogen stainless steel 10Cr21Mn16NiN (/% ： 0.03 ~0.13C

0. 30 ~0. 60Si

15.0-17. 0Mn

≤0.045P

≤0.030S

21. 0 ~ 22. 0Cr

1.0~ 1. 8Ni

0. 40 ~0. 65N) is 2. 20% C

21. 32% Cr. The decarburizing of liquid is carried out by top-blowing and bottom side blowing oxygen-nitrogen

added manganese iron and nickel iron

added lime to desulfurize

and after reducing by silicon iron the deep deoxidation of liquid steel is carried out by adding aluminium and calcium silicon powder; after manganese alloying by using metal manganese the Mn content in steel is up to 16%; during AOD tapping with liquid amount 45. 2 ~ 46.0 t

the nitrogen content in steel is 0.49% ~0.54%

after adding 1. 34 ~ 1. 67 t manganese nitride the nitrogen content in steel is 0. 64% ~0. 65%

the yield of nitrogen is up to 42.1% ~ 50. 2%.