The first-principles molecular dynamics method was used to simulate the formation process of alumina inclusions by the anode gas mass transfer to the aluminum liquid.The results show that in electrolytic aluminum

CO

2

is dissociated into CO and O

and aluminum is oxidized.The relative barrier change of the reaction process is the initial structure（0 Ha）→transition stateⅠ（0.019 Ha）→intermediate state（0.030 Ha）→transition stateⅡ（-0.042 Ha）→end of reaction（-0.056 Ha）.The reaction process between CO

2

and electrolytic aluminum solution is:CO

2

→CO

2（ad）

→CO

ad

+[O]→CO↑+[O]

3[O]+2Al→Al

2

O

3

.The total reaction is:3CO

2

+2Al→Al

2

O

3

+3CO↑.The aluminum oxide bond formed by the combination of the dissociated product oxygen and aluminum is very stable.Pure aluminum was prepared by using electrolytic aluminum as raw material.The microstructure of the solidified sample was observed by scanning electron microscopy.For high-temperature electrolytic aluminum liquid

the anode gas is a very strong oxidant

which can react with high-temperature aluminum liquid to form alumina inclusions.The oxidation inclusions in the electrolytic aluminum solution have a metallurgical genetic influence on the alloy structure.The oxidation inclusions are accumulated within the samples

and the surrounding pores are relatively developed

indicating that the gas passes through the oxidized inclusion nucleation and grows up.