The JN series of carbon-free deoxidizer is mainly used for the deoxidation of low carbon steel and ultra low carbon steel. It is mainly formed by mixing aluminum metal powder and lime powder under pressure. On the one hand, the utilization rate and deoxidation efficiency of aluminum are improved; on the other hand, through a reasonable ratio, the proportion of low melting point compounds in the deoxidation product is the highest, which is easier to eliminate.