The quantity

size and dispersion of inclusions in steel have great influence on the quality of steel product.It is key to smelting high-quality clean steel and improving product quality by controlling nonmetallic inclusion in steel.Based on the behavior of inclusions in steel

the mechanism and application characteristics of various inclusion removal technologies were reviewed.Among them

bubble method and filter method were used to adsorb

capture and promote inclusions in molten steel into slag phase through bubbles and filters.Electromagnetic purification method can increase the probability of inclusions collision and coagulation by means of centrifugal force of electromagnetic field

and its application is limited by electric power resources due to complex equipment.By the inclusion modification technology which is to transform high melting point inclusions into low melting point inclusions

the inclusion floating can be promoted.The inclusion modification is easy to operate

however it also lead to secondary pollution of molten steel.Oxide metallurgy technology is pointed out that the inclusions are refined to pin and restrain the growth of austenite grains at high temperature by changing the size

shape and distribution of inclusions

and to avoid the formation of coarse grains as well as refining the structure and improving the strength and toughness of steel.The technology of this method provides a new idea for inclusion control with potential application prospects.