Inclusion control method

The present invention discloses a steel cord and rod Al2O3 inclusion control method, wire rod chemical composition as percentages by weight: C? 0.68% ~ 0.89%, Si? 0.1% ~ 1.0%, Mn? 0.35% ~ 0.80%, P≤0.015%, S≤0.010%, N≤0.004%; total oxygen content ≤0.002%, aluminum content ≤0.0010%, the balance being Fe and other unavoidable impurities. Al2O3 inclusions control method comprising ferrosilicon and ferromanganese aluminum content ≤0.02% after using a converter furnace, an aluminum content was added recarburiser ≤0.05%; Al2O3 content refractories in the refining process large jars lining, the tank bottom and at the slag line ≤0.05%, lime, silica sand, sillimanite, wollastonite Al2O3 slag material content ≤0.05%; large tanks refining of molten steel was refined using dedicated; steel cord completed within 15 minutes before the end of the LF refining final deoxidization and fine-tuning components; molten steel was stirred with argon gas treatment, an argon gas flow rate of 150-350NL / min; continuous casting process intermediate covering flux of Al2O3 content ≤0.03%, Al2O3 content tundish spreads ≤0.04%. Steel cord of the present invention, the Al content is controlled ≤0.001%, that the rod is eliminated Al2O3 inclusions, broken wires in wire rod drawing process has been reduced.