Abstract��For tinplate�� as the rolling thickness is thin and the surface quality requirement is high�� the demand for the smelting and continuous casting processes of this product becomes more stringent. The surface defects of tinplate�� especially the hole defects�� severely restrict the current capacity and the performance improvement of tinplate products. The primary cause of the tinplate hole defect is the poor control of the liquid steel cleanliness�� which is one of the key technologies in the production process of tinplate. The inclusions in steel were examined and analyzed by the scanning electron microscopy�� bulk sample electrolysis and light microscope and so on. And it was found that the main compositions of the micro and large inclusions were Al-Ca-Mg complex oxide inclusions. Meanwhile�� the large inclusions containing Na and K were derived from the mold fluxes.To reduce the production of inclusions�� the Al�� Mg�� Ca and Ba compound deoxidation was applied to substituted the pure Al deoxidization and low viscosity mould powder.
2018, Vol. 36 
