在冲天炉熔炼过程中可能产生的高温和低一氧化碳分压条件下,稀土氧化渣能被石墨还原成稀土。据此,把稀土氧化渣加入炉料,借助于还原出来的稀土改善铁水石墨形貌,提高铁水质量。试验表明,冲天炉批科中加入5%左右的稀土氧化法,能使铸铁件的抗拉强度提高大约半个多牌号。 In the cupola melting process may produce high temperature and low carbon monoxide partial pressure conditions, the rare earth oxide slag can be reduced to rare earth graphite. Accordingly, the rare earth oxide slag added to the charge, with the help of reduced rare earth to improve the morphology of molten iron and improve the quality of hot metal. Tests showed that cupola batch approved by adding about 5% of the rare earth oxidation, can make the tensile strength of castings increased by about half the number of brands.