对近两年从国外发展起来的新型精炼合成渣 12 Ca O· 7Al2 O3的烧成工艺、物性和脱硫能力进行了试验研究。结果表明 ,该渣系原料来源广泛 ,成本较低 ;以 12 Ca O· 7Al2 O3为低熔点相 ,具有较低的熔化温度 ,在精炼温度下具有较好的流动性 ;由于具有很高的碱度和 Al2 O3含量 ,因而具有较强的脱硫能力和吸附铝脱氧产物的能力 ,并且在精炼过程中还可配加大量石灰 ,进一步提高其脱硫能力 ,尤其适用于铝脱氧钢 The sintering process, physical properties and desulfurization capacity of 12 Ca O · 7 Al 2 O 3, a new refined synthetic slag developed from abroad in recent two years, were studied. The results show that the raw materials of the slag system have a wide range of sources and low cost. The low melting point phase of 12 CaO · 7Al2 O3 has a lower melting temperature and a better flowability at the refining temperature. Due to the high base Degree and Al2 O3 content, and therefore has a strong desulfurization capacity and ability to adsorb the aluminum deoxidation products, and in the refining process can also be equipped with a large amount of lime, to further enhance its desulfurization capacity, especially for aluminum deoxidation steel