结晶器和铸坯间的渣膜直接影响铸坯的润滑和传热，由于无氟保护渣特性不同于传统含氟渣，其传热特性以及它在结晶器内的热行为是研发的关键。因此，对结晶器无氟保护渣渣膜的传热和矿物结构进行了研究。研究结果表明：添加适当的Li2O、TiO2和Fe2O3，可使渣具有较好的流动性和较低的熔化温度，使渣膜的硅灰石相区缩小，黄长石相区扩大，从而减低渣膜的传热系数。
The flux film between mold and billet directly affects the heat transfer and lubrication of the billet, because Ffree mold powder differs from the traditional powder, the characters and its heat behavior are the key to the development of Ffree mold powder. It can be concluded that adding proper content of Li2O, TiO2 and Fe2O3 to Ffree mold powder, makes the Ffree mold powder have a better fluidity and lower melting temperature, and also makes the area of gehlentie enlarge and the area of CS shrink, which helps to reduce the heat transfer coefficient of flux film.
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