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应用红外真空炉研究了CaO颗粒度对含石灰熔剂熔融过程的影响。采用了两种平均粒径分别为10!m和75!m的CaO颗粒和四种含石灰熔剂:炼铁渣CaO-SiO2、CaO-FeO、CaO-SiO2-Al2O3及炼钢渣CaO-SiO2-FeO。在现有实验条件下得出了CaO-SiO2、CaO-FeO两种熔剂的反应产物与加热温度及保温时间的关系。对于熔剂的熔融,减小石灰粒径可以缩短保温时间,但是不能降低加热温度。CaO-SiO2熔融过程中,观测到在CaO颗粒表面形成了一层2CaO·SiO2,阻碍其熔融。减小CaO粒径同时能有效的促进其在CaO-SiO2-Al2O3炼铁渣及CaO-SiO2-FeO炼钢渣中的分解。
The effect of CaO particle size on the melting process of lime-containing flux was studied by using infrared vacuum furnace. Two CaO particles with an average particle size of 10 μm and 75 μm, respectively, and four lime-containing fluxes were used: ironmaking slag CaO-SiO2, CaO-FeO, CaO-SiO2-Al2O3 and steelmaking slag CaO-SiO2- FeO. Under the existing experimental conditions, the relationship between the reaction products of CaO-SiO2, CaO-FeO and heating temperature and holding time was obtained. For the flux melting, reducing the lime particle size can shorten the holding time, but can not reduce the heating temperature. In the CaO-SiO2 melting process, it was observed that a layer of 2CaO · SiO2 was formed on the surface of CaO particles, hindering their melting. Reducing the particle size of CaO can effectively promote the decomposition of CaO-SiO2-Al2O3 slag and CaO-SiO2-FeO steelmaking slag.