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Influence of basicity and FeO content on viscosity of blast furnace type slags containing FeO

机译:碱度和FeO含量对含FeO的高炉渣的粘度的影响

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The viscosities of CaO-SiO2-Al2O3-MgO-FeO slags were measured under conditions of C/S=1.15-1.6, 10-13mass% Al2O3, 5-10mass% MgO and 0-20mass% FeO. Slag viscosity decreased with increasing FeO content at a fixed basicity (CaO/SiO2) of slag. Slag viscosity at low FeO (<75 mass% FeO) exhibited a minimum value by increasing MgO content in slag. Viscosity decreased with increasing slag basicity up to 1.3 while it increased as slag basicity increased from 1.3 to 1.5. It was proposed that the driving force for the decrease of slag viscosity would be an increase in depolymerization of silicate network at C/Sless than or equal to1.3, while the viscous behavior at C/S>1.3 would be increased with increasing the chemical potential of primary solid phase e.g. dicalcium silicate. A thermodynamic approach for the activity of primary solid phase in molten slags resulted in a reasonable relationship between viscosity and slag components. Therefore, it was confirmed that slag viscosity in basic slags (C/S>1.3) could be estimated by the chemical potential of dicalcium silicate.
机译:在C / S = 1.15-1.6、10-13质量%的Al 2 O 3,5-10质量%的MgO和0-20质量%的FeO的条件下测量CaO-SiO 2 -Al 2 O 3 -MgO-FeO渣的粘度。在一定的碱度(CaO / SiO2)下,炉渣粘度随FeO含量的增加而降低。通过提高炉渣中的MgO含量,低FeO(<75质量%FeO)下的炉渣粘度呈现最小值。粘度随着炉渣碱度增加到1.3而降低,而随着炉渣碱度从1.3增加到1.5而增加。提出降低炉渣粘度的驱动力是在C / S小于或等于1.3时硅酸盐网络解聚的增加,而在C / S> 1.3时的粘性随化学反应的增加而增加。初级固相的电势,例如硅酸二钙。用热力学方法分析熔渣中初生固相的活性导致了粘度和熔渣成分之间的合理关系。因此,证实了可以通过硅酸二钙的化学势来估计碱性炉渣中的炉渣粘度(C / S> 1.3)。

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