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首页> 外文期刊>ISIJ international >Effects of CaO/SiO_2 on Viscous Behaviors and Structure of CaO-SiO_2-11.00wt%MgO-11.00wt%Al_2O_3-43.00wt%TiO_2 Slag Systems
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Effects of CaO/SiO_2 on Viscous Behaviors and Structure of CaO-SiO_2-11.00wt%MgO-11.00wt%Al_2O_3-43.00wt%TiO_2 Slag Systems

机译：CaO / SiO_2对CaO-SiO_2-11.00wt％MgO-11.00wt％Al_2O_3-43.00wt％TiO_2炉渣体系的粘性行为和结构的影响

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The viscous behaviors of CaO-SiO_2-11.00wt%MgO-11.00wt%Al_2O_3-43.00wt%TiO_2 slag systems were investigated by the rotating cylinder method in this paper, and the effects of CaO/SiO_2 on the viscosity, break point temperature and activation energy for viscous flow of slag were analyzed. Meanwhile, the slag structural characterizations were studied by Fourier transformation infrared (FTIR) spectroscopy and Raman spectroscopy, and the phase compositions of pre-melted slags were detected by X-ray diffraction (XRD) analyses. The results show that, when the CaO/SiO_2 increases from 0.20 to 0.80, the viscosity, break point temperature and activation energy for viscous flow of slag decrease. FTIR and Raman spectroscopy results indicate that the complex viscous units in slag are gradually depolymerized with the increase of CaO/SiO_2, which improve the fluidity of slag. The depolymerization mechanism of silicate networks can be expressed by O_(Si)~1 + O_(Si)~3↔O_(Si)~2. The complex O-Ti-O deformation units are depolymerized into the simple structural units (TiO_4~4 monomers, Ti_2O_6~4 chains and Ti-0 stretching vibrations in 6-coordinated Ti~(4+)) and the [AlO_4]- tetrahedrons are simplified to the [AlO_6- octahedrons. In addition, the relative amounts of low melting point complicated pyroxene in the pre-melted slag increase, improving the meltability of slag and decreasing the break point temperature.
机译：本文采用旋转圆筒法研究了CaO-SiO_2-11.00wt％MgO-11.00wt％Al_2O_3-43.00wt％TiO_2炉渣体系的黏性行为，以及CaO / SiO_2对黏度，断裂温度和温度的影响。分析了粘渣流的活化能。同时，利用傅立叶变换红外光谱（FTIR）和拉曼光谱研究了炉渣的结构特征，并通过X射线衍射（XRD）分析检测了预熔渣的相组成。结果表明，当CaO / SiO_2从0.20增加到0.80时，粘滞性的粘度，断裂点温度和活化能降低。 FTIR和拉曼光谱结果表明，随着CaO / SiO_2的增加，炉渣中的粘性单元逐渐解聚，提高了炉渣的流动性。硅酸盐网络的解聚机理可以用O_（Si）〜1 + O_（Si）〜3↔O_（Si）〜2表示。复杂的O-Ti-O变形单元解聚为简单的结构单元（TiO_4〜4单体，Ti_2O_6〜4链和6配位的Ti〜（4+）中的Ti-0拉伸振动）和[AlO_4]-四面体简化为[AlO_6-八面体。另外，预熔炉渣中低熔点复合辉石的相对含量增加，提高了炉渣的熔融性并降低了断裂点温度。

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