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首页> 美国卫生研究院文献>Materials >Effects of B2O3 on Melting Characteristics and Temperature-Dependent Viscosity of High-Basicity CaO–SiO2–FeOx–MgO Slag
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Effects of B2O3 on Melting Characteristics and Temperature-Dependent Viscosity of High-Basicity CaO–SiO2–FeOx–MgO Slag

机译：B2O3对高碱度CaO–SiO2–FeOx–MgO渣的熔融特性和随温度变化的粘度的影响

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摘要

In order to reduce the amount of fluorite during the steelmaking process for environmental protection, it is essential to investigate the fluorine-free slag system. Thus, high-basicity CaO–SiO –FeO –MgO slag with B O content from 0% to 15% was designed, and its melting characteristics and viscosity were investigated. The influence of B O content on the phase diagram of the slag system was calculated using FactSage 7.3, and the break temperature was determined from the curves of temperature-dependent viscosity. The results show that, with the increase in B O content, the melting characteristics of the CaO–SiO –FeO –MgO/B O slag system, including liquidus temperature, flow temperature, softening temperature, and hemispheric temperature, all decreased; the main phase of the slag system transformed from Ca SiO into borosilicate, and finally into borate; the viscous flow activation energy reduced from 690 kJ to 130 kJ; the break temperature reduced from 1590 °C to 1160 °C. Furthermore, the melting characteristics and the break temperature of the slag system with 5% and 8% B O content were found to be the closest to the values of fluorine-containing steel slag.
机译：为了减少用于环保的炼钢过程中的萤石含量，研究无氟炉渣系统至关重要。因此，设计了BO含量为0％至15％的高碱度CaO-SiO-FeO-MgO炉渣，并对其熔融特性和粘度进行了研究。使用FactSage 7.3计算B O含量对矿渣系统相图的影响，并根据随温度变化的粘度曲线确定断裂温度。结果表明，随着B O含量的增加，CaO-SiO -FeO-MgO / B O渣体系的熔融特性，包括液相线温度，流动温度，软化温度和半球温度均降低；炉渣系统的主要相从Ca SiO转变为硼硅酸盐，最后转变为硼酸盐。粘性流动活化能从690 kJ降低到130 kJ；断裂温度从1590°C降至1160°C。另外，发现BO含量为5％和8％的炉渣体系的熔融特性和断裂温度最接近含氟钢渣的值。

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