FeO-SiO₂-CaO-MgO系高镁炉渣粘度的测定

来源期刊：中南大学学报(自然科学版)1997年第4期

论文作者：曾德文 李作刚 刘海霞 张传福

文章页码：343 - 346

关键词：炉渣； 粘度； 氧化镁m_SO2,ω_Fe3O4

Key words：slag； viscosity； MgO

摘    要：测定了合成的不同成份的FeO－CaO－MgO系炉渣的粘度，得知：在炉渣中，当m_Fe/m_SO2为1.2～1.5，ω_MgO为6%～9%，ω_Fe3O4为3%～4%，ω_CaO为0～9%，温度范围为1250～1450℃时，炉渣粘度随ω_Fe/ω_SiO2和ω_CaO的升高而降低，随着ω_MgO的升高而增大；在1350℃以上时，上述变化关系则不明显．对于闪速炼镍所采用的FeO－SiO₂－CaO－MgO系炉渣，在一般的冶炼操作温度(1300～1350℃)下，当渣中ω_MgO高达6%～8%时，仍可获得流动性能良好的渣；当ω_MgO在9%以上时，则渣的粘度迅速上升以致不适合于冶炼．同时，在炉渣总量不变的情况下，在一定的范围内通过减少SiO₂的加入量和补加CaO含量可使炉渣粘度得到改善．

Abstract: Viscosities of various slags of FeO-SiO₂-CaO-MgO system are determinated in this paper. The results show that slag viscosity is decreased with the increase of m_Fe/m_SiO2 ratio and CaO content and with the decrease of MgO content under the range of slag contents: m_Fe/m_SiO2 1. 2～1. 5, ω_MgO6%～9%,ω_Fe3O4 3%～ 4%, ω_CaO 0～9%,temperature range of 1250～1450℃, of which the relations are not distinct above 1350 ℃. When the MgO content exceeds 9%,　the slag viscosity is increased abrupty to 0. 9～1. 3 Pa· s at ordinarily smelting temperature of 1300℃, which means the MgO content should not exceed 9% in practical operation in order to obtain a good mobility of slag. Meanwhile,low-viscosity slag can be obtained by adding CaO and lowering SiO₂ content without increasing the total weight of slag,