Study on Fluidity of BF Slag with High Alkali and TiO2 Content
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摘要: 针对高炉大量使用碱金属含量高、含TiO2的低价外矿导致炉渣流动性恶化的问题,研究碱金属和TiO2对高炉渣流动性的影响。结果表明,随着TiO2含量增加,炉渣黏度升高;碱金属含量增加,炉渣黏度降低;二元碱度对炉渣黏度和熔化性温度影响较大。含TiO2的低价外矿的使用比例不宜超过30%;当炉渣TiO2含量3.2%、碱金属含量0.86%、二元碱度1.05、MgO含量10.46%时,炉渣具有良好的流动性。Abstract: The fluidity of BF slag deteriorates as the usage proportion of the low-cost imported iron ore becomes larger,because of the higher alkali metal and TiO2 contents,therefore,it is necessary to determine the influence of alkali metal and TiO2 on BF slag fluidity.Detailed research results show that slag viscosity increases with the increase of TiO2 content,and decreases with the increase of alkali metal content.The binary basicity affects the viscosity and the melting temperature significantly.The proportion of imported iron ore containing TiO2 to toal input ore should not exceed 30%,and the composition of slag should be controlled as follows:the TiO2 content is 3.2%,the alkali metal content is 0.86%,the binary basicity is 1.05,the MgO content is 10.46%.After considering these conditions,the resulted slag fluidity can be improved.
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Key words:
- BF slag /
- viscosity /
- the melting temperature /
- TiO2 /
- alkali metal
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