以实际生产高炉渣为原料,以铁尾矿为调质剂,采用测定熔渣黏度的方法确定调质高炉渣均质化过程,反映了铁尾矿的熔化、溶解和扩散的均匀化过程.并通过渣样中SiO2质量分数测定以及调质渣中矿相组成等方法验证了通过黏度测定调质高炉渣均质化的可行性.结果表明,同一酸度系数Mk下,调质高炉渣黏度随恒温时间的延长呈先下降后上升,最后趋于平稳的变化趋势;调质高炉渣均质化时间随铁尾矿添加量的增加而延长;当铁尾矿加入量大于15.88%时,调质高炉渣均质化时间显著延长;随着恒温时间进一步延长,试样上、中、下部SiO2质量分数趋于一致,而试样矿相组成与充分均质的调质矿渣一致,这说明通过黏度测定炉渣均质化的方法是可行的.中试试验证实,随着酸度系数的增加,纤维丝的直径增加,化学稳定性增强,纤维质量符合国家生产标准.
Homogenization kinetics of adjusted blast furnace slag was investigated with the method of testing viscosity on the basis of blast furnace slag sampled from a steel work as the main material and iron tailings as the adjusting re-agent. The study reflected the homogenization process of melting,dissolution and diffusion of iron tailings. SiO2 content and mineralogical composition in different parts of the remelting samples were determined to verify the feasibility of the method of testing viscosity to determine the homogenization of molten BF slag. The results showed that the viscosity of the adjusted molten BF slag was firstly decreased,then increased and finally became stable with the homogenization time in the same acidity coefficient. The homogenization time of the adjusted molten BF slag increased with the increas-ing of addition quantity of iron tailings. The homogenization time increased significantly when the addition ratio of iron tailings was more than 15.88%. SiO2 contents in the top,medium and bottom parts of the slag sample were similar with the increasing of homogenization time under constant temperature. The mineralogical composition of slag sample was consistent with that of the complete homogeneous slag,which improved that determining the homogenization kinetics of adjusted BF slag through the method of testing viscosity was feasible. Pilot test confirmed that with the increase of the acidity coefficient,the fiber wire diameter increased and the chemical stability enhanced which conformed to the nation-al production standards.
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