Al2O3含量对烧结初始液流动行为的影响

在铁矿粉烧结过程中,初始液相流动行为是烧结矿固结效果的重要影响因素。采用微型烧结法,探讨了Al2O3含量对初始液相流动行为的影响,并通过对初始液相微观结构的解析,揭示了Al2O3含量对初始液相气孔分布和结构的影响规律。实验结果表明,初始液相的流动性指数随着Al2O3含量提高而降低。水淬试样的XRD实验结果结果证实,Al2O3含量的增加提高了复合铁酸钙的稳定性,降低了初始液相的流动能力。此外,初始液相流动性亦会对气孔性质产生影响。高Al2O3初始液相中气孔结构不规则程度提高,且小于50μm气孔数目也随之增多。

Influence of Al2O3 content on the fluidity behavior ofprimary melts in sintering process

In iron-ore sintering process,primary melts fluidity behavior is an important factor for sinter consolidation.Experiments to study the influence of Al2 O3 content on the fluidity of primary melts is carried out.With the analysis of microstructure,the property of pore in primary melts is investigated. Results show that the fluidity index of primary melts decreases with the increase of Al2 O3 content.XRD results of water quenched sample ascertain that the increase of Al2 O3 content can stabilize SFCA,leading to the decrease of primary melts fluidity property.In addition,the fluidity of primary melts can have an influence on the property of pore.Pore structure in primary melts with high Al2 O3 content is associated with irregular shape and it also increases the number of pore with size below 50μm.