材料期刊网

为了探索在现有原料条件下不同w(TiO2)对高钛型磁铁矿烧结性能的影响，采用粒度组成与攀精矿相近的钛精矿改变其w(TiO2)，消除了烧结料粒度变化对试验结果的影响，真实反映w(TiO2)的影响规律。通过试验得出，在保持烧结矿高碱度与其他成分基本不变条件下，当烧结矿w(TiO2)为6%～10%时，随着w(TiO2)增加，混合料初熔和熔化温度均上升，烧结矿强度和成品率下降，低温还原粉化率上升，还原性降低，熔滴性能变差，储存性能变化不大；钛赤铁矿、铁酸钙质量分数减少，钛磁铁矿以及含钛矿物钙钛矿、钛辉石、钛榴石质量分数增加；烧结矿的孔洞增加，矿物形态和结构变差。

In order to explore the effects of different contents of TiO2 on the sintering properties of high titanium vanadi-um-titanium magnetite,the current study adopted titanium concentrate whose size distribution and compositions were similar to that of Panzhihua concentrates to vary w(TiO2) . The design could eliminate the effects of the change of parti-cle size in the sintered material on the experimental results,which could truly reflect the influence of TiO2 well. Main re-sults show that under the condition of high alkalinity of sinter and the same compositions,when the w(TiO2) in sinter in-creased from 6%to 10%,both the initial melting temperature and the melting temperature increased,the strength and yield of sinter decreased,the reduction powdered ratio of sinter in low temperature rose,and the reducibility and the droplet property became worse. While the storage performance of sinter had little change. On the other hand,the con-tents of hematite titanium iron and calcium ferrite decreased,the contents of titaniferous magnetite and titanium mineral perovskite,titanium pyroxene,garnet titanium increased. The hole number in sinter increased,and the mineral morphol-ogy and structure became worse.