The sintering basic characteristics of iron ore play a key role in the process of sintering. In this study, the effects of B2O3 on the assimilation characteristics, softening temperature, fluidity of liquid phase, compressive strength of bonding phase, and microstructure of the mixed fine powder of hematite and vanadium-titanium magnetite (H-VTM) are studied. Results show that B2O3 content from 0%–5% (wt%) could improve the assimilation characteristics of the H-VTM and increase the amount of the liquid phase. The liquidity of the bonding phase index (LBPI) of the H-VTM increases from 3.7 to 24.2. When B2O3 content exceeds 2%, the diameter of the pore in the H-VTM sintered samples enlarges. However, the compressive strength gradually decreases. Boron and calcium-magnesium-aluminium elements are abundant in the bonding phase, which can reduce the formation of calcium silicate and perovskite in H-VTM sintered samples.

中文翻译：

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B2O3含量对钒钛磁铁矿和赤铁矿混合矿粉烧结基本特性的影响

铁矿石的烧结基本特性在烧结过程中起着关键作用。本研究研究了B2O3对赤铁矿-钒钛磁铁矿混合细粉(H-VTM)的同化特性、软化温度、液相流动性、结合相抗压强度和微观结构的影响。结果表明，0%~5% (wt%) 的 B2O3 含量可以改善 H-VTM 的同化特性并增加液相量。H-VTM 的结合相指数（LBPI）的流动性从 3.7 增加到 24.2。当 B2O3 含量超过 2% 时，H-VTM 烧结样品的孔隙直径变大。但是，抗压强度逐渐降低。硼和钙镁铝元素在结合相中含量丰富，