This paper aims to improve the metallurgical properties of vanadium-titanium magnetite (VTM) concentrates pellets by applying solid waste containing B2O3. Thus, the effects of adding B2O3 on the drop strength, compressive strength, pores area ratio, high-temperature metallurgical properties, and microstructure of VTM pellets were studied through pelletizing and roasting experiments. Results show that the addition of B2O3 reagent is not conducive to the increase of the drop strength of the green pellets. Nevertheless, the compressive strength and fracture toughness of the roasted pellets can be improved by adding more B2O3 during the pelletizing. The reduction degree of VTM pellets is firstly decreased and then increased with the added B2O3 amount. It is possible to improve the compaction degree and restrain the reduction-pulverization degree of the pellet by a low amount of additive (B2O3). The reduction-expansion performance of VTM pellets, in turn, can be raised by adding B2O3.

中文翻译：

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B2O3对钒钛磁铁矿球团影响的实验研究

本文旨在通过应用含 B2O3 的固体废物改善钒钛磁铁矿 (VTM) 精矿球团的冶金性能。因此，通过球团和焙烧实验研究了加入B2O3对VTM球团落强度、抗压强度、孔面积比、高温冶金性能和微观结构的影响。结果表明，B2O3试剂的加入不利于生球团落落强度的增加。尽管如此，在造球过程中加入更多的 B2O3 可以提高焙烧球团的抗压强度和断裂韧性。VTM球团矿的还原度随B2O3添加量的增加先减小后增大。可以通过少量的添加剂（B2O3）来提高压实度并抑制颗粒的还原粉碎度。VTM 球团的还原膨胀性能又可以通过添加 B2O3 来提高。