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以球团厂实际配矿为基础,选取铁矿粉OA、OB、OC和OD,以膨润土作为黏结剂进行试验分析Mg O和Ti O2对镁质钒钛球团矿冶金性能的影响,并得出合适的Ti O2质量分数和Mg O质量分数,为生产镁质钒钛磁铁矿球团提供理论依据。结果表明,当w(Mg O)从1.25%升高到2.34%,球团矿抗压强度从2 511降低到2 453 N/P,还原膨胀指数降低了13.17%;当w(TiO_2)从3.97%升高到5.07%,球团矿抗压强度从2 511降低到2 383 N/P,还原膨胀指数略有下降,影响较小。球团矿中的w(MgO)从1.32%升高到2.38%,球团矿的熔融温度区间降低了40%,改善了其熔滴性能,但Mg O固溶体等难还原矿物降低了球团的还原度指数。球团矿综合冶金性能最优的配比参数(质量分数)为OA矿粉50%、OB矿粉21%、OC矿粉10%、OD矿粉19%和膨润土1.8%。
Based on the actual ore blending of pellet mill, the effects of MgO and Ti O2 on the metallurgical properties of magnesia-bearing vanadium-titanium pellets were investigated by taking OA, OB, OC and OD of iron ore powder as the binder The proper Ti O2 mass fraction and Mg O mass fraction were obtained, which could provide the theoretical basis for the production of magnesian vanadium titanomagnetite pellets. The results show that when w (MgO) increases from 1.25% to 2.34%, the compressive strength of pellets reduces from 2 511 to 2 453 N / P, the reduction swelling index decreases 13.17% % To 5.07%, the compressive strength of pellets decreased from 2 511 to 2 383 N / P, the reduction and swelling index decreased slightly with little effect. The increase of w (MgO) in pellets from 1.32% to 2.38% reduced the melting temperature range of pellets by 40%, which improved the droplet properties, but the refractory minerals such as MgO solid solution reduced the pellets Reduction index. The optimal metallurgical properties of the pellets are as follows: 50% of OA slag, 21% of OB ore powder, 10% of OC ore powder, 19% of OD ore powder and 1.8% of bentonite.