【摘要】 助化学平衡计算法,对冶炼过程中钛、碳及伴生元素的分配行为进行了研究,并用生产结果加以验证,计算结果与实验结果较吻合。结果表明:钛铁矿中Ti O2和Fe O含量的增加,增加了作为微量元素和用于还原Fe O和Ti O2的C量,提高了钛渣中总的Ti O2和Ti2O3的量,同时降低了用于还原Fe2O3的C量,降低了钛渣中Fe O的含量。当钛渣中Fe2O3含量由12%增加到20%时,作为微量元素C和用于还原Fe2O3的C量分别降低了0.006 mol和0.348 mol,钛渣中总的Ti O2和Ti2O3的量分别降低了8.34%和2.37%,而用于还原Fe2O3的C量增加了约0.36 mol,Fe O的质量分数增加了8.94%。其他成分对钛渣中总的Ti O2量的影响程度由大到小排序为:Si O2>Mg O>Al2O3>Ca O。对钛渣还原冶炼过程中元素分配行为的研究,可实现对工艺的更好控制、提高钛渣品位。更多还原

【Abstract】 Based on chemical equilibrium calculation method in multi-phase, multi-component system, the effects of ilmenite component(Ti O2, Fe2O3, Fe O) and AIR(anthracite to ilmenite ratio) on element distribution of titanium slag smelted by DC arc furnace were studied. The calculated results agree well with the experimental results. With increasing amount of Ti O2 and Fe O in ilmenite, the amount of C as trace element and for Ti O2 and Fe O reduction increases, the total mass fraction of Ti O2 and Ti2O3 in slag increases, while the mass fraction of Fe O in slag decreases. However, the effect of Fe2O3 content in ilmenite on the slag composition is opposite. With increasing of Ti O2 in ilmenite from 42% to 50%, the mass fraction of Ti O2 in slag increases by 7.9%. However, with increasing of Fe2O3 in ilmenite from 12% to 20%, the mass fraction of Fe O in slag increases by 8.94%. Moreover, with increasing of AIR from 120 to 134 kg·t-1, the mass fraction of Ti O2 in slag increases from 83.8 % to 91.77%, Fe O mass fraction decreases from 14.7% to 6.25%. The order of effect of other components on the total Ti O2 in slag is displayed as: Si O2>Mg O>Al2O3>Ca O. Ilmenite component and AIR can be controlled to achieve selective reduction of oxides in the melt. Study on allocation behavior of elements during titanium slag smelting reduction process can help to control the process, improve the slag grade.更多还原