【摘要】 氧化-还原-酸浸工艺是处理攀西钛渣最具工业应用潜力的工艺。以攀西钛铁矿为原料，采用还原熔炼工艺制备不同Fe/Mg（摩尔比）的钛渣，系统研究了Fe/Mg对钛渣氧化还原改性-盐酸浸出升级工艺的影响。结果表明，1 000℃高温氧化时，Fe/Mg对钛渣的氧化率基本无影响；800℃低温氧化时，降低Fe/Mg可使钛渣的氧化速率降低，且氧化不完全。在还原过程中，Fe/Mg对Fe³⁺还原为Fe²⁺的还原速率无明显影响，但对其物相转变影响显著，Fe/Mg<1.9的钛渣还原后仍存在大量（M₃O₅）³相，使其酸浸除杂后无法达到氯化钛白粉的质量要求。更多还原

【Abstract】 The oxidation-reduction-acid leaching process is one of the most potential industrial applications in the Panxi titanium slag treatment.Using Panxi ilmenite as raw material,titanium slag with different Fe/Mg molar ratios was prepared by the reduction smelting process.In this study,the effect of the Fe/Mg ratio on the redox modification hydrochloric acid leaching process of titanium slag was investigated.The results showed that the Fe/Mg ratio did not affect the oxidation rate of titanium slag at 1 000℃.When the oxidation was at a low temperature of 800℃，the reduction of the Fe/Mg ratio reduced the oxidation rate of titanium slag,causing an incomplete oxidation.During the reduction process,the Fe/Mg ratio has no obvious effect on the reduction rate of Fe³⁺to Fe²⁺but has a significant effect on its phase transformation.After the reduction of titanium slag with Fe/Mg<1.9,there are still a large number of （M₃O₅）³ phases,which makes it unable to meet the impurity removal requirements of titanium chloride powder after acid leaching.更多还原