以钛白副产物硫酸亚铁为主要原料制备氧化铁黄，考察了NaOH与FeSO4×7H2O摩尔比、初始Fe2+浓度、曝气速率和温度对晶种形成的影响及晶种浓度、pH值和FeSO4×7H2O投加量对产品的影响，优化了工艺参数. 结果表明，在NaOH与FeSO4×7H2O摩尔比0.5、初始Fe2+浓度0.7 mol/L、曝气速率2.5 L/min、35℃的条件下，晶种产量和产率分别为4.00 g和12.01 g/h，呈棕黄色胶体状态；在晶种浓度20%(j)、pH=4.5~5.0及FeSO4×7H2O投加量60 g的条件下，氧化铁黄产量和产率分别为20.97 g和8.99 g/h，含铁量(以Fe2O3计)为86.95%. 所制氧化铁黄呈较均一的棒状颗粒，物相组成为FeOOH，平均粒径860 nm，比表面积21.98 m2/g，各项指标均优于HG/T 2249-91行业一级品标准.

With ferrous sulfate by-product from the production of titanium dioxide as main raw material, iron oxide yellow was prepared. Not only the effects of mass ratio of NaOH to FeSO4×7H2O, initial Fe2+ concentration, aeration rate and temperature on the seed crystal, but also those of concentration of seed crystal, pH value and initial ferrous sulfate amount on the iron oxide yellow examined. The process conditions were optimized. The results showed that the production was 4.00 g, the productivity was 12.01 g/h, the seed crystal was claybank and colloid when the molar ratio of NaOH to FeSO4×7H2O was 0.5, initial Fe2+ concentration 0.7 mol/L, aeration rate 2.5 L/min and temperature 35℃ in the preparation stage of seed crystal. Meanwhile, the production was 20.97 g, the productivity was 8.99 g/h, the iron content in oxide was 86.95% when the concentration of seed crystal was 20%, pH value 4.5~ 5.0, initial ferrous sulfate amount 60 g in the preparation stage of iron oxide yellow. The prepared iron oxide yellow was homogeneous claviform particles with the phase composition of FeOOH, average diameter 860 nm, and specific surface area 21.98 m2/g, and its quality was over the first grade of industrial standard HG/T 2249-91.