由蛇纹石制备高纯氧化铁的研究

以蛇纹石酸浸出液净化过程所获铁铝沉淀物为原料，采用氧化沉淀及煅烧法工艺制备了高纯氧化铁。通过对铁铝沉淀物精制、铁沉淀物的酸解、酸解液中三价铁的还原、铁溶液的净化、氧化铁前驱物α-FeOOH的制备与煅烧过程的研究，确定了优化工艺条件。实验结果表明，在优化工艺条件下，铁收率为99.9%，氧化铁纯度达99.8%，符合软磁铁氧体用氧化铁的质量要求。

Preparation of high purity ferric oxide from serpentine

Iron oxide with high purity was prepared by oxidation precipitation and calcination method.The Fe-Al precipitate formed in the purification process of acid leaching solution of serpentine was adopted as raw material.By some detailed investigation，such as the refined preparing of Fe-Al precipitate，the acid hydrolysis of iron-based precipitate，the reducing of Fe3+ in the acid hydrolysis solution，the purifying of iron solution，the preparation of iron oxide precursor（α-FeOOH） and the study of the calcination process，the optimum conditions were confirmed.Moreover，the corresponded experimental results indicated that the yield of iron and the purity of iron oxide could be up to 99.9% and 99.8%，respectively，which met with the quality requirements of ferrite iron applied in soft ferrite.