用副产硫酸亚铁生产优质氧化铁

介绍了以钛白粉厂副产的硫酸亚铁为原料,制备氧化铁的工业化生产新工艺。以自制的除杂剂,废铁皮作还原剂,硫酸和氨水调节pH值,PN-133为絮凝剂,有效的去除了各种杂质,尤其是S iO2的去除效果显著,得到精制FeSO4。制备FeCO3条件:反应温度不大于42~43℃,FeSO4溶液密度1.19~1.21 g/cm3,NH4HCO3溶液密度1.07 g/cm3,n(FeSO4)∶n(NH4HCO3)=0.7∶1,开始10~20 m in,FeSO4溶液先以15 L/m in的流速加入到NH4HCO3溶液中,然后再以30 L/m in的流速加入,反应时间1 h。FeCO3经水洗、干燥,在650~700℃煅烧30 m in,得产品Fe2O3,含量99.45%,活性高,质量符合HG/T2574-94优等品的标准。

Production of high quality ferric oxide by by-product ferrous sulfate

The industrialized production new process of manufacturing ferric oxide using ferrous sulfate as raw material was introduced.Using self-made removing impurity agent,waste sheet iron as reductive(agent),and using sulfuric acid and ammonia water to regulate pH value,PN-133 as flocculating agent,various impurity had been removed effectively,especially SiO_2.Preparation conditions of FeCO_3 were:reaction temperature was less than 42～43℃,the density of FeSO_4 solution was 1.19～1.21(g/cm~3,) the density of NH_4HCO_3 solution was 1.07 g/cm~3,n(FeSO_4)∶n(NH_4HCO_3)=0.7∶1,starting 10~20 min,FeSO_4 solution was added to NH_4HCO_3 solution at 15 L/min first and then at 30 L/min,the reaction time was 1 h.After being water washed and dried,then calcined at 650～700℃,Fe_2O_3=99.45% could be got with high activity,and it's quality meet the standard of premium grades of HG/T2574-94.