硫酸亚铁制备高品质氧化铁红的新工艺研究

Study on new manufacture technology of high quality red iron oxide from ferrous sulfate

对钛白副产物硫酸亚铁制备高品质氧化铁红的新工艺进行了研究。本工艺以生产钛白粉的副产物硫酸亚铁为原料,通过化学方法净化钛白副产物硫酸亚铁,除杂后得纯净的硫酸亚铁,再经过脱水、煅烧等工序,得到铁磁体用氧化铁红。通过实验得到了制备高品质氧化铁红的最佳工艺条件。在最佳工艺条件下,制得的氧化铁红纯度高达99.8%,另外,所制得的氧化铁红产品还具有其他物理性能指标,如产品的晶型为α型三氧化二铁,平均粒度小于1.5μm,松装密度小于0.35 g/cm3,水质量分数小于0.5%。

A new manufacture technology for high quality red iron oxide with ferrous sulfate by-produced from titanium dioxide production was studied.This technology used by-product ferrous sulfate of titanium dioxide production as raw material, and purified it by chemical method.The red iron oxide for ferromagnet was obtained through the processes, of dehydration and calcination from the purified ferrous sulphate.Through experiments, the optimal technological conditions of preparing high quality red iron oxide were obtained.The product was of the highest quality of 99.8% under the optimal conditions.Further- more, the as-prepared red iron oxide had other good physical performances, such as the product＇s crystal shape was α- Fe2O3, the average particle size was less than 1.5 μm,bulk density was less than 0.35 g/cm3,and the mass fraction of water was less than 0.5%.