(中南大学 化学化工学院，长沙 410083)
摘 要: 利用水热法在酸性条件下制备针铁矿晶种，经TG-DTG和XRD分析，结果表明：前驱体经80~110 ℃水热，可以制得针铁矿，且在110 ℃水热条件下，水热反应6 h所得产物结晶最好。受水热反应器限制，水热法制备的针铁矿的产量有限，若改用准均相成核法制备针铁矿晶种，可以满足湿法炼锌浸出液针铁矿法除铁所需大量晶种的要求。
关键字: 针铁矿；水热法；准均相成核法；晶种
from leaching solution of zinc in hydrometallurgy process
（School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China）
Abstract:Goethite (α-FeOOH) was successfully prepared via hydrothermal method in acidic solutions. Thermogravimetry-differential thermogravimetry (TG-DTG) and X-ray diffraction (XRD) pattern indicate that the goethite crystal seed is successfully prepared from precursor via hydrothermal method in acidic solutions by hydrothermal synthesis at 80 −110 ℃, and the pure goethite with good crystal structure was prepared by hydrothermal process at 110 ℃ for 6 h. Larger amount of goethite seeds could be produced by pseudo-homogeneous nucleation method to meet the mass demand of industry to remove ferrous/ferric ions from the leaching solution in zinc hydrometallurgy.
Key words: goethite; hydrothermal process; pseudo-homogeneous nucleation method; crystal seeds
