湿法炼锌浸出液针铁矿法除铁晶种的制备

Preparation of goethite seeds for removal of ferrous/ferric ions from leaching solution of zinc in hydrometallurgy process

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6h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。

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.