(中南大學(xué) 化學(xué)化工學(xué)院，長沙 410083)
摘 要: 利用水熱法在酸性條件下制備針鐵礦晶種，經(jīng)TG-DTG和XRD分析，結(jié)果表明：前驅(qū)體經(jīng)80~110 ℃水熱，可以制得針鐵礦，且在110 ℃水熱條件下，水熱反應(yīng)6 h所得產(chǎn)物結(jié)晶最好。受水熱反應(yīng)器限制，水熱法制備的針鐵礦的產(chǎn)量有限，若改用準(zhǔn)均相成核法制備針鐵礦晶種，可以滿足濕法煉鋅浸出液針鐵礦法除鐵所需大量晶種的要求。
關(guān)鍵字: 針鐵礦；水熱法；準(zhǔn)均相成核法；晶種
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
