黄铵铁矾制备花簇状三氧化二铁

Preparation of Flower-like Fe_2O_3 from Ammonium Jarosite

以氧化锌矿硫酸铵焙烧熟料溶出液的除铁矾渣为研究对象,氢氧化钠为反应介质,采用湿化学法分解黄铵铁矾渣,以实现黄铵铁矾渣的综合利用。实验考察了黄铵铁矾的转化率与分解温度、时间、分解pH值、液固比的关系,得到较适宜的分解条件,并采用XRD、SEM和化学成分分析等手段对分解产物进行了表征,结果表明黄铵铁矾渣的分解产物为水合氧化铁,在烘干过程得到Fe2O3,但分解不完全,Fe2O3的形貌与黄铵铁矾近似,表面较粗糙。

Employing the ammonium jarosite by eliminating iron in the digestion solution of the clinker that was obtained from baking the zinc oxide ore using ammonium sulfate as raw material and NaOH as reaction medium, the wet chemistry method was adopted to decompose the ammonium jarosite, which was aim to achieve the comprehensive utilization of it. The influences of the decomposition temperature, time, decomposition pH value and liquid-solid ratio on the conversion rate of the ammonium jarosite were investigated, and the appropriate reaction conditions were also gained. The XRD, SEM and components analysis were used to characterize the decomposition product. The results indicated that the decomposition product was ferric oxide hydrate that was decomposed to Fe2O3 in dying but not completely. The morphology of Fe2O3 was almost the same to that of the ammonium jarosite with more rough surface.