微波场中高含铁量煤矸石酸浸制备氧化铁的研究

研究了微波场中酸浸高含铁量煤矸石制取Fe2O3,探索了煅烧时间、煅烧温度、酸浸温度、酸浸时间、微波功率、HCl质量分数、煤矸石粒度对Fe2O3浸出率的影响。结果表明,在固液比1∶3条件下,煅烧时间为120 min,煅烧温度为700℃,酸浸温度为105℃,酸浸时间为30 min,微波功率为500 W,HCl质量分数为20%,煤矸石粒度为0.1753 mm,Fe2O3的浸出率可达39.36%。与传统方法相比,在大大节省时间的同时,改善了操作环境。制备的Fe2O3样品有较好的应用价值。

Study on preparation of ferric oxide with acid pickling of Iron-enriched Gangue by Microwave Irradiation

The ferric oxide was prepared with iron-enriched gangue in microwave field.The effects of calcination time,calcination temperature,acid pickling temperature,acid pickling time,microwave power,hydrochloride acid concentration,coal gangue particle size on leaching rate of ferric oxide were investigated.The results show that under the conditions solid-liquid ratio 1 ∶3,calcination time 120 minutes,calcination temperature 700 ℃,acid pickling temperature 105 ℃,acid pickling time 30 minutes,microwave power 500 W,hydrochloride acid concentration 20%,coal gangue particle size 0.1753 mm,leaching rate of ferric oxide can reach 33.96%.The acid leaching time of the technology is greatly less than traditional technology while improving the operating environment.The ferric oxide prepared samples have better usability.