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首页> 外文期刊>ISIJ international >Dephosphorization Treatment of High Phosphorus Oolitic Iron Ore by Hydrometallurgical Process and Leaching Kinetics
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Dephosphorization Treatment of High Phosphorus Oolitic Iron Ore by Hydrometallurgical Process and Leaching Kinetics

机译：湿法冶金及浸出动力学脱磷处理高磷橄榄铁矿

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Dephosphorization process of high phosphorus oolitic iron ore by acid leaching and leaching kinetics were investigated in the paper. The high phosphorus ore samples (51%T.Fe, 0.52%P) used in this work were analysed by SEM-EDS and XRD, which showed their oolitic structure and mineral phases. Among the three kinds of acids (H_(2)SO_(4), HCl and HNO_(3)), sulfuric acid was the most appropriate one for dephosphorization, and structure changes after leaching were also investigated through the SEM and EDS analysis. The effects of acidity, particle size, stirring speed and temperature were researched in detail. Through acid leaching, phosphorus could be removed effectively, and iron loss was negligible, which was also studied by thermodynamic calculation. The experimental data could be well described by the unreacted shrinking core model and rate controlling step was found to be chemical reaction between apatite and acid. The apparent activation energy was calculated as 45.02 kJ/mol.
机译：研究了高磷橄榄铁矿石的酸浸脱磷工艺及动力学。通过SEM-EDS和XRD对这项工作中使用的高磷矿石样品（51％T.Fe，0.52％P）进行了分析，显示了它们的橄榄岩结构和矿物相。在三种酸（H_（2）SO_（4），HCl和HNO_（3））中，硫酸是最适合脱磷的酸，并且还通过SEM和EDS分析研究了浸出后的结构变化。详细研究了酸度，粒度，搅拌速度和温度的影响。通过酸浸可以有效地去除磷，铁的损失可以忽略不计，并通过热力学计算进行了研究。通过未反应的收缩核模型可以很好地描述实验数据，并且发现速率控制步骤是磷灰石与酸之间的化学反应。表观活化能经计算为45.02 kJ / mol。

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