Dephosphorization of a High-phosphorus Iron Ore by Magnetic Roasting-leaching Process
In response to the characteristics of high-phosphorus iron ore,which the complex symbiotic relationship between iron minerals and phosphate minerals in high-phosphorus iron ore and the difficulty in efficient utilization through conventional beneficiation methods.The roasting-leaching technology for iron extraction and phosphorus reduction was proposed with a view to achieving efficient utilization of high-phosphorus iron ore.This paper investigated a high-phosphorus certain iron ore with a TFe grade 60.81%,FeO content14.92%,and P content 0.71%extracted from Algeria.The experimental study on iron extraction and dephosphorization was carried out by oxidizing roasting-magnetization roasting-magnetic separation-leaching process.The magnetic roasting process conditions of oxidation temperature 1 050 ℃,reduction temperature 520 ℃,reduction time 25 min and H2 concentration 50%were determined.The iron concentrate indexes of total Fe grade 65.50%,total Fe recovery 96.31%and P content 0.16%were obtained,which 77.46%of P removed.The experimental results offer guidance for iron extraction and dephosphorization of iron ore in Algeria.
high-phosphorus iron oreoxidizing roastingmagnetic roastingleaching
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