Treating iron ore

摘要

A process for lowering the concentration of phosphorus in iron ore is disclosed. The process comprises roasting and then leaching iron ore or upgraded concentrates of iron ore having a concentration of at least 0.05 wt. % phosphorus to lower the phosphorus level in the iron ore and then washing leached iron ore to at least partially remove leach liquor retained on the iron ore. The process allows more extensive exploitation of high phosphorus resources than is currently possible.