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- W2068045334 abstract "Abstract A hydrometallurgical method for the removal of phosphorus from iron ore is presented. The apatite content (∼ 1%) of a Swedish ore is removed (> 95%) by leaching the ore with nitric acid. The iron loss is less than 0.05% while the alkali metal content is greatly reduced (> 60%). The quality of the ore, as a sinter feed, has been slightly improved upon leaching. The characteristics of the percolation leaching operation by nitric acid solutions (2–8 M ) were investigated. The leaching kinetics have also been studied. It is shown that the principal reaction of apatite dissolution is first order with respect to hydrogen ions and is step-limited by diffusion. The dissolution of iron is found to be sensitive, more than that of the apatite, to the initial acidity of leach solutions. The variation of the flow velocity has a similar effect on the dissolution of both apatite and iron. An overall leach-rate equation is established." @default.
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- W2068045334 date "1989-05-01" @default.
- W2068045334 modified "2023-09-25" @default.
- W2068045334 title "The removal of phosphorus from iron ore by leaching with nitric acid" @default.
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- W2068045334 doi "https://doi.org/10.1016/0304-386x(89)90001-7" @default.
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