Method for the hydrolytic precitpitation of iron

Details Method for the hydrolytic precitpitation of iron Method for the hydrolytic precitpitation of iron

C - Chemistry, Metallurgy

22

B

C22B 3/08 (2006.01) C22B 3/44 (2006.01) C22B 19/00 (2006.01)

Patent

CA 2429889

The invention relates to a method for the hydrolytic precipitation of iron from a sulphate solution as jarosite. A sulphate-containing solution, with iron present in divalent form, is routed to an iron precipitation stage, where the iron is oxidised to the trivalent form using an oxygen-containing gas. Also present in the precipitation stage are Na, K or NH4 ions and jarosite nuclei.

L'invention concerne un procédé de précipitation hydrolytique du fer à partir de jarosite sous forme de solution sulfatée. Une solution contenant des sulfates, avec du fer présent sous forme divalente, est acheminée vers un étage de précipitation dans lequel le fer est oxydé sous forme trivalente par utilisation d'un gaz contenant de l'oxygène. Dans cet étage de précipitation, sont aussi présents des ions Na, K ou NH¿4? et des germes de jarosite.

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